LEO GORDON MD
NPI 1821028499
Internal Medicine - Hematology & Oncology in Chicago, IL


Quality Rating: 94.1 out of 100 score

NPI Status: Active since July 03, 2006

Contact Information

675 N SAINT CLAIR ST
GALTER 21-100
CHICAGO, IL
ZIP 60611
Phone: (312) 695-0990
Fax: (312) 695-6189

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  • Individual
  • Male
  • Years of Experience 53
  • Internal Medicine
  • Hematology & Oncology
  • Accepts Medicare Approved Payment
  • PECOS Enrolled

About LEO GORDON

This page provides the complete NPI Profile along with additional information for Leo Gordon, an internist established in Chicago, Illinois with a medical specialization in Internal Medicine, focusing in hematology & oncology and more than 53 years of experience. He graduated from University Of Cincinnati College Of Medicine in 1973. The healthcare provider is registered in the NPI registry with number 1821028499 assigned on July 2006. The practitioner's primary taxonomy code is 207RH0003X with license number 036050052 (IL). The provider is registered as an individual and his NPI record was last updated one year ago.

NPI
1821028499
Provider Name
LEO GORDON MD
Gender
Male
Entity Type
Individual
Location Address
675 N SAINT CLAIR ST GALTER 21-100 CHICAGO, IL 60611
Location Phone
(312) 695-0990
Location Fax
(312) 695-6189
Mailing Address
680 N LAKE SHORE DR SUITE 1000 CHICAGO, IL 60611
Mailing Phone
(312) 695-9797
Medical School Name
UNIVERSITY OF CINCINNATI COLLEGE OF MEDICINE
Graduation Year
1973
Is Sole Proprietor?
No
Enumeration Date
07-03-2006
Last Update Date
01-06-2025
Code Navigator

An internist like Leo Gordon is a physician who has completed an internal medicine residency and is board-certified or board-eligible in an internist specialty. Internists are trained to care for adults of all ages for many different medical conditions. An internist typically monitors chronic physical conditions, identifies acute diseases, provides family planning, provides counseling about wellness and disease prevention, etc.

Location Map

Specialty - Primary Taxonomy

The NPI enumerator requires providers to submit at least one taxonomy code. A taxonomy code is a unique 10-character code that describes the healthcare provider type, classification, and the area of specialization. There could be only one primary taxonomy code per NPI record. For individual NPIs the license data is associated to the taxonomy code.

Classification

Internal Medicine Hematology & Oncology

Taxonomy Code
207RH0003X
Type
Allopathic & Osteopathic Physicians
License No.
036050052
License State
IL
Taxonomy Description
An internist doctor of osteopathy that specializes in the treatment of the combination of hematology and oncology disorders. A doctor of osteopathy that is board eligible/certified by the American Osteopathic Board of Internal Medicine WAS able to obtain a Certificate of Special Qualifications in the field of Hematology and Oncology. The Certificate is NO longer offered.

Secondary Taxonomies

The provider has reported to the NPI enumerator additional taxonomy codes. Multiple taxonomy codes may represent subspecialties or other areas of specialization the provider maybe licensed to practice.

No. Taxonomy Code Type Classification /
Specialization
License No. (State)
1207RH0000XAllopathic & Osteopathic Physicians

Internal Medicine
Hematology

036-050052 (IL)

Medicare Participation & PECOS Enrollment Status

Leo Gordon is registered with Medicare and accepts claims assignment, this means the provider accepts the approved amount for the cost of rendered services as full payment. Participating providers may not charge beneficiaries more than the approved amount for their services. Please keep in mind that beneficiaries still have to pay a coinsurance or copayment amount for a visit or service.

Leo Gordon is enrolled in PECOS and is eligible to order or refer health care services for Medicare patients. The provider is eligible to order or refer: Part B Clinical Laboratory and Imaging, Durable Medical Equipment (DME), a Home Health Agency (HHA) and Power Mobility Devices.

What is PECOS?
PECOS is the online Medicare enrollment management system or Provider, Enrollment, Chain and Ownership System. The PECOS system is a database of providers who have registered with CMS as providers or suppliers. PECOS is the primary source of information about verified Medicare professionals. Providers that want to participate in this program need to enroll in PECOS with their NPI number to avoid denied claims.

  • Is the provider registered in PECOS? Yes

  • PECOS PAC ID: 5092700484

    What is the PECOS Associate Control ID?
    A PAC ID is a unique 10-digit number assigned to an individual or organization healthcare provider in PECOS. The PAC ID is used to link together all the provider information, like tax identification numbers and organizational names. A PAC ID can be connected to multiple Enrollment IDs if an individual or organization has enrolled in PECOS more than once.

  • PECOS Enrollment ID: I20040415001098

    What is the Provider Enrollment ID?
    The Enrollment ID is a unique alphanumeric 15-digit code assigned to each new provider's PECOS enrollment application. The Enrollment ID is used to link together all the provider enrollment information like enrollment type, state, provider specialty, and reassignment of benefits.

  • Accepts Medicare Assignment? Yes

    What does it mean "accepts medicare assignment"?
    When a provider accepts Medicare assignment, the provider agrees to be paid directly by Medicare and to accept the payment amount approved by Medicare. Additionally, the provider agrees to not bill patients for more than the Medicare deductible and coinsurance amounts.
    A provider who doesn't accept assignment may charge you up to 15% over the Medicare-approved amount. This is known as the limiting charge. You may have to pay this amount, or it may be covered by another insurer.

  • Eligible to Order or Refer Part B Clinical Laboratory and Imaging: Yes

  • Eligible to Order or Refer Durable Medical Equipment (DMEPOS): Yes

  • Eligible to Order or Refer a Home Health Agency (HHA): Yes

  • Eligible to Order or Refer Power Mobility Devices: Yes

Areas of Expertise

The following services and procedures, recently provided to Medicare patients, illustrate the range of care this provider offers. This list reflects the variety of services available to all patients visiting the practice and is based on 2022 Medicare dataset. In general, the more frequently a provider treats specific conditions or performs particular procedures, the more experienced they become in addressing similar patient needs. The provider has delivered many of the services listed below to Medicare patients. Please note that this list does not include services provided to patients who are not covered by Medicare.

Administration of additional new drug or substance into vein using push technique

This procedure involves injecting a new medication or substance directly into your vein using a method called the 'push' technique. It's a quick way to deliver medication into your bloodstream for fast-acting relief or treatment.

This service was performed 26 times for 17 patients

Administration of additional new drug or substance into vein, 1 hour or less

This procedure involves introducing a new drug or substance into your vein, typically via an IV drip. It lasts for an hour or less. This method allows the substance to quickly reach your bloodstream, ensuring rapid and effective treatment.

This service was performed 38 times for 31 patients

Administration of chemotherapy into vein, 1 hour or less

Chemotherapy is a treatment that uses drugs to destroy cancer cells. When administered into a vein, it's often through an IV. This procedure usually lasts 1 hour or less. You may feel a slight pinch as the needle is inserted, but it's generally painless.

This service was performed 176 times for 124 patients

Administration of chemotherapy into vein, each additional hour

Chemotherapy is a treatment method that uses drugs to destroy cancer cells. The drugs are administered into a vein, usually in the arm. Each additional hour of chemotherapy allows for more of the medication to enter your bloodstream to fight against the cancer cells.

This service was performed 32 times for 23 patients

Administration of influenza virus vaccine

The administration of the influenza virus vaccine, also known as the flu shot, is a simple procedure to protect against the flu. A healthcare provider injects a small dose of the vaccine into your arm. This stimulates your immune system to produce antibodies, which will help your body fight off the flu if exposed.

This service was performed 12 times for 12 patients

Administration of non-hormonal anti-neoplastic chemotherapy under skin or into muscle

This procedure involves giving anti-cancer drugs, which don't contain hormones, into the muscle or under the skin. These drugs help to stop the growth of cancer cells. The process is usually quick and done by a healthcare professional.

This service was performed 105 times for 51 patients

Application of on-body injector for under skin injection

An on-body injector is a device used to deliver medication under the skin. It's applied to a clean area of skin, usually the abdomen or back of the arm. The device is activated to inject the medication slowly, ensuring a steady absorption. It's a painless, safe, and effective way to administer certain types of medication.

This service was performed 11 times for 11 patients

Chemotherapy administration, intravenous infusion technique; initiation of infusion in the office/clinic setting using office/clinic pump/supplies, with continuation of the infusion in the community setting (e.g., home, domiciliary, rest home or assisted l

Chemotherapy is a treatment method that uses drugs to destroy cancer cells. In the office, a pump is used to start an intravenous infusion of these drugs. The infusion can then be continued at home or another setting, like a rest home.

This service was performed 23 times for 13 patients

Established patient office or other outpatient visit, 30-39 minutes

This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.

This service was performed 613 times for 281 patients

Established patient office or other outpatient visit, 40-54 minutes

This service involves a follow-up appointment for existing patients, lasting between 40 to 54 minutes. During this time, your healthcare provider will assess your current health status, discuss any changes or concerns, review your treatment plan, and answer any questions you may have.

This service was performed 37 times for 29 patients

Follow-up hospital inpatient care per day, typically 25 minutes

Follow-up hospital inpatient care involves daily check-ups while you're admitted in the hospital. Typically, a healthcare provider spends about 25 minutes each day reviewing your condition, adjusting treatment if needed, and answering any questions you might have.

This service was performed 44 times for 16 patients

Infusion into a vein for therapy, prevention, or diagnosis, 1 hour or less

This is a procedure where a medical professional inserts a small tube into your vein to deliver medication, nutrients, or fluids directly into your bloodstream. This can be for treatment, prevention, or diagnosis. The process typically takes less than an hour.

This service was performed 51 times for 38 patients

Infusion into a vein for therapy, prevention, or diagnosis, additional sequential infusion, 1 hour or less

This procedure involves injecting fluids or medication directly into your vein. It's used for treatment, prevention, or diagnosis. An additional sequential infusion may be given within an hour if needed. This helps to ensure the medicine is distributed effectively in your body.

This service was performed 67 times for 42 patients

Infusion into a vein for therapy, prevention, or diagnosis, each additional hour

This procedure involves delivering medication, fluids, or nutrients directly into your vein. This is done to treat, prevent, or diagnose various conditions. Each additional hour refers to the extended time you may need to receive these substances for optimal results.

This service was performed 69 times for 22 patients

Injection of additional new drug or substance into vein

This procedure involves introducing a new medication or substance into your bloodstream via a vein. It's typically done using a small needle. The substance can help treat various conditions or assist in diagnostic procedures. It's generally safe and monitored by professionals.

This service was performed 184 times for 80 patients

Injection of drug or substance under skin or into muscle

This procedure involves administering medication directly under the skin or into a muscle. A small needle is used to inject the drug, allowing it to be absorbed quickly into the bloodstream. It's a common method for delivering a variety of medications.

This service was performed 60 times for 41 patients

Injection, atropine sulfate, 0.01 mg

Atropine sulfate is a medication given via injection to regulate heart rate or treat certain types of poisoning. The 0.01 mg dosage is carefully measured to provide effective, safe treatment.

This service was performed 800 times for 11 patients

Injection, bevacizumab-awwb, biosimilar, (mvasi), 10 mg

Bevacizumab-awwb (Mvasi) is a biosimilar medication given through injection. It's designed to interfere with the growth of cancer cells by blocking their blood supply. It's commonly used in treating various types of cancer. Each dosage contains 10 mg of the medicine.

This service was performed 984 times for 11 patients

Injection, bortezomib (velcade), 0.1 mg

Bortezomib (Velcade) is a medication administered through an injection. It's used to treat multiple myeloma and mantle cell lymphoma, types of cancer. It works by blocking certain proteins in cancer cells, slowing their growth.

This service was performed 1,257 times for 31 patients

Injection, carfilzomib, 1 mg

Carfilzomib is a medication given through injection to treat certain types of cancer, particularly multiple myeloma. It works by stopping or slowing the growth of cancer cells in your body. The dosage is determined by your doctor based on your medical condition.

This service was performed 1,763 times for 13 patients

Injection, daratumumab, 10 mg and hyaluronidase-fihj

Daratumumab and hyaluronidase-fihj is an injection administered to treat certain types of blood cancer. The medication works by targeting and killing specific cancer cells. It's often given under the skin to reduce side effects and improve patient comfort.

This service was performed 11,160 times for 33 patients

Injection, dexamethasone sodium phosphate, 1 mg

Dexamethasone sodium phosphate is a medication given via injection. It is a type of steroid that helps reduce inflammation and immune responses. It can be used to treat a variety of conditions, such as allergies, skin conditions, arthritis, and more.

This service was performed 816 times for 50 patients

Injection, diphenhydramine hcl, up to 50 mg

Diphenhydramine HCL injection is a medicine given to alleviate symptoms of allergies, colds, or hay fever. It can also help with motion sickness and certain symptoms of Parkinson's disease. Up to 50 mg may be administered depending on your condition.

This service was performed 20 times for 18 patients

Injection, fluorouracil, 500 mg

Fluorouracil is a chemotherapy drug, given as an injection to treat various types of cancer. The 500 mg dose helps to stop cancer cells from growing and multiplying. You might feel some side effects, but these are typically manageable.

This service was performed 203 times for 14 patients

Injection, fosaprepitant, 1 mg

Fosaprepitant is an anti-nausea medication given via injection. It's often used to prevent nausea and vomiting caused by chemotherapy. This injection blocks signals to the brain that trigger these symptoms, helping you feel better.

This service was performed 3,000 times for 18 patients

Injection, granisetron hydrochloride, 100 mcg

Granisetron hydrochloride is an anti-nausea medication given by injection. It helps prevent nausea and vomiting often caused by cancer treatments like chemotherapy. Its dosage is measured in micrograms (mcg).

This service was performed 150 times for 13 patients

Injection, immune globulin, (gammagard liquid), non-lyophilized, (e.g., liquid), 500 mg

The Gammagard Liquid injection is a type of immune globulin therapy. It's used to boost your body's immune system, helping it fight off infections. The therapy involves injecting a liquid form of proteins, collected from healthy donors, into your body. This is a 500mg dose.

This service was performed 1,580 times for 18 patients

Injection, methylprednisolone sodium succinate, up to 125 mg

Methylprednisolone sodium succinate is a steroid medication injected into a muscle or vein. It helps reduce inflammation and immune response. It's used for various conditions like allergies, arthritis, breathing problems, or skin diseases. It's important to follow your doctor's instructions.

This service was performed 232 times for 28 patients

Injection, nivolumab, 1 mg

Nivolumab is a medication given via injection, often used in cancer treatment. It works by helping your immune system fight the cancer cells. The dosage is measured in milligrams (mg), with 1 mg being a common dose.

This service was performed 5,339 times for 11 patients

Injection, palonosetron hcl, 25 mcg

Palonosetron HCL is an injection used to prevent nausea and vomiting caused by chemotherapy. It works by blocking a natural substance (serotonin) in the body that can cause vomiting. This helps improve your comfort during cancer treatment.

This service was performed 530 times for 40 patients

Injection, pegfilgrastim, excludes biosimilar, 0.5 mg

Pegfilgrastim is a medication given via injection to stimulate the production of white blood cells. It's used to prevent infections after chemotherapy. This specific dose is 0.5 mg, and it's not a biosimilar, meaning it's the original, not a copy.

This service was performed 204 times for 16 patients

Injection, pembrolizumab, 1 mg

Pembrolizumab is a medication given via injection to help your body's immune system fight certain types of cancer. It's typically administered in a hospital or clinic by a healthcare professional.

This service was performed 4,400 times for 15 patients

Injection, pemetrexed, not otherwise specified, 10 mg

Pemetrexed injection is a medication administered to treat specific types of cancer, such as lung cancer or mesothelioma. The drug works by slowing the growth of cancer cells. This specific dosage refers to 10 mg of the drug.

This service was performed 1,088 times for 11 patients

Injection, tixagevimab and cilgavimab, for the pre-exposure prophylaxis only, for certain adults and pediatric individuals (12 years of age and older weighing at least 40kg) with no known sars-cov-2 exposure, who either have moderate to severely compromise

Tixagevimab and cilgavimab injection is a preventive treatment for certain adults and children (12+ years, weighing 40kg+) with compromised health conditions. It's used when there's no known exposure to SARS-CoV-2, to help their bodies better fend off potential infections.

This service was performed 17 times for 17 patients

Injection, tixagevimab and cilgavimab, for the pre-exposure prophylaxis only, for certain adults and pediatric individuals (12 years of age and older weighing at least 40kg) with no known sars-cov-2 exposure, who either have moderate to severely compromise

Tixagevimab and cilgavimab are medicines given via injection for pre-exposure prophylaxis against SARS-CoV-2. It's suitable for adults and children (12+ years, 40kg+) with compromised health, but no known exposure to the virus. This helps protect them from potential COVID-19 infection.

This service was performed 15 times for 15 patients

Injection, vitamin b-12 cyanocobalamin, up to 1000 mcg

This is a procedure where a small dose of Vitamin B-12, also known as Cyanocobalamin, is injected into your body. This vitamin is essential for nerve function and the production of red blood cells. It's often used to treat vitamin B-12 deficiency.

This service was performed 12 times for 11 patients

Insertion of needle into vein for collection of blood sample

This procedure involves inserting a small needle into a vein, typically in your arm, to collect a blood sample. It's a quick and simple process to help diagnose or monitor health conditions. You may feel a small prick, but discomfort is minimal.

This service was performed 38 times for 21 patients

New patient office or other outpatient visit, 60-74 minutes

This is a first-time patient visit where a healthcare professional spends 60-74 minutes with you. It involves a comprehensive evaluation, including your medical history and current health condition. They'll also advise on preventive health measures and formulate a treatment plan if needed.

This service was performed 20 times for 20 patients

Unclassified drugs

Unclassified drugs are medications that don't fit into an existing category or class due to their unique properties or uses. They may be used for various conditions and their effects may differ widely. Always ask your healthcare provider for more information about these drugs.

This service was performed 18 times for 11 patients

Physician Visit Costs



The typical physician office visit costs for Medicare beneficiaries in this area are: $45.84 for a new patient copayment and $26.42 for an established patient copayment.

The pricing information below displays the copayment minimum, maximum and average amount that patients under Medicare are charged when visiting this provider as a new or established patient. Please keep in mind that these prices are just for reference purposes, and the actual prices charged by the provider might be different.

For patients covered under private health plans the prices below are also useful as healthcare pricing for private insurance is usually established as a function of Medicare prices. Private insurance covered patients should check their individual plans to determine the exact pricing.

The prices below reflect the costs for new and established patients in the 60611 ZIP code area.

New Patients Visit Costs *

The most utilized procedure code for new patients office visits is 99205

  • Average New Patient Price $183.39
  • Minimum New Patient Price $60.08
  • Maximum New Patient Price $183.39
  • Average New Patient Copayment $45.84
  • Minimum New Patient Copayment $15.02
  • Maximum New Patient Copayment $45.84

Established Patients Visit Costs *

The most utilized procedure code for established patients office visits is 99214

  • Average Established Patient Price $105.7
  • Minimum Established Patient Price $18.97
  • Maximum Established Patient Price $148.12
  • Average Established Patient Copayment $26.42
  • Minimum Established Patient Copayment $4.74
  • Maximum Established Patient Copayment $37.03

* The physician office visit costs information is generated by statistical analysis of similar providers in the same geographical area. The pricing information above IS NOT the amount charged by this provider.

Overall MIPS Quality Performance

The provider participated in CMS Quality Payment Program under the Merit-based Incentive Payment System (MIPS) and has an overall final score of 94.1, based on four performance areas: quality, improvement activities, promoting interoperability, and cost. The purpose of this information is to help people with Medicare make informed decisions and incentivize doctors and clinicians to maximize performance.

The Merit-based Incentive Payment System (MIPS) is a way providers could use to participate in CMS Quality Payment Program (QPP). The MIPS program affects clinician reimbursement for Part B covered professional services and also rewards them for improving the quality of patient care and outcomes.

  • Final Score: 94.1 out of 100

    The MIPS program evaluates providers across multiple categories with a specific weight for each category resulting a in a MIPS final score that ranges from 0 to 100 points. The MIPS Final Score determines whether providers receive a negative, neutral or positive MIPS payment adjustment.

  • Quality Score: 82.59

    The Quality category assesses providers performance on clinical practices and patient outcomes under the traditional MIPS program. The quality measures help identify the quality of healthcare processes, outcomes, and patient experiences. The Quality measure category compromises 40% providers final MPIS scores.

    There are six collection types for MIPS quality measures: Electronic Clinical Quality Measures (eCQMs), MIPS Clinical Quality Measures (CQMs), Qualified Clinical Data Registry (QCDR) Measures, Medicare Part B claims measures, CMS Web Interface measures and The Consumer Assessment of Healthcare Providers and Systems (CAHPS) for MIPS Survey.

  • Promoting Interoperability Score: 100

    The Interoperability category measures the providers ability to use technology to exchange and make use of healthcare information in a way that is less burdensome and improves outcomes. The Interoperability measure category compromises 25% providers final MPIS scores.

    The MIPS Interoperability measure focuses on the use of certified electronic health record technology (CEHRT) to improve patient access health information, the exchange of information between clinicians and pharmacies and the systematic collection, analysis, and interpretation of healthcare data.

  • Improvement Activities Score: 40

    The Improvement Activities performance category evaluates the providers participation in clinical activities that support the improvement of clinical practice, care delivery, and outcomes. Providers have the option to choose 2 to 4 activities from an inventory of over 100 improvement activities. Providers typically choose the activities that best fit their needs. The improvement activities measure category compromises 15% providers final MPIS scores.

    The Improvement measures aim to better patient engagement, patient safety and other areas of patient care. The Improvement Activities category compromises 15% of providers final MPIS scores.

  • Cost Score: N/A

    The Cost performance category asses the amount and types of services provided and how clinicians coordinate care and seek improvement of health outcomes by ensuring patients receive the appropriate services.

    Although providers don't determine the price of healthcare services they are important in delivering high-quality care at a reasonable cost. The Cost measures category compromises 20% of providers final MPIS scores.

  • Cost Score: N/A

    The Cost performance category asses the amount and types of services provided and how clinicians coordinate care and seek improvement of health outcomes by ensuring patients receive the appropriate services.

    Although providers don't determine the price of healthcare services they are important in delivering high-quality care at a reasonable cost. The Cost measures category compromises 20% of providers final MPIS scores.

Find Provider Hospital Affiliations - Privileges

Doctors and physicians must apply for hospital privileges to treat patients at hospitals. Find out if your doctor has privileges to practice at your preferred hospital by using the hospital affiliation information below based on recent medical claims.

Hospital affiliation is identified through self-reporting data, inpatient, outpatient, physician and ancillary service claims linked by the medical claims NPI number and place of service code. Additionally, to further determine provider hospital affiliation the clinician must have provided services to at least three patients on three different dates in the last 12 months. Leo Gordon is affiliated with the following medical facilities:

Hospital Name Address Phone Hospital Type Overall Rating
NORTHWESTERN MEDICINE MCHENRY4201 MEDICAL CENTER DRIVE
MCHENRY, IL 60050
(815) 344-5000Acute Care Hospitals
NORTHWESTERN LAKE FOREST HOSPITAL1000 N WESTMORELAND ROAD
LAKE FOREST, IL 60045
(847) 234-5600Acute Care Hospitals
NORTHWESTERN MEDICINE CENTRAL DUPAGE HOSPITAL25 NORTH WINFIELD ROAD
WINFIELD, IL 60190
(630) 682-1600Acute Care Hospitals
NORTHWESTERN MEMORIAL HOSPITAL251 E HURON ST
CHICAGO, IL 60611
(312) 926-2000Acute Care Hospitals

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NPI NPI Number Validation

How NPI Validation Works

The NPI validation process uses the ISO-standard Luhn algorithm, a mathematical "handshake", to ensure that a provider's 10-digit ID is authentic and free of common typing errors.

To verify the NPI 1821028499, we treat the final digit (9) as the Check Digit—the target answer we need to reach. The process begins by taking the first nine digits and adding a constant value of 24, which accounts for the "80840" prefix required for all U.S. health identifiers. We then double every other digit starting from the right and sum the individual digits of those results together. For this specific NPI, that total comes to 61. The final step is to find the difference between that total and the next multiple of ten (70 - 61 = 9).

Digit-by-digit view

Use the first nine digits for the calculation. Starting from the right, double every other digit. The last digit is the check digit and is not part of the calculation.

Pos 1
1
Doubled → 2
Pos 2
8
Unchanged
Pos 3
2
Doubled → 4
Pos 4
1
Unchanged
Pos 5
0
Doubled → 0
Pos 6
2
Unchanged
Pos 7
8
Doubled → 16 → 1 + 6
Pos 8
4
Unchanged
Pos 9
9
Doubled → 18 → 1 + 8
Check
9
Target digit
Regular digit Doubled digit Check digit

Step 1: Double every other digit from the right

Starting with the rightmost digit of the first nine digits, double every other value. If doubling creates a two-digit number, add those digits together.

1 → 2 2 → 4 0 → 0 8 → 16 → 7 9 → 18 → 9

Step 2: Add all digits plus the NPI constant

Add the transformed values, the unchanged digits, and the constant 24.

2 + 8 + 4 + 1 + 0 + 2 + 1 + 6 + 4 + 1 + 8 + 24 = 61

Step 3: Find the amount needed to reach the next multiple of 10

The next multiple of ten after 61 is 70. The difference is the calculated check digit.

70 - 61 = 9
This NPI is valid
The calculated check digit is 9, which matches the last digit of 1821028499.

Other Providers at the Same Location


The following 20 providers are registered at the same or a nearby location.

Internal Medicine (Hematology)
675 N SAINT CLAIR ST, SUITE 21-100
CHICAGO, IL 60611
Internal Medicine
675 N SAINT CLAIR ST, SUITE 18-200
CHICAGO, IL 60611
Surgery (Surgical Oncology)
675 N SAINT CLAIR ST, SUITE 100
CHICAGO, IL 60611
Allergy & Immunology
675 N SAINT CLAIR ST, STE 18-250
CHICAGO, IL 60611
Internal Medicine
675 N SAINT CLAIR ST, GALTER 18-#200
CHICAGO, IL 60611
Internal Medicine
675 N SAINT CLAIR ST
CHICAGO, IL 60611
Internal Medicine (Nephrology)
675 N SAINT CLAIR ST, SUITE #250
CHICAGO, IL 60611
Obstetrics & Gynecology (Reproductive Endocrinology)
675 N SAINT CLAIR ST, SUITE #200
CHICAGO, IL 60611
Social Worker (Clinical)
675 N SAINT CLAIR ST, GALTER 20-100
CHICAGO, IL 60611
Internal Medicine
675 N SAINT CLAIR ST, GALTER 18-200
CHICAGO, IL 60611
Internal Medicine (Medical Oncology)
675 N SAINT CLAIR ST, SUITE 100
CHICAGO, IL 60611
Internal Medicine (Medical Oncology)
675 N SAINT CLAIR ST, GALTER 21-100
CHICAGO, IL 60611
Anesthesiology (Pain Medicine)
675 N SAINT CLAIR ST, SUITE 100
CHICAGO, IL 60611
Internal Medicine (Cardiovascular Disease)
675 N SAINT CLAIR ST, GALTER 19-100
CHICAGO, IL 60611
Surgery (Vascular Surgery)
675 N SAINT CLAIR ST, NORTHWESTERN MEMORIAL HOSPIALT GALTER 19-100
CHICAGO, IL 60611
Physician Assistant
675 N SAINT CLAIR ST, GALTER 21-100
CHICAGO, IL 60611
Obstetrics & Gynecology (Reproductive Endocrinology)
675 N SAINT CLAIR ST, GALTER 14-200
CHICAGO, IL 60611
Ophthalmology
675 N SAINT CLAIR ST, GALTER 15-150
CHICAGO, IL 60611
Internal Medicine (Pulmonary Disease)
675 N SAINT CLAIR ST, GALTER 18-250
CHICAGO, IL 60611
Urology
675 N SAINT CLAIR ST, GALTER 17-250
CHICAGO, IL 60611

Frequently Asked Questions

The NPI number assigned to this healthcare provider is 1821028499, enumerated as an "individual" on July 03, 2006.

The provider is located at 675 N SAINT CLAIR ST GALTER 21-100 CHICAGO, IL 60611 and the phone number is (312) 695-0990.

Internal Medicine with taxonomy code 207RH0003X and a focus in Hematology & Oncology.

Leo Gordon is affiliated with: NORTHWESTERN MEDICINE MCHENRY, NORTHWESTERN LAKE FOREST HOSPITAL, NORTHWESTERN MEDICINE CENTRAL DUPAGE HOSPITAL and NORTHWESTERN MEMORIAL HOSPITAL.