LEONARD A GROSSMAN M.D.
NPI 1578600136
Internal Medicine - Rheumatology in Princeton, NJ

NPI Status: Active since January 31, 2007

Contact Information

419 N HARRISON ST
PRINCETON, NJ
ZIP 08540
Phone: (609) 924-9300
Fax: (609) 430-9481

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  • Individual
  • Male
  • Internal Medicine
  • Rheumatology

About LEONARD GROSSMAN

This page provides the complete NPI Profile along with additional information for Leonard Grossman, an internist established in Princeton, New Jersey with a medical specialization in Internal Medicine, focusing in rheumatology . The healthcare provider is registered in the NPI registry with number 1578600136 assigned on January 2007. The practitioner's primary taxonomy code is 207RR0500X with license number 25MA03747400 (NJ). The provider is registered as an individual and his NPI record was last updated 18 years ago.

NPI
1578600136
Provider Name
LEONARD A GROSSMAN M.D.
Gender
Male
Entity Type
Individual
Location Address
419 N HARRISON ST PRINCETON, NJ 08540
Location Phone
(609) 924-9300
Location Fax
(609) 430-9481
Mailing Address
419 N HARRISON ST PRINCETON, NJ 08540
Mailing Phone
(609) 924-9300
Mailing Fax
(609) 430-9481
Is Sole Proprietor?
No
Enumeration Date
01-31-2007
Last Update Date
03-12-2008
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An internist like Leonard Grossman 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 Rheumatology

Taxonomy Code
207RR0500X
Type
Allopathic & Osteopathic Physicians
License No.
25MA03747400
License State
NJ
Taxonomy Description
An internist who treats diseases of joints, muscle, bones and tendons. This specialist diagnoses and treats arthritis, back pain, muscle strains, common athletic injuries and collagen diseases.

Insurance Plans Accepted

According to publicly available information the provider might be accepting the following health plans from these health insurance companies:

Specific plan information not avaialable, please contact the provider to verify if your insurance plan is accepted.

Specific plan information not avaialable, please contact the provider to verify if your insurance plan is accepted.

Specific plan information not avaialable, please contact the provider to verify if your insurance plan is accepted.

Specific plan information not avaialable, please contact the provider to verify if your insurance plan is accepted.

*Please verify directly with this provider to make sure your insurance plan is currently accepted.

Additional Identifiers

The NPI Enumerator encourages providers to submit additional identifiers with their NPI application although the submission of this information is optional. The additional identifier(s) section includes other numbers or codes currently or formerly used as an identifier for the provider by other public healthcare entities. The identifiers may include UPIN, NSC, OSCAR, DEA, Medicaid State or PIN identification numbers.

Identifier Type / Code Identifier State Identifier Issuer
1651404MEDICAID (05)NJ 
597405AP0MEDICARE PIN (08)NJ 
1547974OTHER (01)UNITED HEALTH CARE
P441630OTHER (01)OXFORD PCP
E39380MEDICARE UPIN (02) 
P1308108OTHER (01)OXFORD SPECIALTY
0419803000OTHER (01)AMERIHLTH IBC PCP SPEC.
597405OTHER (01)AMERIHLTH ADMIN PCP SPEC
854535OTHER (01)AETNA PCP
2195157OTHER (01)AETNA SPECIALTY

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.

Blood test, comprehensive group of blood chemicals

A comprehensive group of blood chemicals test, also known as a comprehensive metabolic panel, is a blood test that measures your sugar level, electrolyte and fluid balance, kidney function, and liver function. This helps to check your body's overall health.

This service was performed 71 times for 40 patients

Complete blood cell count (red cells, white blood cell, platelets), automated test and automated differential white blood cell count

A Complete Blood Cell Count is a common test that measures various components of the blood, including red cells (carry oxygen), white cells (fight infection), and platelets (help blood clot). An automated test ensures accuracy. The differential count provides detailed information about white cell types.

This service was performed 87 times for 46 patients

Established patient office or other outpatient visit, 20-29 minutes

This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.

This service was performed 129 times for 67 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 147 times for 66 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 45 times for 18 patients

Injection, denosumab, 1 mg

Denosumab is a medication given via injection to strengthen your bones. It works by slowing down the cells that break down bone, improving bone density and reducing the risk of fractures. It's often used for osteoporosis treatment.

This service was performed 2,040 times for 18 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 117 times for 57 patients

Red blood cell sedimentation rate, to detect inflammation, non-automated

The Red Blood Cell Sedimentation Rate test measures how quickly red blood cells settle at the bottom of a test tube. If they settle faster than normal, it may indicate inflammation in the body. This test is non-automated, meaning it's manually performed by a lab technician.

This service was performed 67 times for 39 patients

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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 1578600136, we treat the final digit (6) 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 54. The final step is to find the difference between that total and the next multiple of ten (60 - 54 = 6).

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
5
Unchanged
Pos 3
7
Doubled → 14 → 1 + 4
Pos 4
8
Unchanged
Pos 5
6
Doubled → 12 → 1 + 2
Pos 6
0
Unchanged
Pos 7
0
Doubled → 0
Pos 8
1
Unchanged
Pos 9
3
Doubled → 6
Check
6
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 7 → 14 → 5 6 → 12 → 3 0 → 0 3 → 6

Step 2: Add all digits plus the NPI constant

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

2 + 5 + 1 + 4 + 8 + 1 + 2 + 0 + 0 + 1 + 6 + 24 = 54

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

The next multiple of ten after 54 is 60. The difference is the calculated check digit.

60 - 54 = 6
This NPI is valid
The calculated check digit is 6, which matches the last digit of 1578600136.

Other Providers at the Same Location


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

Specialist
419 N HARRISON ST
PRINCETON, NJ 08540
Neurological Surgery
419 N HARRISON ST, SUITE 204
PRINCETON, NJ 08540
Internal Medicine (Nephrology)
419 N HARRISON ST, SUITE 101
PRINCETON, NJ 08540
Internal Medicine
419 N HARRISON ST, SUITE 101
PRINCETON, NJ 08540
Obstetrics & Gynecology (Gynecology)
419 N HARRISON ST, SUITE 201
PRINCETON, NJ 08540
Obstetrics & Gynecology
419 N HARRISON ST, SUITE 201
PRINCETON, NJ 08540
Obstetrics & Gynecology
419 N HARRISON ST, SUITE 201
PRINCETON, NJ 08540
Dermatology
419 N HARRISON ST, SUITE 201
PRINCETON, NJ 08540
Dermatology
419 N HARRISON ST, SUITE 201
PRINCETON, NJ 08540
Internal Medicine (Cardiovascular Disease)
419 N HARRISON ST
PRINCETON, NJ 08540
Internal Medicine (Pulmonary Disease)
419 N HARRISON ST
PRINCETON, NJ 08540
Internal Medicine (Medical Oncology)
419 N HARRISON ST, SUITE 101
PRINCETON, NJ 08540
Psychiatry & Neurology (Psychiatry)
419 N HARRISON ST, SUITE 206
PRINCETON, NJ 08540
Technician/Technologist (Optician)
419 N HARRISON ST, SUITE 104
PRINCETON, NJ 08540
Ophthalmology
419 N HARRISON ST, SUITE 104
PRINCETON, NJ 08540
Internal Medicine
419 N HARRISON ST
PRINCETON, NJ 08540
Internal Medicine (Endocrinology, Diabetes & Metabolism)
419 N HARRISON ST
PRINCETON, NJ 08540
Internal Medicine (Endocrinology, Diabetes & Metabolism)
419 N HARRISON ST
PRINCETON, NJ 08540
Nurse Practitioner (Primary Care)
419 N HARRISON ST
PRINCETON, NJ 08540
Obstetrics & Gynecology
419 N HARRISON ST
PRINCETON, NJ 08540

Frequently Asked Questions

The NPI number assigned to this healthcare provider is 1578600136, enumerated as an "individual" on January 31, 2007.

The provider is located at 419 N HARRISON ST PRINCETON, NJ 08540 and the phone number is (609) 924-9300.

Internal Medicine with taxonomy code 207RR0500X and a focus in Rheumatology.

The provider might be accepting Accepts: Medicare, Medicaid, Oxford Health Plans and Aetna. Please consult your insurance carrier or call the provider to verify.