DR. ELENI NICOLE NACKOS MD
NPI 1023339819
Internal Medicine - Hematology & Oncology in Westbrook, ME

NPI Status: Active since June 16, 2010

Contact Information

11 ROCK ROW STE 320
WESTBROOK, ME
ZIP 04092
Phone: (207) 303-3300
Fax: (207) 250-2139

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  • Individual
  • Female
  • Years of Experience 16
  • Internal Medicine
  • Hematology & Oncology
  • Accepts Insurance
  • Accepts Medicare Approved Payment
  • PECOS Enrolled

About ELENI NACKOS

This page provides the complete NPI Profile along with additional information for Eleni Nackos, an internist established in Westbrook, Maine with a medical specialization in Internal Medicine, focusing in hematology & oncology and more than 16 years of experience. The healthcare provider is registered in the NPI registry with number 1023339819 assigned on June 2010. The practitioner's primary taxonomy code is 207RH0003X with license number MD21087 (ME). The provider is registered as an individual and her NPI record was last updated April 2026.

NPI
1023339819
Provider Name
DR. ELENI NICOLE NACKOS MD
Gender
Female
Entity Type
Individual
Location Address
11 ROCK ROW STE 320 WESTBROOK, ME 04092
Location Phone
(207) 303-3300
Location Fax
(207) 250-2139
Mailing Address
PO BOX 911 BRATTLEBORO, VT 05302
Mailing Phone
(207) 303-3200
Mailing Fax
(207) 250-2139
Medical School Name
OTHER
Graduation Year
2010
Is Sole Proprietor?
No
Enumeration Date
06-16-2010
Last Update Date
04-20-2026
Code Navigator

An internist like Eleni Nackos 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

Secondary Locations

  • 15 Rock Row Ste 110
    Westbrook, ME 04092
    (207) 303-3300
  • 155 Borthwick Ave Ste C
    Portsmouth, NH 03801
    (603) 828-0100
  • 11 Rock Row Ste 150
    Westbrook, ME 04092
    (207) 303-3300
  • 11 Rock Row Ste 120
    Westbrook, ME 04092
    (207) 303-3300
  • 105 Topsham Fair Mall Rd Unit 1
    Topsham, ME 04086
    (207) 303-3300
  • 2 Independence Dr
    Kennebunk, ME 04043
    (207) 303-3300

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.
MD21087
License State
ME
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)
1207RH0003XAllopathic & Osteopathic Physicians

Internal Medicine
Hematology & Oncology

20349 (NH)

Insurance Plans Accepted

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

  • Choice Bronze HSA - EPO
  • Choice Bronze HSA + Vision + Adult Dental - EPO
  • Clear Silver - EPO
  • Clear Silver + Vision + Adult Dental - EPO
  • Complete Gold - EPO
  • Complete Gold + Vision + Adult Dental - EPO
  • Complete Silver - EPO
  • Complete Silver + Vision + Adult Dental - EPO
  • Elite Bronze - EPO
  • Elite Bronze + Vision + Adult Dental - EPO
  • Everyday Gold - EPO
  • Everyday Gold + Vision + Adult Dental - EPO
  • Standard Expanded Bronze - EPO
  • Standard Expanded Bronze + Vision + Adult Dental - EPO
  • Standard Gold - EPO
  • Standard Gold + Vision + Adult Dental - EPO
  • Standard Silver - EPO
  • Standard Silver + Vision + Adult Dental - EPO
  • Anthem Bronze Pathway X Enhanced 6000/35% HSA - HMO
  • Anthem Bronze Pathway X Enhanced 7000/0% ($0 Virtual PCP + $0 Select Drugs) - HMO
  • Anthem Bronze Pathway X Enhanced 7500/50% ($0 Virtual PCP + $0 Select Drugs) Standard - HMO
  • Anthem Catastrophic Pathway X Enhanced - HMO
  • Anthem Gold Pathway X Enhanced 1200/20% ($0 Virtual PCP + $0 Select Drugs) - HMO
  • Anthem Gold Pathway X Enhanced 2000/25% ($0 Virtual PCP + $0 Select Drug) Standard - HMO
  • Anthem Gold Pathway X Enhanced 700/40% ($0 Virtual PCP + $0 Select Drugs) - HMO
  • Anthem Heart Healthy Bronze Pathway X Enhanced 6000/40% ($0 Virtual PCP + $0 Select Drugs) - HMO
  • Anthem Heart Healthy Silver Pathway X Enhanced 4000/0% ($0 Virtual PCP + $0 Select Drugs) - HMO
  • Anthem Silver Pathway X Enhanced 4500/20% HSA - HMO
  • Anthem Silver Pathway X Enhanced 5500/20% ($0 Virtual PCP + $0 Select Drugs) - HMO
  • Anthem Silver Pathway X Enhanced 6000/40% ($0 Virtual PCP + $0 Select Drugs) Standard - HMO
  • Anthem Bronze Access Blue New England HMO 6000/20%/8000 w/HSA - HMO
  • Anthem Bronze Access Blue New England HMO 7000/50%/8000 w/HSA - HMO
  • Anthem Bronze Access Blue New England HMO 7500/30%/10000 Value - HMO
  • Anthem Bronze Access Blue New England HMO 8500/50%/9200 - HMO
  • Anthem Bronze Pathway X HMO 6000/20%/8000 w/HSA - HMO
  • Anthem Bronze Pathway X HMO 7000/50%/8000 w/HSA - HMO
  • Anthem Bronze Pathway X HMO 7500/30%/10000 Value - HMO
  • Anthem Bronze Pathway X HMO 8500/50%/9200 - HMO
  • WellSense Clarity NH Bronze 6500 HSA + $0 Rx List + 24/7 Nurse Advice - HMO
  • WellSense Clarity NH Bronze 7500 HSA + $0 Rx List + 24/7 Nurse Advice - HMO
  • WellSense Clarity NH Bronze 7600 HSA + $0 Rx List + 24/7 Nurse Advice - HMO
  • WellSense Clarity NH Gold 2000 + $0 Rx List + 24/7 Nurse Advice - HMO
  • WellSense Clarity NH Silver 0 Deductible + $0 Rx List + 24/7 Nurse Advice - HMO
  • WellSense Clarity NH Silver 3400 + $0 Rx List + 24/7 Nurse Advice - HMO
  • WellSense Clarity NH Silver 6000 + $0 Rx List + 24/7 Nurse Advice - HMO

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

Medicare Participation & PECOS Enrollment Status

Eleni Nackos 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.

Eleni Nackos 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: 8527287556

    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: I20160603001608, I20200323000231

    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

Provider Referred Orders for Durable Medical Equipment, Devices & Supplies

The following list reflects the services, supplies or durable medical equipment ordered by this provider to a DME supplier on behalf of patients. The information below is derived from Medicare claims data and reflects the BETOS category, HCPCS code information and the number times each service was submitted under the Medicare fee-for-service program.

Unknown

  • Treatment-Treatment - Miscellaneous (RX029N)

    Capecitabine, oral, 500 mg (HCPCS:J8521)

    2 DME suppliers used 32 Medicare Claims 1638 Services Paid

  • Treatment-Chemotherapy (RH012N)

    Pharmacy supply fee for oral anti-cancer, oral anti-emetic or immunosuppressive drug(s); for the first prescription in a 30-day period (HCPCS:Q0511)

    1 DME suppliers used 26 Medicare Claims 26 Services Paid

Orthotic Devices

  • DME-Orthotic Devices (DF000N)

    Breast prosthesis, mastectomy bra, without integrated breast prosthesis form, any size, any type (HCPCS:L8000)

    3 DME suppliers used 13 Medicare Claims 29 Services Paid

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, 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 80 times for 14 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 192 times for 49 patients

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

This procedure involves the injection of hormone-based anti-cancer drugs under the skin or into a muscle. These medications help to slow down or stop the growth of certain types of cancer cells. The process is usually quick and can be performed in a clinic or hospital.

This service was performed 65 times for 18 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 11 times for 11 patients

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 629 times for 284 patients

Blood test, lipids (cholesterol and triglycerides)

A lipid panel is a blood test that measures fats and fatty substances, such as cholesterol and triglycerides. These substances are used by your body as a source of energy. High levels can lead to health issues, including heart disease.

This service was performed 23 times for 21 patients

Blood test, thyroid stimulating hormone (tsh)

A TSH blood test measures the level of thyroid stimulating hormone in your body. This hormone is produced by the pituitary gland and regulates how your thyroid works. It's a simple procedure where a small amount of blood is drawn from your arm for analysis.

This service was performed 35 times for 26 patients

Carcinoembryonic antigen (cea) protein level

Carcinoembryonic Antigen (CEA) protein level is a blood test often used in cancer care. It measures the amount of CEA protein in your blood, which can increase in cases of certain types of cancer. It's used to monitor treatment progress and check for cancer recurrence.

This service was performed 15 times for 14 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 621 times for 277 patients

Cyanocobalamin (vitamin b-12) level

A Cyanocobalamin (Vitamin B-12) level test is a blood test that checks the amount of Vitamin B-12 in your body. This vitamin is vital for nerve function and the creation of red blood cells. Low or high levels could indicate a potential health issue.

This service was performed 13 times for 11 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 108 times for 104 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 461 times for 221 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 134 times for 65 patients

Ferritin (blood protein) level

A Ferritin level test measures the amount of ferritin, a protein that stores iron, in your blood. It helps determine how much iron your body is storing. If levels are low, it may indicate iron deficiency, while high levels could signify conditions like iron overload.

This service was performed 37 times for 25 patients

Folic acid level, serum

A Folic Acid Level, Serum test measures the amount of folic acid, a type of B vitamin, in your blood. This vitamin is important for cell growth and development. It's crucial for your body to function well. If your levels are low, it may indicate a deficiency, which can lead to health issues.

This service was performed 13 times for 11 patients

Immunologic analysis for detection of tumor antigen, quantitative; ca 15-3

This is a blood test that measures the level of CA 15-3, a protein often higher in individuals with certain types of cancer. It helps monitor response to treatment and check for cancer recurrence. It's not a standalone diagnostic test but used alongside other evaluations.

This service was performed 242 times for 126 patients

Influenza vaccine split virus, preservative free

The Influenza Vaccine Split Virus, preservative-free, is a flu shot to protect against the influenza virus. It is made from parts of inactivated flu viruses and doesn't contain preservatives, reducing potential side effects. It helps your body develop immunity to the flu.

This service was performed 11 times for 11 patients

Infusion into a vein for hydration, each additional hour

This procedure involves delivering fluids directly into your vein to keep your body hydrated. It is typically done when oral hydration is insufficient. Each additional hour means more fluid is infused to ensure adequate hydration.

This service was performed 35 times for 18 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 65 times for 42 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 25 times for 12 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 30 times for 12 patients

Infusion, normal saline solution , 1000 cc

An infusion of normal saline solution, 1000 cc, is a common medical procedure. It involves introducing a saltwater solution into your bloodstream via an intravenous (IV) line. This helps to hydrate your body, correct electrolyte imbalances, and deliver medications if needed.

This service was performed 39 times for 18 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 191 times for 40 patients

Injection of drug or substance into vein

This procedure involves introducing a medication or substance directly into your vein using a syringe. It's a quick and efficient way to deliver treatment throughout your body. You might feel a small prick when the needle enters. It's generally safe and effective.

This service was performed 18 times for 11 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 65 times for 35 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 2,340 times for 17 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 706 times for 28 patients

Injection, fulvestrant, 25 mg

Fulvestrant is an injectable medication used to manage certain types of conditions. It works by blocking the effect of a natural substance in your body. The 25 mg dosage refers to the amount of active substance in each injection.

This service was performed 630 times for 14 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 460 times for 15 patients

Injection, zoledronic acid, 1 mg

Zoledronic acid is a medication given via injection to strengthen bones. It's often used in patients with osteoporosis or certain types of cancer. The injection helps reduce the risk of fractures and other bone complications.

This service was performed 131 times for 22 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 521 times for 273 patients

Iron binding capacity

Iron binding capacity is a blood test that measures how well your body can bind and transport iron. This helps your healthcare provider assess if your body has too little or too much iron, which can indicate certain health conditions.

This service was performed 36 times for 25 patients

Iron level

An iron level test measures the amount of iron in your blood. Iron is crucial for producing hemoglobin, a protein in red blood cells that carries oxygen throughout your body. This test helps identify iron deficiencies or excesses, which can lead to conditions like anemia or hemochromatosis.

This service was performed 36 times for 25 patients

Magnesium level

A magnesium level test is a simple blood test that measures the amount of magnesium in your body. Magnesium is a crucial mineral that helps your nerves, muscles, and heart function properly. The test can help detect health conditions like kidney disease or malnutrition.

This service was performed 35 times for 25 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 46 times for 46 patients

Phosphate level

A phosphate level test measures the amount of phosphate in your blood. Phosphate is a chemical that contains the mineral phosphorus, crucial for energy production, muscle and nerve function, and bone growth. Imbalances may indicate kidney disease or other health issues.

This service was performed 20 times for 17 patients

Telephone medical discussion with physician, 5-10 minutes

A telephone medical discussion with a physician is a brief, 5-10 minute call where you can discuss your health concerns. It's a convenient way to receive medical advice without needing to visit a clinic. It's important to prepare questions in advance to make the most of this time.

This service was performed 12 times for 11 patients

Vitamin d-3 level

A Vitamin D-3 level test measures the amount of Vitamin D-3, a crucial nutrient, in your body. This test helps identify if your levels are too low or too high. Low levels may lead to bone weakness, while high levels could harm your kidneys. It's a simple blood test.

This service was performed 60 times for 53 patients

Physician Visit Costs



The typical physician office visit costs for Medicare beneficiaries in this area are: $42.49 for a new patient copayment and $24.79 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 04092 ZIP code area.

New Patients Visit Costs *

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

  • Average New Patient Price $169.96
  • Minimum New Patient Price $56.28
  • Maximum New Patient Price $169.96
  • Average New Patient Copayment $42.49
  • Minimum New Patient Copayment $14.07
  • Maximum New Patient Copayment $42.49

Established Patients Visit Costs *

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

  • Average Established Patient Price $99.18
  • Minimum Established Patient Price $18.22
  • Maximum Established Patient Price $138.92
  • Average Established Patient Copayment $24.79
  • Minimum Established Patient Copayment $4.55
  • Maximum Established Patient Copayment $34.73

* 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.

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. Eleni Nackos is affiliated with the following medical facilities:

Hospital Name Address Phone Hospital Type Overall Rating
NORTHERN LIGHT HEALTH144 STATE STREET
PORTLAND, ME 04101
(207) 879-3000Acute Care Hospitals
MAINE MEDICAL CENTER22 BRAMHALL ST
PORTLAND, ME 04102
(207) 662-0111Acute Care Hospitals
MID COAST HOSPITAL123 MEDICAL CENTER DRIVE
BRUNSWICK, ME 04011
(207) 729-0181Acute Care Hospitals
MAINE GENERAL MEDICAL CENTER35 MEDICAL CENTER PARKWAY
AUGUSTA, ME 04330
(207) 626-1000Acute Care Hospitals
STEPHENS MEMORIAL HOSPITAL181 MAIN STREET
NORWAY, ME 04268
(207) 743-5933Critical Access 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 1023339819, 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
0
Unchanged
Pos 3
2
Doubled → 4
Pos 4
3
Unchanged
Pos 5
3
Doubled → 6
Pos 6
3
Unchanged
Pos 7
9
Doubled → 18 → 1 + 8
Pos 8
8
Unchanged
Pos 9
1
Doubled → 2
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 3 → 6 9 → 18 → 9 1 → 2

Step 2: Add all digits plus the NPI constant

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

2 + 0 + 4 + 3 + 6 + 3 + 1 + 8 + 8 + 2 + 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 1023339819.

Other Providers at the Same Location


The following 15 providers are registered at the same or a nearby location.

Internal Medicine
11 ROCK ROW STE 320
WESTBROOK, ME 04092
Surgery (Surgical Oncology)
11 ROCK ROW STE 320
WESTBROOK, ME 04092
Nurse Practitioner
11 ROCK ROW STE 320
WESTBROOK, ME 04092
Internal Medicine (Hematology & Oncology)
11 ROCK ROW STE 320
WESTBROOK, ME 04092
Physician Assistant (Surgical)
11 ROCK ROW STE 320
WESTBROOK, ME 04092
Surgery (Surgical Oncology)
11 ROCK ROW STE 320
WESTBROOK, ME 04092
Social Worker (Clinical)
11 ROCK ROW STE 320
WESTBROOK, ME 04092
Physician Assistant
11 ROCK ROW STE 320
WESTBROOK, ME 04092
Nurse Practitioner (Family)
11 ROCK ROW STE 320
WESTBROOK, ME 04092
Nurse Practitioner (Family)
11 ROCK ROW STE 320
WESTBROOK, ME 04092
Dietitian, Registered
11 ROCK ROW STE 320
WESTBROOK, ME 04092
Nurse Practitioner
11 ROCK ROW STE 320
WESTBROOK, ME 04092
Nurse Practitioner (Family)
11 ROCK ROW STE 320
WESTBROOK, ME 04092
Internal Medicine (Hematology & Oncology)
11 ROCK ROW STE 320
WESTBROOK, ME 04092
Dietitian, Registered
11 ROCK ROW STE 320
WESTBROOK, ME 04092

Frequently Asked Questions

The NPI number assigned to this healthcare provider is 1023339819, enumerated as an "individual" on June 16, 2010.

The provider is located at 11 ROCK ROW STE 320 WESTBROOK, ME 04092 and the phone number is (207) 303-3300.

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

The provider might be accepting Accepts: Ambetter from NH Healthy Families, Anthem Blue. Please consult your insurance carrier or call the provider to verify.

Eleni Nackos is affiliated with: NORTHERN LIGHT HEALTH, MAINE MEDICAL CENTER, MID COAST HOSPITAL, MAINE GENERAL MEDICAL CENTER and STEPHENS MEMORIAL HOSPITAL.