Eleni Nicole Nackos, MD
Hematology & Oncology Physician · Westbrook, ME
Eleni Nicole Nackos, MD is a hematology & oncology physician with a practice address in Westbrook, Maine, and NPI 1023339819, issued on Jun 16, 2010. Check the license (Maine MD21087, as entered in NPPES) on the Maine Board of Licensure in Medicine; the Medicare figures below come from public CMS files.
- Name
- Eleni Nicole Nackos
- Credential
- MD
- Primary taxonomy
- Hematology & Oncology Physician 207RH0003X
- License numbers
- MD21087 ME
20349 NH
Self-reported in NPPES; status is on the state search - Practice location
- 11 Rock Row Ste 320, Westbrook, ME 04092
- Phone
- (207) 303-3300
- Enumerated
- Jun 16, 2010
- Record last updated
- Apr 20, 2026
- Fax
- (207) 250-2139
- Medicare enrollment
- Enrolled (PECOS I20160603001608); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest hematology & oncology physician records → All 77 in Maine → Look up another NPI →
Also registered at 11 Rock Row Ste 320
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Chiara Battelli, MDHematology & Oncology Physician1831398551
- Laurel Costello, MS, RD, LDRegistered Dietitian1558161331
- Elizabeth Dennis, D.O.Internal Medicine Physician1073714721
- Lauren Hampson, MSN, APRN, FNP-CFamily Nurse Practitioner1285287813
- Chelsea Hardy, RDRegistered Dietitian1952932402
- Dixie Knoll, NPFamily Nurse Practitioner1235330390
Verify Eleni Nicole Nackos in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMaine Board of Licensure in Medicine
Search for license MD21087Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2.0 times the Medicare Part D claims of the average hematology & oncology physician in 2024
1,754 Medicare Part D claims for 373 beneficiaries, against an average of 877 among the 10,784 providers of this specialty who prescribed in Part D.
Most prescribed
- Letrozole458 claims
- Anastrozole342 claims
- Tamoxifen Citrate133 claims
- Ibrance96 claims
- Verzenio74 claims
- Exemestane71 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Industry payments in 2024: $3,485.27
6 payments; by number, the most common kind was food and beverage; the largest payer was Pfizer Inc. The 8,560 providers of this specialty with any payment received $7,481.41 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Maine Center For Cancer Medicine And Blood Disorders PAWestbrook, ME
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Eleni Nicole Nackos among 77 hematology & oncology physician records in Maine
Eleni Nicole Nackos, MD is one of 77 hematology & oncology physician records with a practice address in Maine. 82% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2010, is newer than 60% of them.
- NPI issued2010 · 60% of these records are older, 36% newer
- In a Medicare fileYes · 82% of these records are
- In the CMS Doctors and Clinicians fileYes · 69% of these records are
- Graduated2010 · median 2006 among the 53 with a school on file
- Record last updated2026 · 42% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RH0003X and a Maine practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
10 hematology & oncology physician records list a practice address in Westbrook
They are 10 of the 559 NPPES records with a practice address in Westbrook, and 77 hematology & oncology physician records in Maine.
All 77 in Maine → Every provider in Westbrook → Hematology & Oncology Physician nationwide →
The 8 hematology & oncology physician records with the nearest ZIP codes
- Chiara Battelli, MDWestbrook, ME 040921831398551
- Patrick Boland, MDWestbrook, ME 040921083140883
- Matthew Dugan, D.O.Westbrook, ME 040921386614295
- Devon Evans, MDWestbrook, ME 040921518183532
- Owen Pickus, D.O.Westbrook, ME 040921174565667
- Daniel Rausch, MDWestbrook, ME 040921649478827
- Christian Thomas, MDWestbrook, ME 040921487651584
- Tracey Weisberg, MDWestbrook, ME 040921871564724
Common questions
What is Eleni Nicole Nackos, MD's NPI number?
Eleni Nicole Nackos, MD's National Provider Identifier (NPI) is 1023339819, issued on Jun 16, 2010. An NPI identifies a provider in billing; it is not a license.
Where is Eleni Nicole Nackos, MD located?
The NPPES record lists a practice address at 11 Rock Row Ste 320, Westbrook, ME, 04092. Phone: (207) 303-3300. Providers update this record themselves, so call before visiting.
How can I verify Eleni Nicole Nackos, MD's license?
NPPES lists Maine license number MD21087, as entered by the provider. Search the Maine Board of Licensure in Medicine at https://www.maine.gov/md/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Eleni Nicole Nackos, MD prescribe under Medicare Part D?
In 2024, Eleni Nicole Nackos, MD had 1,754 Medicare Part D claims for 373 beneficiaries; the average among hematology & oncology physician prescribers was 877. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.