Registry data as of Aug 27, 2026

Maria Constantinou, MD

Hematology & Oncology Physician · Providence, RI

Maria Constantinou, MD is a hematology & oncology physician with a practice address in Providence, Rhode Island, and NPI 1407999444, issued on Feb 15, 2007. Check the license (Rhode Island MD10436, as entered in NPPES) on the Rhode Island Board of Medical Licensure and Discipline; the Medicare figures below come from public CMS files.

Record from CMS NPPES, loaded Aug 27, 2026 · Medicare files 2023 and 2024 · method · Verify with CMS →

NPPES recordas of Aug 27, 2026
1407999444
Name
Maria Constantinou
Credential
MD
Primary taxonomy
Hematology & Oncology Physician 207RH0003X
License number
MD10436 RI
Self-reported in NPPES; status is on the state search
Practice location
593 Eddy St, Providence, RI 02903
Phone
(401) 444-5396
Enumerated
Feb 15, 2007
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). A record is not a license: verify it with the state board.
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Also registered at 593 Eddy St

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Farah AbazaStudent in an Organized Health Care Education/Training Program1598437477
  2. Nilofar Abdul ShukurPhysician Assistant1336010529
  3. Hael Abdulrazeq, MDNeurological Surgery Physician1659934289
  4. James Abernathy, MDAnesthesiology Physician1942257217
  5. Karen Abi Chebl, MDStudent in an Organized Health Care Education/Training Program1255179552
  6. Georges Abi Roustom, MDAnesthesiology Physician1548871908

Verify Maria Constantinou in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersRhode Island Board of Medical Licensure and Discipline
    Search for license MD10436    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS, AOA, NCCPA, AANPNot checked
Open the Rhode Island license search

PlainDoctor does not match the HHS-OIG exclusion list to individual records: most entries carry no NPI. Search the OIG exclusion list by name.

59% fewer Medicare Part D claims than the average hematology & oncology physician in 2024

359 Medicare Part D claims for 116 beneficiaries, against an average of 885 among the 8,428 providers of this specialty who prescribed in Part D. Brand-name drugs were 9% of claims.

  1. Maria Constantinou359
  2. Specialty average885

Most prescribed

  1. Anastrozole57 claims
  2. Letrozole51 claims
  3. Ondansetron Hcl26 claims
  4. Prednisone26 claims
  5. Triamcinolone Acetonide21 claims
  6. Alendronate Sodium14 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.

One hospital or facility affiliation

  1. Rhode Island HospitalEast Greenwich, RI · Acute Care Hospitals4 of 5 stars

Source: CMS Doctors and Clinicians affiliations; Hospital General Information (Care Compare) (data.cms.gov). Star ratings are CMS hospital ratings, not ratings of this provider.

Hematology & Oncology Physician providers in Rhode Island

There are 65 hematology & oncology physician records in Rhode Island.

All 65 in Rhode Island → Every provider in Providence →

Other hematology & oncology physician records in Rhode Island

  1. Hussein Abu-Hashish, MDProvidence, RI1154908093
  2. Khaja Ahmed, MD, CHEProvidence, RI1851308209
  3. Muhammad Akhtar, M.D.East Providence, RI1548238918
  4. Ogheneyoma Akpoviroro-Sauers, MDProvidence, RI1275111676
  5. Sylvia Alarcon Velasco, M.D.Wakefield, RI1083097091
  6. Khaldoun Almhanna, MD, MPHProvidence, RI1790977650
  7. Ariel Birnbaum, M.D.Providence, RI1942212790
  8. Theodor Borgovan, M.D.Providence, RI1619397676
  9. Rimini Breakstone, MDNewport, RI1710103536
  10. James Butera, M.D.Providence, RI1790797538

Common questions

What is Maria Constantinou, MD's NPI number?

Maria Constantinou, MD's National Provider Identifier (NPI) is 1407999444, issued on Feb 15, 2007. An NPI identifies a provider in billing; it is not a license.

Where is Maria Constantinou, MD located?

The NPPES record lists a practice address at 593 Eddy St, Providence, RI, 02903. Phone: (401) 444-5396. Providers update this record themselves, so call before visiting.

How can I verify Maria Constantinou, MD's license?

NPPES lists Rhode Island license number MD10436, as entered by the provider. Search the Rhode Island Board of Medical Licensure and Discipline at https://healthri.mylicense.com/Verification/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.

How much does Maria Constantinou, MD prescribe under Medicare Part D?

In 2024, Maria Constantinou, MD had 359 Medicare Part D claims for 116 beneficiaries; the average among hematology & oncology physician prescribers was 885. Part D covers Medicare prescriptions only.

Source: CMS National Plan and Provider Enumeration System (NPPES), loaded Aug 27, 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.

Compiled from official public sources by the editorial process.

Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 27, 2026.