NPPES file of Aug 9, 2026

Adam Jan Olszewski, M.D.

Hematology & Oncology Physician · Providence, RI

Adam Jan Olszewski, M.D. is a hematology & oncology physician with a practice address in Providence, Rhode Island, and NPI 1467436915, issued on Nov 29, 2005. Check the license (Rhode Island MD11974, 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, file of Aug 9, 2026 · Medicare files 2024 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1467436915
Name
Adam Jan Olszewski
Credential
M.D.
Primary taxonomy
Hematology & Oncology Physician 207RH0003X
License number
MD11974 RI
Self-reported in NPPES; status is on the state search
Practice location
593 Eddy St, Providence, RI 02903
Phone
(401) 444-5435
Enumerated
Nov 29, 2005
Record last updated
Jul 21, 2022
Fax
(401) 444-8918
Medicaid IDs
7058716 RI
110087849A MA
Medicare enrollment
Enrolled (PECOS I20060921000063); accepts Medicare assignment
Telehealth
Offers telehealth (CMS)
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). Enrollment, assignment, school and telehealth: CMS Doctors and Clinicians file, Aug 2026. A record is not a license: verify it with the state board.
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8 nearest hematology & oncology physician records → All 88 in Rhode Island → Look up another NPI →

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 Adam Jan Olszewski 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 MD11974    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

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32% fewer Medicare Part D claims than the average hematology & oncology physician in 2024

596 Medicare Part D claims for 98 beneficiaries, against an average of 877 among the 10,784 providers of this specialty who prescribed in Part D. 35 claims were for opioids.

  1. Adam Olszewski596
  2. Specialty average877

Most prescribed

  1. Brukinsa47 claims
  2. Allopurinol44 claims
  3. Calquence40 claims
  4. Prednisone34 claims
  5. Eliquis33 claims
  6. Pantoprazole Sodium23 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: $17,030.37

17 payments; by number, the most common kind was food and beverage; the largest payer was Adc Therapeutics America, 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.

  1. Adam Olszewski$17,030
  2. Specialty average$7,481

Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.

One hospital affiliation

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

Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through); hospitals matched to CMS Hospital General Information (Care Compare) (data.cms.gov). Star ratings are CMS hospital ratings, not ratings of this provider.

Adam Jan Olszewski among 88 hematology & oncology physician records in Rhode Island

Adam Jan Olszewski, M.D. is one of 88 hematology & oncology physician records with a practice address in Rhode Island. 85% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2005, is newer than 0% of them.

  • NPI issued2005 · 0% of these records are older, 85% newer
  • In a Medicare fileYes · 85% of these records are
  • In the CMS Doctors and Clinicians fileYes · 73% of these records are
  • Graduated1999 · median 2002 among the 64 with a school on file
  • Record last updated2022 · 52% 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 Rhode Island practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Hematology & Oncology Physician providers in Rhode Island

There are 88 hematology & oncology physician records in Rhode Island.

All 88 in Rhode Island → Every provider in Providence → Hematology & Oncology Physician nationwide →

The 8 hematology & oncology physician records with the nearest ZIP codes

  1. Ariel Birnbaum, M.D.Providence, RI 029031942212790
  2. James Butera, M.D.Providence, RI 029031790797538
  3. Maria Constantinou, MDProvidence, RI 029031407999444
  4. Wafik El Deiry, MDProvidence, RI 029031275575714
  5. Katherine Faricy-Anderson, MD MPHProvidence, RI 029031194940700
  6. Mary Anne Fenton, M.D.Providence, RI 029031881606622
  7. Humera Khurshid, MDProvidence, RI 029031013991926
  8. Matthew Quesenberry, M.D.Providence, RI 029031194941419

Common questions

What is Adam Jan Olszewski, M.D.'s NPI number?

Adam Jan Olszewski, M.D.'s National Provider Identifier (NPI) is 1467436915, issued on Nov 29, 2005. An NPI identifies a provider in billing; it is not a license.

Where is Adam Jan Olszewski, M.D. located?

The NPPES record lists a practice address at 593 Eddy St, Providence, RI, 02903. Phone: (401) 444-5435. Providers update this record themselves, so call before visiting.

How can I verify Adam Jan Olszewski, M.D.'s license?

NPPES lists Rhode Island license number MD11974, 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 Adam Jan Olszewski, M.D. prescribe under Medicare Part D?

In 2024, Adam Jan Olszewski, M.D. had 596 Medicare Part D claims for 98 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.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

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.