Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Adam Jan Olszewski, M.D.

Hematology & Oncology Physician in Providence, RI · enumerated 2005.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1467436915

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Registry record

Entity type Individual (Type 1)

Name Dr. Adam Jan Olszewski

Credential M.D.

Sex Male

Practice address 593 Eddy St, Providence, RI, 02903

Phone (401) 444-5435

Fax (401) 444-8918

Enumeration date Nov 29, 2005

Last updated in NPPES Jul 21, 2022

Taxonomy & licenses

207RH0003X Hematology & Oncology Physician Allopathic & Osteopathic Physicians · License MD11974 (RI) Primary

MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

Other identifiers

Identifier	Type	State	Issuer
7058716	Medicaid	RI	-
110087849A	Medicaid	MA	-
0070587161	Other	RI	MEDICARE PTAN

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.

Read the full guide → Validate an NPI →

Frequently asked questions

Where does Adam Olszewski practice?

The practice location on file with NPPES is in Providence, RI. Providers can have multiple locations; NPPES lists the primary practice address.

What is the NPI number for Adam Olszewski?

The National Provider Identifier (NPI) for Adam Olszewski is 1467436915, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2022-07-21.