Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Aaron Paul Rapoport, M.D.

Hematology (Internal Medicine) Physician in Baltimore, MD · enumerated 2006.

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

National Provider Identifier

1356309280

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Registry record

Entity type Individual (Type 1)

Name Dr. Aaron Paul Rapoport

Credential M.D.

Sex Male

Practice address 22 S Greene St, Baltimore, MD, 21201

Phone (410) 328-1230

Fax (410) 328-1975

Enumeration date May 2, 2006

Last updated in NPPES Mar 8, 2011

Taxonomy & licenses

207RH0000X Hematology (Internal Medicine) Physician Allopathic & Osteopathic Physicians · License D52477 (MD) 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
317600200	Medicaid	MD	-
026612800	Medicaid	DC	-
546974-01	Other	MD	BLUE CROSS/BLUE SHIELD
1000015029	Medicaid	DE	-

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.

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Frequently asked questions

How do I verify Aaron Rapoport's NPI record?

Cross-check NPI 1356309280 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1356309280 active?

Yes, as of the latest NPPES snapshot, NPI 1356309280 is active (record last updated 2011-03-08).

Other providers at this practice address

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Malinda Duke Pediatric Nurse Practitioner · Baltimore, MD NPI 1750383063 Maria Baer Hematology & Oncology Physician · Baltimore, MD NPI 1700881802 Saul Yanovich Hematology & Oncology Physician · Baltimore, MD NPI 1386643450 Michelle Duell Specialist · Baltimore, MD NPI 1982604773 Kirti Shetty Transplant Hepatology Physician · Baltimore, MD NPI 1669472429 Linda Jeng Clinical Molecular Genetics Physician · Baltimore, MD NPI 1437150604 Lisa Martinez Internal Medicine Physician · Baltimore, MD NPI 1003817131 Kirsten Lyke Infectious Disease Physician · Baltimore, MD NPI 1164416400

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2011-03-08.