Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Stephen J Peterson, M.D.

Internal Medicine Physician in Brooklyn, NY · enumerated 2006 · practices at Park Slope Medical Service PC.

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

National Provider Identifier

1245203892

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Registry record

Entity type Individual (Type 1)

Name Dr. Stephen J Peterson

Credential M.D.

Sex Male

Practice address 506 Sixth Street, Nymh Department of Medicine, Brooklyn, NY, 11215

Phone (718) 780-5246

Fax (718) 780-3259

Enumeration date Feb 13, 2006

Last updated in NPPES Jun 24, 2024

Taxonomy & licenses

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License 165002 (NY) 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
0492111	Other	NY	AETNA HMO
4622237	Other	NY	AETNA PPO
WP722	Other	NY	OXFORD
01009365	Medicaid	NY	-
1201593	Other	NY	UNITED HEALTHCARE
110123567	Other	NY	RAILROAD MEDICARE
68D251	Other	NY	BCBS OF NY WHITE PLAINS

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 Stephen Peterson's NPI record?

Cross-check NPI 1245203892 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1245203892 active?

Yes, as of the latest NPPES snapshot, NPI 1245203892 is active (record last updated 2024-06-24).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2024-06-24.