Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Dr. Xiaojun Yan, MD

Pulmonary Disease Physician in Brooklyn, NY · enumerated 2005.

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

National Provider Identifier

1033110788

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Registry record

Entity type Individual (Type 1)

Name Dr. Xiaojun Yan

Credential MD

Sex Male

Practice address Brooklyn, NY, 11234

Phone (718) 252-3590

Fax (718) 252-6957

Enumeration date Aug 3, 2005

Last updated in NPPES Mar 24, 2011

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

207RP1001X Pulmonary Disease Physician Allopathic & Osteopathic Physicians · License 196486 (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
123593	Other	NY	VYTRA HEALTH PLAN
2186828	Other	NY	AETNA/US HEALTH
4770612	Other	NY	CIGNA
3C5321	Other	NY	HEALTH NET
P1004706	Other	NY	OXFORD
YR6486	Other	NY	ATLANTIS
32166P	Other	NY	H.I.P.
79844	Other	NY	GHI/HMO
01523142	Medicaid	NY	-
1446208	Other	NY	UNITED HEALTHCARE
2199426	Other	NY	FIRST HEALTH
089347	Other	NY	BETTER HEALTH ADVANTAGE
290011895	Other	NY	RAILROAD/MEDICARE

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

What specialty is Xiaojun Yan?

Xiaojun Yan is registered in NPPES with the primary taxonomy of Pulmonary Disease Physician. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

Is this the official NPI registry?

No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2011-03-24.