Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Matthew J Cywinski, MD

Colon & Rectal Surgery Physician in Williamsville, NY · enumerated 2006.

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

National Provider Identifier

1639136682

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Registry record

Entity type Individual (Type 1)

Name Dr. Matthew J Cywinski

Credential MD

Sex Male

Practice address 295 Essjay Rd, Williamsville, NY, 14221

Phone (716) 834-4237

Fax (716) 834-3639

Enumeration date Apr 26, 2006

Last updated in NPPES Dec 6, 2021

Taxonomy & licenses

208C00000X Colon & Rectal Surgery Physician Allopathic & Osteopathic Physicians · License 206063-1 (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
161000580	Other	NY	NORTH AMERICAN PREFERED
161000580	Other	NY	EMPIRE
0021748	Other	NY	GHI
000524692002	Other	NY	HEALTH NOW
01843425	Medicaid	NY	-
1409274	Other	NY	IHA
206063-0B	Other	NY	WORKERS COMPENSATION
280000943	Other	NY	RR MEDICARE
161000580	Other	NY	AETNA

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 Matthew Cywinski's NPI record?

Cross-check NPI 1639136682 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1639136682 active?

Yes, as of the latest NPPES snapshot, NPI 1639136682 is active (record last updated 2021-12-06).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2021-12-06.