Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. William Dylewsky, M.D.

Anesthesiology Physician in Framingham, MA · enumerated 2005.

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

National Provider Identifier

1891776126

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Registry record

Entity type Individual (Type 1)

Name Dr. William Dylewsky

Credential M.D.

Sex Male

Practice address 115 Lincoln St, Framingham, MA, 01702

Phone (508) 875-1600

Fax (508) 875-1297

Enumeration date Nov 14, 2005

Last updated in NPPES Nov 1, 2007

Taxonomy & licenses

207L00000X Anesthesiology Physician Allopathic & Osteopathic Physicians · License 71695 (MA) 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
82971	Other	MA	AETNA US HEALTHCARE
5586023	Other	MA	AETNA
J12456DY	Other	MA	BLUE CROSS/SHIELD MA
050070440	Other	MA	MEDICARE RAILROAD
2000005	Other	MA	UNITED HEALTHCARE
30809029	Medicaid	MA	-
613824	Other	MA	HARVARD PILGRIM HEALTHCAR
732408	Other	MA	TUFTS HEALTH PLAN

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

What is the NPI number for William Dylewsky?

The National Provider Identifier (NPI) for William Dylewsky is 1891776126, a Type 1 (individual) record in the CMS NPPES registry.

Where does William Dylewsky practice?

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

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-11-01.