Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Karen Williams, MD

Pediatrics Physician in Oak Bluffs, MA · enumerated 2006.

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

National Provider Identifier

1558384438

Verified

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Registry record

Entity type Individual (Type 1)

Name Karen Williams

Credential MD

Sex Female

Practice address Martha'S Vineyard Hospital, 1 Hospital Road, Oak Bluffs, MA, 02557

Phone (508) 693-3732

Fax (508) 790-6860

Enumeration date Jul 25, 2006

Last updated in NPPES Jul 13, 2018

Taxonomy & licenses

208000000X Pediatrics Physician Allopathic & Osteopathic Physicians · License 270940 (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
5341302	Medicaid	NJ	-

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 is the NPI number for Karen Williams?

The National Provider Identifier (NPI) for Karen Williams is 1558384438, a Type 1 (individual) record in the CMS NPPES registry.

Where does Karen Williams practice?

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

Other providers at this practice address

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Sandra Talanian Family Medicine Physician · Oak Bluffs, MA NPI 1871233122

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2018-07-13.