Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Carol I Williams, M.D.

Surgery Physician in Boston, MA · enumerated 2007.

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

National Provider Identifier

1043365786

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Registry record

Entity type Individual (Type 1)

Name Carol I Williams

Credential M.D.

Sex Female

Practice address Mcmcllc, 88 Black Falcon Pier, Boston, MA, 02210

Phone (800) 882-3036

Enumeration date Jan 24, 2007

Last updated in NPPES Jul 8, 2007

Taxonomy & licenses

208600000X Surgery Physician Allopathic & Osteopathic Physicians · License 46317 (MA) Primary

MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

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 Carol Williams?

The National Provider Identifier (NPI) for Carol Williams is 1043365786, a Type 1 (individual) record in the CMS NPPES registry.

Where does Carol Williams practice?

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

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-08.