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

William J Wittman, M.D.

Internal Medicine Physician in Falmouth, MA · enumerated 2005.

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

National Provider Identifier

1891798724

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Registry record

Entity type Individual (Type 1)

Name William J Wittman

Credential M.D.

Sex Male

Practice address Falmouth, MA, 02540

Phone (508) 540-1046

Enumeration date May 24, 2005

Last updated in NPPES May 28, 2010

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

Taxonomy & licenses

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License 54719 (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
P00067055	Other	MA	RAIL ROAD MEDICARE
6251	Other	MA	HARVARD PILGRIM
376898	Other	MA	PRIVATE HEALTHCARE SYSTEM
715096	Other	MA	TUFTS HEALTH PLAN
M18254	Other	MA	BLUE CROSS BLUE SHIELD
0402434	Other	MA	UNITED HEALTHCARE
3256423	Other	MA	AETNA
6195016	Medicaid	MA	-

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 William Wittman's NPI record?

Cross-check NPI 1891798724 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1891798724 active?

Yes, as of the latest NPPES snapshot, NPI 1891798724 is active (record last updated 2010-05-28).

Other providers at this practice address

Browse all →

Devin Mcmanus Internal Medicine Physician · Falmouth, MA NPI 1548263486 William J. Wittman, MD, PC Internal Medicine Physician · Falmouth, MA NPI 1366581381 Mcmanus Medical, PC Internal Medicine Physician · Falmouth, MA NPI 1437298460 Robert Stenson Nurse Practitioner · Falmouth, MA NPI 1932358546

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2010-05-28.