Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Douglas M Whittemore, MD.

Urology Physician in Storrs Mansfield, CT · enumerated 2006.

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

National Provider Identifier

1255383675

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Registry record

Entity type Individual (Type 1)

Name Dr. Douglas M Whittemore

Credential MD.

Sex Male

Practice address 345 Hanks Hill Rd, Storrs Mansfield, CT, 06268

Phone (860) 420-9299

Enumeration date May 16, 2006

Last updated in NPPES Jan 24, 2011

Taxonomy & licenses

174400000X Specialist Other Service Providers · License 023672 (CT) Secondary

174400000X Specialist Other Service Providers · License 238240 (MA) Secondary

208800000X Urology Physician Allopathic & Osteopathic Physicians · License 238240 (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
9771476	Medicaid	MA	-
M20928	Other	MA	GROUP MEDICARE

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

Where does Douglas Whittemore practice?

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

What is the NPI number for Douglas Whittemore?

The National Provider Identifier (NPI) for Douglas Whittemore is 1255383675, a Type 1 (individual) record in the CMS NPPES registry.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2011-01-24.