Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Thomas Mammen, MD

Surgery Physician in Wilmington, DE · enumerated 2006.

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

National Provider Identifier

1376518324

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)

Name Thomas Mammen

Credential MD

Sex Male

Practice address 501 W14th St, Wilmington, DE, 19899

Phone (302) 428-4175

Fax (302) 428-4951

Enumeration date Feb 22, 2006

Last updated in NPPES Jun 24, 2008

Taxonomy & licenses

208600000X Surgery Physician Allopathic & Osteopathic Physicians · License C10001807 (DE) 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 Thomas Mammen?

The National Provider Identifier (NPI) for Thomas Mammen is 1376518324, a Type 1 (individual) record in the CMS NPPES registry.

Where does Thomas Mammen practice?

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

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2008-06-24.