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

Thomas Charles Martin, M.D.

Addiction Medicine (Preventive Medicine) Physician in Waterville, ME · enumerated 2007.

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

National Provider Identifier

1356520647

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Registry record

Entity type Individual (Type 1)

Name Thomas Charles Martin

Credential M.D.

Sex Male

Practice address Waterville, ME, 04901

Phone (207) 742-8381

Enumeration date Nov 2, 2007

Last updated in NPPES Jan 2, 2023

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

Taxonomy & licenses

2080P0202X Pediatric Cardiology Physician Allopathic & Osteopathic Physicians · License 017607 (ME) Secondary

261QM2800X Methadone Clinic Ambulatory Health Care Facilities · License MD17607 (ME) Secondary

2083A0300X Addiction Medicine (Preventive Medicine) Physician Allopathic & Osteopathic Physicians · License MD17607 (ME) 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.

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Frequently asked questions

Is this the official NPI registry?

No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.

What specialty is Thomas Martin?

Thomas Martin is registered in NPPES with the primary taxonomy of Addiction Medicine (Preventive Medicine) Physician. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2023-01-02.