Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Matthew Christopher Mason, DO

Pediatrics Physician in Waterville, ME · enumerated 2018.

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

National Provider Identifier

1659878254

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Registry record

Entity type Individual (Type 1)

Name Dr. Matthew Christopher Mason

Credential DO

Sex Male

Practice address 295c Kennedy Memorial Dr Ste 1, Waterville, ME, 04901

Phone (207) 873-5437

Fax (207) 861-5448

Enumeration date Apr 10, 2018

Last updated in NPPES Jul 22, 2021

Taxonomy & licenses

208000000X Pediatrics Physician Allopathic & Osteopathic Physicians · License DO3254 (ME) Primary

DO · Doctor of Osteopathic Medicine: A fully licensed physician trained in osteopathic medical schools, with the same practice rights as an MD. About the DO 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 specialty is Matthew Mason?

Matthew Mason is registered in NPPES with the primary taxonomy of Pediatrics Physician. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

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.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2021-07-22.