Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Peter A Mason, MD

Family Medicine Physician in Lebanon, NH · enumerated 2006 · practices at Alice Peck Day Memorial Hospital.

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

National Provider Identifier

1932174620

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Registry record

Entity type Individual (Type 1)

Name Dr. Peter A Mason

Credential MD

Sex Male

Practice address 5 Alice Peck Day Dr, Lebanon, NH, 03766

Phone (603) 448-3122

Fax (603) 448-7491

Enumeration date Feb 17, 2006

Last updated in NPPES Oct 19, 2023

Taxonomy & licenses

207QA0401X Addiction Medicine (Family Medicine) Physician Allopathic & Osteopathic Physicians · License 6471 (NH) Secondary

207Q00000X Family Medicine Physician Allopathic & Osteopathic Physicians · License 6471 (NH) 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
00018136	Other	NH	BLUE CROSS BLUE SHIELD VT
3073507	Medicaid	NH	-
C66677	Other	NH	HPHC
MASO085556	Other	NH	ANTHEM
80183541	Medicaid	NH	-
1000406	Medicaid	VT	-

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

What specialty is Peter Mason?

Peter Mason is registered in NPPES with the primary taxonomy of Family Medicine 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 2023-10-19.