Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Lisa A Thayer, M.D.

Pediatrics Physician in Watertown, MA · enumerated 2006.

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

National Provider Identifier

1073593299

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Registry record

Entity type Individual (Type 1)

Name Lisa A Thayer

Credential M.D.

Sex Female

Practice address 485 Arsenal St, Watertown, MA, 02472

Phone (617) 972-5570

Fax (617) 972-5593

Enumeration date Jan 23, 2006

Last updated in NPPES Mar 8, 2021

Taxonomy & licenses

208000000X Pediatrics Physician Allopathic & Osteopathic Physicians · License 155172 (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
0015185	Other	MA	NEIGHBORHOOD HEALTH
3189732	Medicaid	MA	-
J19137	Other	MA	BLUE CROSS
PP820	Other	MA	HARVARD PILGRIM
155172	Other	MA	TUFTS

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 Lisa Thayer?

Lisa Thayer 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.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2021-03-08.