Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Martin I Horowitz, M.D.

Pediatrics Physician in Burlington, MA · enumerated 2005.

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

National Provider Identifier

1023094612

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Registry record

Entity type Individual (Type 1)

Name Martin I Horowitz

Credential M.D.

Sex Male

Practice address 20 Wall St, Harvard Vanguard Medical Associates, Burlington, MA, 01803

Phone (781) 221-2500

Fax (781) 221-2510

Enumeration date Dec 16, 2005

Last updated in NPPES Jul 5, 2026

Taxonomy & licenses

208000000X Pediatrics Physician Allopathic & Osteopathic Physicians · License 58201 (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
B10467002	Other	MA	CIGNA
12-04574	Other	MA	UNITED HEALTHCARE
0140759	Medicaid	MA	-
058201	Other	MA	TUFTS HEALTH CARE
C21027	Other	MA	BLUE CROSS
3547318	Other	MA	AETNA
PP130	Other	MA	HARVARD PILGRIM
0015118	Other	MA	NEIGHBORHOOD HEALTH

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 is the NPI number for Martin Horowitz?

The National Provider Identifier (NPI) for Martin Horowitz is 1023094612, a Type 1 (individual) record in the CMS NPPES registry.

Where does Martin Horowitz practice?

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

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2026-07-05.