Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Robert Horowitz, MD

Family Medicine Physician in Amherst, MA · enumerated 2006.

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

National Provider Identifier

1093783938

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Registry record

Entity type Individual (Type 1)

Name Robert Horowitz

Credential MD

Sex Male

Practice address 150 Infirmary Way, Amherst, MA, 01003

Phone (413) 577-5000

Fax (413) 577-5440

Enumeration date Mar 8, 2006

Last updated in NPPES Jul 8, 2007

Taxonomy & licenses

207Q00000X Family Medicine Physician Allopathic & Osteopathic Physicians · License 71517 (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
24838	Other	MA	HEALTH NEW ENGLAND
J09031	Other	MA	BCBSMA
071517	Other	MA	TUFTS
716735	Other	MA	CONNECTICARE
1129906	Other	MA	AETNA
711571	Other	MA	HARVARD PILGRIM

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 Robert Horowitz?

Robert Horowitz 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 2007-07-08.