Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Robert J Vigderman, M.D.

Internal Medicine Physician in Amherst, MA · enumerated 2006.

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

National Provider Identifier

1831119478

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Registry record

Entity type Individual (Type 1)

Name Robert J Vigderman

Credential M.D.

Sex Male

Practice address 31 Hall Dr, Amherst Medical Center, Amherst, MA, 01002

Phone (413) 256-8561

Fax (413) 256-4421

Enumeration date Jul 19, 2006

Last updated in NPPES Jul 16, 2010

Taxonomy & licenses

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License 242581 (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
AA179715	Other	MA	HARVARD PILGRIM HEALTHCARE
110085491A	Medicaid	MA	-
4310651015	Other	MA	CIGNA HEALTHCARE
49147	Other	MA	HEALTH NEW ENGLAND

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

How do I verify Robert Vigderman's NPI record?

Cross-check NPI 1831119478 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1831119478 active?

Yes, as of the latest NPPES snapshot, NPI 1831119478 is active (record last updated 2010-07-16).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2010-07-16.