Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mr. Robert B Eisenberg, M.D.

Urology Physician in Modesto, CA · enumerated 2006.

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

National Provider Identifier

1821014820

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Registry record

Entity type Individual (Type 1)

Name Mr. Robert B Eisenberg

Credential M.D.

Sex Male

Practice address 1541 Florida Ave, #100, Modesto, CA, 95350

Phone (209) 577-3388

Fax (209) 338-0024

Enumeration date Jul 14, 2006

Last updated in NPPES Mar 13, 2015

Taxonomy & licenses

208800000X Urology Physician Allopathic & Osteopathic Physicians · License A31900 (CA) 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
CK115X	Other	CA	MEDICARE PTAN FOR GHP
1982938247	Medicaid	CA	—
WA43540C	Other	CA	MEDICARE PTAN FOR GHP

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 Eisenberg's NPI record?

Cross-check NPI 1821014820 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1821014820 active?

Yes — as of the latest NPPES snapshot, NPI 1821014820 is active (record last updated 2015-03-13).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2015-03-13.