Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Robert Weitzman, MD

Ophthalmology Physician in Gaithersburg, MD · enumerated 2007.

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

National Provider Identifier

1164640934

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Registry record

Entity type Individual (Type 1)

Name Robert Weitzman

Credential MD

Sex Male

Practice address 754 Summerwalk Drive, Gaithersburg, MD, 20878

Phone (301) 330-0917

Enumeration date Apr 24, 2007

Last updated in NPPES Jul 8, 2007

Taxonomy & licenses

207W00000X Ophthalmology Physician Allopathic & Osteopathic Physicians · License D54360 (MD) Primary

MD — Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

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.

Read the full guide → Validate an NPI →

Frequently asked questions

How do I verify Robert Weitzman's NPI record?

Cross-check NPI 1164640934 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1164640934 active?

Yes — as of the latest NPPES snapshot, NPI 1164640934 is active (record last updated 2007-07-08).

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-08.