Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Gary H Cassel, MD

Ophthalmology Physician in Owings Mills, MD · enumerated 2006.

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

National Provider Identifier

1124180880

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)

Name Dr. Gary H Cassel

Credential MD

Sex Male

Practice address 23 Crossroads Dr Ste 310, Owings Mills, MD, 21117

Phone (410) 581-1500

Fax (410) 581-0577

Enumeration date Dec 15, 2006

Last updated in NPPES Feb 5, 2025

Taxonomy & licenses

207W00000X Ophthalmology Physician Allopathic & Osteopathic Physicians · License D24345 (MD) 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
327591400	Medicaid	MD	-
KV69RY	Other	MD	BCBS
CA9262	Other	MD	RAILROAD MEDICARE

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 Gary Cassel's NPI record?

Cross-check NPI 1124180880 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1124180880 active?

Yes, as of the latest NPPES snapshot, NPI 1124180880 is active (record last updated 2025-02-05).

Other providers at this practice address

Browse all →

Gary H. Cassel, M.D.,P.A. Ophthalmology Physician · Owings Mills, MD NPI 1265597082 The Retina Group of Washington, Pllc Ophthalmology Physician · Owings Mills, MD NPI 1457111494

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-02-05.