Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Harvey Ziessman, MD

Nuclear Radiology Physician in Baltimore, MD · enumerated 2005.

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

National Provider Identifier

1265431324

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Registry record

Entity type Individual (Type 1)

Name Harvey Ziessman

Credential MD

Sex Male

Practice address 601 N Caroline St, Baltimore, MD, 21287

Phone (410) 955-6500

Enumeration date Jul 20, 2005

Last updated in NPPES Sep 10, 2019

Taxonomy & licenses

2085N0904X Nuclear Radiology Physician Allopathic & Osteopathic Physicians · License 14602 (DC) Secondary

2085R0202X Diagnostic Radiology Physician Allopathic & Osteopathic Physicians · License D31378 (MD) Secondary

2085N0904X Nuclear Radiology Physician Allopathic & Osteopathic Physicians · License D31378 (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
859700601	Medicaid	MD	-

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

What is the NPI number for Harvey Ziessman?

The National Provider Identifier (NPI) for Harvey Ziessman is 1265431324, a Type 1 (individual) record in the CMS NPPES registry.

Where does Harvey Ziessman practice?

The practice location on file with NPPES is in Baltimore, MD. Providers can have multiple locations; NPPES lists the primary practice address.

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2019-09-10.