Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Harold H Marcus, DDS

Dentist in Phila, PA · enumerated 2006 · practices at Harold H Marcus & Assoc.

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

National Provider Identifier

1255346565

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Registry record

Entity type Individual (Type 1)

Name Dr. Harold H Marcus

Credential DDS

Sex Male

Practice address 7215 W Passyunk Ave, Phila, PA, 19142

Phone (215) 727-1800

Fax (215) 365-1493

Enumeration date Jul 29, 2006

Last updated in NPPES Jul 8, 2007

Taxonomy & licenses

122300000X Dentist Dental Providers · License DS14297L (PA) Primary

DDS · Doctor of Dental Surgery: A licensed dentist; DDS and DMD are equivalent dental degrees. About the DDS credential

Other identifiers

Identifier	Type	State	Issuer
0052646102	Medicaid	PA	-

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

Is NPI 1255346565 active?

Yes, as of the latest NPPES snapshot, NPI 1255346565 is active (record last updated 2007-07-08).

How do I verify Harold Marcus's NPI record?

Cross-check NPI 1255346565 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

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Harold H Marcus & Assoc Dentist · Phila, PA NPI 1447399373

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