Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mark F Clapper, MD

Q: What is the NPI number for Mark Clapper?

The National Provider Identifier (NPI) for Mark Clapper is 1548460603, a Type 1 (individual) record in the CMS NPPES registry.

Neuromusculoskeletal Medicine & OMM Physician in San Diego, CA · enumerated 2007 · practices at Kaiser.

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

National Provider Identifier

1548460603

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Registry record

Entity type Individual (Type 1)

Name Mark F Clapper

Credential MD

Sex Male

Practice address 4405 Vandever Ave, San Diego, CA, 92120

Phone (619) 528-5000

Fax (626) 405-6768

Enumeration date Jul 18, 2007

Last updated in NPPES Nov 29, 2021

Taxonomy & licenses

204D00000X Neuromusculoskeletal Medicine & OMM Physician Allopathic & Osteopathic Physicians · License G59619 (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
00G596190	Other	CA	MEDICAL PIN

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

Where does Mark Clapper practice?

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

What is the NPI number for Mark Clapper?

The National Provider Identifier (NPI) for Mark Clapper is 1548460603, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2021-11-29.