Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Stephan John Kempiak, M.D,PH.D

Dermatology Physician in La Mesa, CA · enumerated 2007 · practices at Kaiser Foundation Health Plan Inc.

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

National Provider Identifier

1215136221

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Registry record

Entity type Individual (Type 1)

Name Dr. Stephan John Kempiak

Credential M.D,PH.D

Sex Male

Practice address 8080 Parkway Dr, La Mesa, CA, 91942

Phone (800) 290-5000

Enumeration date Jul 11, 2007

Last updated in NPPES Nov 30, 2021

Taxonomy & licenses

207N00000X Dermatology Physician Allopathic & Osteopathic Physicians · License A102166 (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
1215136221	Medicaid	CA	-

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.

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Frequently asked questions

Is this the official NPI registry?

No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.

What specialty is Stephan Kempiak?

Stephan Kempiak is registered in NPPES with the primary taxonomy of Dermatology Physician. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2021-11-30.