Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Jonathan Arn Hemphill, MD

Cardiovascular Disease Physician in Carmichael, CA · enumerated 2006.

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

National Provider Identifier

1952405326

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Registry record

Entity type Individual (Type 1)

Name Jonathan Arn Hemphill

Credential MD

Sex Male

Practice address 6555 Coyle Ave Ste 280, Carmichael, CA, 95608

Phone (916) 536-3560

Fax (916) 536-3567

Enumeration date Sep 7, 2006

Last updated in NPPES Mar 4, 2026

Taxonomy & licenses

207RC0000X Cardiovascular Disease Physician Allopathic & Osteopathic Physicians · License A44304 (CA) Primary

MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

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 specialty is Jonathan Hemphill?

Jonathan Hemphill is registered in NPPES with the primary taxonomy of Cardiovascular Disease Physician. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

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.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2026-03-04.