Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Jonathan Kessler, MD

Vascular & Interventional Radiology Physician in Duarte, CA · enumerated 2007.

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

National Provider Identifier

1679786818

Verified

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Registry record

Entity type Individual (Type 1)

Name Jonathan Kessler

Credential MD

Sex Male

Practice address 1500 Duarte Rd, Duarte, CA, 91010

Phone (626) 775-3200

Fax (626) 408-3911

Enumeration date May 7, 2007

Last updated in NPPES Nov 6, 2020

Taxonomy & licenses

2085R0204X Vascular & Interventional Radiology Physician Allopathic & Osteopathic Physicians · License A101595 (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
0A1016950	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.

Read the full guide → Validate an NPI →

Frequently asked questions

What specialty is Jonathan Kessler?

Jonathan Kessler is registered in NPPES with the primary taxonomy of Vascular & Interventional Radiology 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 2020-11-06.