Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Jon Baker, MD

Surgery Physician in Mather, CA · enumerated 2006.

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

National Provider Identifier

1548237746

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)

Name Dr. Jon Baker

Credential MD

Sex Male

Practice address 10535 Hospital Way, Mather, CA, 95655

Phone (916) 843-7091

Fax (916) 361-2955

Enumeration date Mar 7, 2006

Last updated in NPPES Sep 11, 2025

Taxonomy & licenses

208600000X Surgery Physician Allopathic & Osteopathic Physicians · License G077954 (CA) Primary

208G00000X Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician Allopathic & Osteopathic Physicians · License G077954 (CA) Secondary

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 Jon Baker?

Jon Baker is registered in NPPES with the primary taxonomy of Surgery 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.

Other providers at this practice address

Browse all →

Harold Burger Infectious Disease Physician · Mather, CA NPI 1447251681 Aliya Akbar Family Medicine Physician · Mather, CA NPI 1467454934 Barbara Weiser Infectious Disease Physician · Mather, CA NPI 1164419784 Patricia Dalton Specialist · Mather, CA NPI 1003898750 Raymond Byun Infectious Disease Physician · Mather, CA NPI 1578545950 Randall Goethals Geriatric Medicine (Internal Medicine) Physician · Mather, CA NPI 1316920713 Edwin Horgan Otolaryngology Physician · Mather, CA NPI 1881677177 Martin Hoffman Physical Medicine & Rehabilitation Physician · Mather, CA NPI 1245213503

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-09-11.