Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

John T Mattson, MD

Orthopaedic Surgery Physician in Berkeley, CA · enumerated 2006.

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

National Provider Identifier

1073545950

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)

Name John T Mattson

Credential MD

Sex Male

Practice address 3010 Colby St, 118, Berkeley, CA, 94705

Phone (800) 943-8099

Fax (510) 845-0522

Enumeration date Jul 7, 2006

Last updated in NPPES May 2, 2011

Taxonomy & licenses

207X00000X Orthopaedic Surgery Physician Allopathic & Osteopathic Physicians · License G33079 (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
G33079	Other	CA	BLUE CROSS
00G330790	Medicaid	CA	—
250007310	Other	CA	RAILROAD MEDICARE PIN
G33079	Other	CA	STATE LICENSE
00G330790	Other	CA	BLUE SHIELD

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 John Mattson?

John Mattson is registered in NPPES with the primary taxonomy of Orthopaedic 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 →

Brian Hinrichsen Emergency Medicine Physician · Berkeley, CA NPI 1376534792 James Nickelsen Allergy & Immunology Physician · Berkeley, CA NPI 1891772000 Mark Reiley Orthopaedic Foot and Ankle Surgery Physician · Berkeley, CA NPI 1578595468 Amirali Rahmatian General Practice Dentistry · Berkeley, CA NPI 1851305254 Nicola Hanchock Internal Medicine Physician · Berkeley, CA NPI 1518074830 Andrew Sorenson Ophthalmology Physician · Berkeley, CA NPI 1326139981 Robert Sorenson Ophthalmology Physician · Berkeley, CA NPI 1235220799 Robert Fowler Surgery Physician · Berkeley, CA NPI 1891879417

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2011-05-02.