Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. James B Mattax Jr., M.D.

Ophthalmology Physician in Springfield, MO · enumerated 2005.

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

National Provider Identifier

1346244779

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Registry record

Entity type Individual (Type 1)

Name Dr. James B Mattax Jr.

Credential M.D.

Sex Male

Practice address 1265 E Primrose St, Springfield, MO, 65804

Phone (417) 886-3937

Fax (417) 886-1285

Enumeration date Jun 13, 2005

Last updated in NPPES Jul 1, 2020

Taxonomy & licenses

207W00000X Ophthalmology Physician Allopathic & Osteopathic Physicians · License R9H41 (MO) 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
202545034	Medicaid	MO	-
202545026	Medicaid	MO	-
0840001	Other	MO	UNITED HC OF MIDWEST
32245	Other	MO	OPTICARE
118132	Other	MO	BLUE CROSS/SHIELD ST.LOU
822629	Other	MO	HEALTHCARE PREFERRED
1402	Other	MO	COX HEALTH INS

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 James Mattax?

James Mattax is registered in NPPES with the primary taxonomy of Ophthalmology 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 2020-07-01.