Quick answers
- Does James B. Mattax Jr. accept Medicare assignment?
- Yes. Medicare's clinician data says James B. Mattax Jr. accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
- How many Medicare patients does James B. Mattax Jr. see?
- In 2024, CMS data shows 815 Original Medicare patients and 1,615 services for James B. Mattax Jr.. This counts Original Medicare only and measures volume, not quality.
- What is James B. Mattax Jr.'s NPI number?
- 1346244779. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Medicare activity in 2024
Official CMS public-use data for James B. Mattax Jr., data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.
| Original Medicare patients | 815 |
|---|---|
| Services billed to Medicare | 1,615 |
| Different services or procedures | 27 |
| Participating Medicare provider | Yes |
| Average age of these patients | 76 |
Most frequent services
- Established patient complete exam of visual system (92014)629 services
- Measurement of corneal curvature and depth of eye (92136)225 services
- Removal of cataract with insertion of prosthetic lens (66984)207 services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)154 services
- Imaging of retina (92134)96 services
Chronic conditions among these patients
Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).
- High cholesterol72%
- High blood pressure70%
- Arthritis47%
- Chronic kidney disease25%
- Diabetes22%
- Ischemic heart disease21%
Practice locations
Addresses where James B. Mattax Jr. is enrolled with Medicare (CMS data updated October 2, 2026).
- 1265 E Primrose StSpringfield, MO 65804
- 430 N Jefferson AveLebanon, MO 65536 (417) 886‑3937
Group practices
Medicare enrollment lists James B. Mattax Jr. as a member of this group (CMS data updated October 2, 2026).
- Mattax Neu Prater Eye Center Inc13 clinicians in the group
Specialties
- Ophthalmologyprimary
Other ophthalmologists in Springfield
Clinicians with the same Medicare primary specialty in Springfield, MO — not a recommendation.
Other clinicians in Mattax Neu Prater Eye Center Inc
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Texas Southwestern Medical School At Dallas |
| Graduation year | 1983 (43 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1346244779 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
- Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians