Quick answers
- Does James C. Tesdahl accept Medicare assignment?
- Yes. Medicare's clinician data says James C. Tesdahl 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 C. Tesdahl see?
- In 2024, CMS data shows 774 Original Medicare patients and 1,787 services for James C. Tesdahl. This counts Original Medicare only and measures volume, not quality.
- What is James C. Tesdahl's NPI number?
- 1912999723. 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 C. Tesdahl, 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 | 774 |
|---|---|
| Services billed to Medicare | 1,787 |
| Different services or procedures | 20 |
| Participating Medicare provider | Yes |
| Average age of these patients | 76 |
Most frequent services
- Established patient problem focused exam of visual system (92012)955 services
- Imaging of retina (92134)261 services
- Imaging of optic nerve (92133)219 services
- Established patient complete exam of visual system (92014)142 services
- Exam of visual field with extended testing (92083)72 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 cholesterol71%
- High blood pressure70%
- Arthritis40%
- Diabetes26%
- Chronic kidney disease22%
- Ischemic heart disease21%
Practice locations
Addresses where James C. Tesdahl is enrolled with Medicare (CMS data updated October 2, 2026).
- 10 Taft St S, HumboldtHumboldt, IA 50548 (515) 332‑2950
Group practices
Medicare enrollment lists James C. Tesdahl as a member of this group (CMS data updated October 2, 2026).
- Wolfe Clinic Eye Centers LC8 clinicians in the group
Specialties
- Optometryprimary
Other optometrists in Iowa
Clinicians with the same Medicare primary specialty in Iowa — not a recommendation.
Other clinicians in Wolfe Clinic Eye Centers LC
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | OD |
|---|---|
| Optometry school | Indiana University - School Of Optometry |
| Graduation year | 1993 (33 years since optometry school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1912999723 |
| 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