Quick answers
- Where does James M. Diekema see patients?
- Medicare's clinician data lists 10 practice locations, including Alpena, MI, Monroe, MI and Lansing, MI. Call before your visit to confirm the address.
- What is James M. Diekema's specialty?
- Medicare lists Physician Assistant as the primary specialty.
- Does James M. Diekema accept Medicare assignment?
- Yes. Medicare's clinician data says James M. Diekema accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of 2026-10-02. Ask the office to confirm before your visit.
- What is the phone number for James M. Diekema?
- (989) 250-1925, as listed in official Medicare / NPI Registry data.
- What is James M. Diekema's NPI number?
- 1619080702. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Practice locations
Addresses where James M. Diekema is enrolled with Medicare (CMS data updated 2026-10-02). The first 5 of 10; the Medicare profile lists all.
- 1131 M 32Alpena, MI 49707 (989) 250‑1925
- 1261 N Telegraph RdMonroe, MI 48162 (734) 265‑9123
- 1540 Lake Lansing Rd, Suite 203Lansing, MI 48912 (517) 913‑6711
- 1740 28th St SEGrand Rapids, MI 49508 (616) 323‑3999
- 1803 M, Suite 139Benton Harbor, MI 49022 (269) 487‑3021
Group practices
Medicare enrollment lists James M. Diekema as a member of these groups (CMS data updated 2026-10-02).
- Pic Indiana PC140 clinicians in the group
- Complexcare Medical Group Midwest M PLLC95 clinicians in the group
- Patient One Care, PLLC12 clinicians in the group
- Legacy Physician Group PC11 clinicians in the group
Specialties
- Physician Assistantprimary
Other physician assistants in Alpena
Clinicians with the same Medicare primary specialty in Alpena, MI — not a recommendation.
Clinician information
| Credential | PA |
|---|---|
| Graduation year | 1997 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1619080702 |
| 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 2026-10-02, retrieved 2026-10-29
- 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