Quick answers
- Where does William J. Hartman see patients?
- Medicare's clinician data lists 2 practice locations, including Long Prairie, MN and Wadena, MN. Call before your visit to confirm the address.
- What is William J. Hartman's specialty?
- Medicare lists Optometry as the primary specialty.
- Does William J. Hartman accept Medicare assignment?
- Yes. Medicare's clinician data says William J. Hartman 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 William J. Hartman?
- (320) 732-2002, as listed in official Medicare / NPI Registry data.
- What is William J. Hartman's NPI number?
- 1639183734. 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 William J. Hartman is enrolled with Medicare (CMS data updated 2026-10-02).
- 249 Central AveLong Prairie, MN 56347 (320) 732‑2002
- 652 Jefferson St NWadena, MN 56482 (218) 631‑1456
Group practices
Medicare enrollment lists William J. Hartman as a member of this group (CMS data updated 2026-10-02).
- Minnesota Eyecare Network, Inc.5 clinicians in the group
Specialties
- Optometryprimary
Other optometrists in Minnesota
Clinicians with the same Medicare primary specialty in Minnesota — not a recommendation.
Clinician information
| Credential | OD |
|---|---|
| Medical school | Pacific University - College Of Optometry |
| Graduation year | 1991 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1639183734 |
| 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