Quick answers
- Where does Mark Korthals see patients?
- Medicare's clinician data lists 2 practice locations, including Hutchinson, MN and Elk River, MN. Call before your visit to confirm the address.
- What is Mark Korthals's specialty?
- Medicare lists Optometry as the primary specialty.
- Does Mark Korthals accept Medicare assignment?
- Yes. Medicare's clinician data says Mark Korthals 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 Mark Korthals?
- (320) 587-4744, as listed in official Medicare / NPI Registry data.
- What is Mark Korthals's NPI number?
- 1215091749. 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 Mark Korthals is enrolled with Medicare (CMS data updated 2026-10-02).
- 1059 Hwy 15 SHutchinson, MN 55350 (320) 587‑4744
- 19576 Holt St NWElk River, MN 55330 (763) 241‑2083
Group practices
Medicare enrollment lists Mark Korthals as a member of these groups (CMS data updated 2026-10-02).
- Minnesota Optical LLC5 clinicians in the group
- Hutchinson Superstore Inc4 clinicians in the group
Specialties
- Optometryprimary
Other optometrists in Hutchinson
Clinicians with the same Medicare primary specialty in Hutchinson, MN — not a recommendation.
Clinician information
| Credential | OD |
|---|---|
| Medical school | Illinois College Of Optometry At Chicago |
| Graduation year | 2004 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1215091749 |
| 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