Quick answers
- Where does Mark G. Holmes see patients?
- Medicare's clinician data lists 2 practice locations, including Marshalltown, IA and West Des Moines, IA. Call before your visit to confirm the address.
- What is Mark G. Holmes's specialty?
- Medicare lists Optometry as the primary specialty.
- Does Mark G. Holmes accept Medicare assignment?
- Yes. Medicare's clinician data says Mark G. Holmes 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 G. Holmes?
- (641) 754-6200, as listed in official Medicare / NPI Registry data.
- What is Mark G. Holmes's NPI number?
- 1306838115. 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 G. Holmes is enrolled with Medicare (CMS data updated 2026-10-02).
- 309 E Church StMarshalltown, IA 50158 (641) 754‑6200
- 6200 Westown Pkwy, Wolfe Eye ClinicWest Des Moines, IA 50266 (515) 223‑8685
Group practices
Medicare enrollment lists Mark G. Holmes as a member of this group (CMS data updated 2026-10-02).
- Wolfe Clinic Inc39 clinicians in the group
Specialties
- Optometryprimary
Other optometrists in Marshalltown
Clinicians with the same Medicare primary specialty in Marshalltown, IA — not a recommendation.
Clinician information
| Credential | OD |
|---|---|
| Medical school | Indiana University - School Of Optometry |
| Graduation year | 1996 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1306838115 |
| 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