Quick answers
- Where does Mark B. Mahacek see patients?
- Medicare's clinician data lists 3 practice locations, including Muskegon, MI and Spring Lake, MI. Call before your visit to confirm the address.
- What is Mark B. Mahacek's specialty?
- Medicare lists Clinical Psychologist as the primary specialty.
- Does Mark B. Mahacek accept Medicare assignment?
- Yes. Medicare's clinician data says Mark B. Mahacek 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 B. Mahacek?
- (231) 672-2000, as listed in official Medicare / NPI Registry data.
- What is Mark B. Mahacek's NPI number?
- 1346330438. 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 B. Mahacek is enrolled with Medicare (CMS data updated 2026-10-02).
- 1500 Serman Boulevard, Mercy Health PartnersMuskegon, MI 49444 (231) 672‑2000
- 1740 Village DrMuskegon, MI 49442 (231) 672‑2700
- 19100 N Fruitport RdSpring Lake, MI 49456 (616) 842‑3222
Specialties
- Clinical Psychologistprimary
Other clinical psychologists in Muskegon
Clinicians with the same Medicare primary specialty in Muskegon, MI — not a recommendation.
Clinician information
| Credential | PSY |
|---|---|
| Graduation year | 1991 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1346330438 |
| 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