Quick answers
- Where does Christopher Posthumus see patients?
- Medicare's clinician data lists 2 practice locations, including Grand Rapids, MI and Caledonia, MI. Call before your visit to confirm the address.
- What is Christopher Posthumus's specialty?
- Medicare lists Physical Therapist in Private Practice as the primary specialty.
- Does Christopher Posthumus accept Medicare assignment?
- Yes. Medicare's clinician data says Christopher Posthumus 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 Christopher Posthumus?
- (616) 888-7993, as listed in official Medicare / NPI Registry data.
- What is Christopher Posthumus's NPI number?
- 1386923431. 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 Christopher Posthumus is enrolled with Medicare (CMS data updated 2026-10-02).
- 1264 Plainfield Ave NEGrand Rapids, MI 49505 (616) 888‑7993
- 9321 Cherry Valley Ave SE, Suite DCaledonia, MI 49316 (616) 536‑9339
Group practices
Medicare enrollment lists Christopher Posthumus as a member of this group (CMS data updated 2026-10-02).
- Ivyrehab Michigan LLC156 clinicians in the group
Specialties
Find other clinicians: Physical Therapist in Private Practice, Michigan →
Other physical therapists in Grand Rapids
Clinicians with the same Medicare primary specialty in Grand Rapids, MI — not a recommendation.
Clinician information
| Credential | PT |
|---|---|
| Graduation year | 2011 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1386923431 |
| 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