Quick answers
- Which hospitals does Derek C. Westman work at?
- Medicare's official clinician data lists Derek C. Westman at 1 hospital: Lakeland Hospital, St Joseph. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Derek C. Westman see patients?
- Medicare's clinician data lists 1 practice location in Saint Joseph, MI. Call before your visit to confirm the address.
- What is Derek C. Westman's specialty?
- Medicare lists Internal Medicine as the primary specialty.
- Does Derek C. Westman accept Medicare assignment?
- Yes. Medicare's clinician data says Derek C. Westman 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 Derek C. Westman?
- (269) 983-8300, as listed in official Medicare / NPI Registry data.
- What is Derek C. Westman's NPI number?
- 1982283065. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Derek C. Westman works
Medicare's Facility Affiliation Data lists Derek C. Westman at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Lakeland Hospital, St JosephSt Joseph, MI · Acute Care Hospital · CCN 230021
Practice locations
Addresses where Derek C. Westman is enrolled with Medicare (CMS data updated 2026-10-02).
- 1234 Napier AveSaint Joseph, MI 49085 (269) 983‑8300
Group practices
Medicare enrollment lists Derek C. Westman as a member of this group (CMS data updated 2026-10-02).
- Lakeland Medical Practices281 clinicians in the group
Specialties
- Internal Medicineprimary
Other internal medicine doctors in Saint Joseph
Clinicians with the same Medicare primary specialty in Saint Joseph, MI — not a recommendation.
Clinician information
| Credential | DO |
|---|---|
| Graduation year | 2021 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1982283065 |
| 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
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated 2026-10-02, retrieved 2026-10-29
- 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