Quick answers
- Which hospitals does Mark Dittenbir work at?
- Medicare's official clinician data lists Mark Dittenbir at 3 hospitals: CHI St Alexius Health, Lakeland Hospital, St Joseph and Summit Healthcare Regional Medical Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Mark Dittenbir see patients?
- Medicare's clinician data lists 2 practice locations, including Niles, MI and Bismarck, ND. Call before your visit to confirm the address.
- What is Mark Dittenbir's specialty?
- Medicare lists General Surgery as the primary specialty.
- Does Mark Dittenbir accept Medicare assignment?
- Yes. Medicare's clinician data says Mark Dittenbir 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 Dittenbir?
- (269) 428-4411, as listed in official Medicare / NPI Registry data.
- What is Mark Dittenbir's NPI number?
- 1942249727. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Mark Dittenbir works
Medicare's Facility Affiliation Data lists Mark Dittenbir at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- CHI St Alexius HealthBismarck, ND · Acute Care Hospital · CCN 350002
- Lakeland Hospital, St JosephSt Joseph, MI · Acute Care Hospital · CCN 230021
- Summit Healthcare Regional Medical CenterShow Low, AZ · Acute Care Hospital · CCN 030062
Practice locations
Addresses where Mark Dittenbir is enrolled with Medicare (CMS data updated 2026-10-02).
- 42 N Saint Joseph Ave, Suite 304Niles, MI 49120 (269) 428‑4411
- 900 E Broadway AveBismarck, ND 58501 (701) 530‑7000
Group practices
Medicare enrollment lists Mark Dittenbir as a member of these groups (CMS data updated 2026-10-02).
- Lakeland Medical Practices281 clinicians in the group
- St Alexius Medical Center238 clinicians in the group
Specialties
- General Surgeryprimary
Other general surgeons in Niles
Clinicians with the same Medicare primary specialty in Niles, MI — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Michigan State University College Of Human Medicine |
| Graduation year | 1984 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1942249727 |
| 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