Quick answers
- Where does Mark E. Bontreger see patients?
- Medicare's clinician data lists 1 practice location in Watertown, SD. Call before your visit to confirm the address.
- What is Mark E. Bontreger's specialty?
- Medicare lists Clinical Psychologist as the primary specialty.
- Does Mark E. Bontreger accept Medicare assignment?
- Yes. Medicare's clinician data says Mark E. Bontreger 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 E. Bontreger?
- (605) 882-0800, as listed in official Medicare / NPI Registry data.
- What is Mark E. Bontreger's NPI number?
- 1861505190. 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 E. Bontreger is enrolled with Medicare (CMS data updated 2026-10-02).
- 525 5th St SE, Suite L 13Watertown, SD 57201 (605) 882‑0800
Specialties
- Clinical Psychologistprimary
Find other clinicians: Clinical Psychologist, South Dakota →
Other clinical psychologists in South Dakota
Clinicians with the same Medicare primary specialty in South Dakota — not a recommendation.
Clinician information
| Credential | CP |
|---|---|
| Graduation year | 1995 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1861505190 |
| 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