Quick answers
- Which hospitals does Michael S. Unnerstall work at?
- Medicare's official clinician data lists Michael S. Unnerstall at 2 hospitals: Mercy Hospital South and Mercy Hospital St Louis. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Michael S. Unnerstall see patients?
- Medicare's clinician data lists 3 practice locations, including Saint Louis, MO and Ballwin, MO. Call before your visit to confirm the address.
- What is Michael S. Unnerstall's specialty?
- Medicare lists Chiropractic as the primary specialty.
- Does Michael S. Unnerstall accept Medicare assignment?
- Yes. Medicare's clinician data says Michael S. Unnerstall 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 Michael S. Unnerstall?
- (314) 525-1906, as listed in official Medicare / NPI Registry data.
- What is Michael S. Unnerstall's NPI number?
- 1043210222. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Michael S. Unnerstall works
Medicare's Facility Affiliation Data lists Michael S. Unnerstall at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Mercy Hospital SouthSaint Louis, MO · Acute Care Hospital · CCN 260077
- Mercy Hospital St LouisSaint Louis, MO · Acute Care Hospital · CCN 260020
Practice locations
Addresses where Michael S. Unnerstall is enrolled with Medicare (CMS data updated 2026-10-02).
- 10010 Kennerly RdSaint Louis, MO 63128 (314) 525‑1906
- 10050 Kennerly Rd, Suite 2700Saint Louis, MO 63128 (314) 525‑4250
- 15945 Clayton Rd, Suite 230Ballwin, MO 63011 (636) 256‑5200
Group practices
Medicare enrollment lists Michael S. Unnerstall as a member of these groups (CMS data updated 2026-10-02).
- Mercy Hospitals East Communities98 clinicians in the group
- Mercy Hospital South49 clinicians in the group
Specialties
- Chiropracticprimary
Other chiropractors in Saint Louis
Clinicians with the same Medicare primary specialty in Saint Louis, MO — not a recommendation.
Clinician information
| Credential | DC |
|---|---|
| Medical school | Logan College Of Chiropractic |
| Graduation year | 1997 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1043210222 |
| 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