Quick answers
- Does Ragean M. Muessig accept Medicare assignment?
- Yes. Medicare's clinician data says Ragean M. Muessig accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
- What is Ragean M. Muessig's NPI number?
- 1295233633. 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 Ragean M. Muessig is enrolled with Medicare (CMS data updated October 2, 2026).
- 15740 S Outer 40 RdChesterfield, MO 63017 (636) 237‑4200
- 615 S New Ballas RdSaint Louis, MO 63141 (636) 251‑6000
Group practices
Medicare enrollment lists Ragean M. Muessig as a member of these groups (CMS data updated October 2, 2026).
- Mercy Aco Clinical Services Inc170 clinicians in the group
- Mercy Hospitals East Communities98 clinicians in the group
Specialties
- Nurse Practitionerprimary
Other nurse practitioners in Chesterfield
Clinicians with the same Medicare primary specialty in Chesterfield, MO — not a recommendation.
Other clinicians in Mercy Aco Clinical Services Inc
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | NP |
|---|---|
| Graduation year | 2017 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1295233633 |
| 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 October 2, 2026, retrieved October 29, 2026
- 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