Quick answers
- Which hospitals does Mary E. Chellis work at?
- Medicare's official clinician data lists Mary E. Chellis at 1 hospital: Miami Valley Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Mary E. Chellis see patients?
- Medicare's clinician data lists 2 practice locations, including Middletown, OH and Dayton, OH. Call before your visit to confirm the address.
- What is Mary E. Chellis's specialty?
- Medicare lists Emergency Medicine as the primary specialty.
- Does Mary E. Chellis accept Medicare assignment?
- Yes. Medicare's clinician data says Mary E. Chellis 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 Mary E. Chellis?
- (513) 424-2111, as listed in official Medicare / NPI Registry data.
- What is Mary E. Chellis's NPI number?
- 1255422440. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Mary E. Chellis works
Medicare's Facility Affiliation Data lists Mary E. Chellis at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Miami Valley HospitalDayton, OH · Acute Care Hospital · CCN 360051
Practice locations
Addresses where Mary E. Chellis is enrolled with Medicare (CMS data updated 2026-10-02).
- 1 Medical Ctr DrMiddletown, OH 45005 (513) 424‑2111
- 1 Wyoming StDayton, OH 45409 (937) 208‑8000
Group practices
Medicare enrollment lists Mary E. Chellis as a member of this group (CMS data updated 2026-10-02).
- PHS Emergency Billing LLC75 clinicians in the group
Specialties
- Emergency Medicineprimary
Other emergency medicine doctors in Middletown
Clinicians with the same Medicare primary specialty in Middletown, OH — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Wright State University Boonshoft School Of Medicine |
| Graduation year | 1992 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1255422440 |
| 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