Quick answers
- Which hospitals does Mark L. Billy work at?
- Medicare's official clinician data lists Mark L. Billy at 1 hospital: MH St Elizabeth Youngstown Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Mark L. Billy see patients?
- Medicare's clinician data lists 2 practice locations, including Austintown, OH and Boardman, OH. Call before your visit to confirm the address.
- What is Mark L. Billy's specialty?
- Medicare lists Maxillofacial Surgery as the primary specialty.
- Does Mark L. Billy accept Medicare assignment?
- Yes. Medicare's clinician data says Mark L. Billy 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 L. Billy?
- (330) 792-2501, as listed in official Medicare / NPI Registry data.
- What is Mark L. Billy's NPI number?
- 1538143508. 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 L. Billy works
Medicare's Facility Affiliation Data lists Mark L. Billy at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- MH St Elizabeth Youngstown HospitalYoungstown, OH · Acute Care Hospital · CCN 360064
Practice locations
Addresses where Mark L. Billy is enrolled with Medicare (CMS data updated 2026-10-02).
- 5437 Mahoning Ave, Suite 12Austintown, OH 44515 (330) 792‑2501
- 7641 Market StBoardman, OH 44512 (330) 758‑6757
Group practices
Medicare enrollment lists Mark L. Billy as a member of this group (CMS data updated 2026-10-02).
- Mill Creek Oral and Maxillofacial Surgery Associates Inc3 clinicians in the group
Specialties
- Maxillofacial Surgeryprimary
Other maxillofacial surgeons in Ohio
Clinicians with the same Medicare primary specialty in Ohio — not a recommendation.
Clinician information
| Credential | DDS |
|---|---|
| Medical school | Ohio State University College Of Dentistry |
| Graduation year | 1986 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1538143508 |
| 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