Quick answers
- Which hospitals does William G. Alter work at?
- Medicare's official clinician data lists William G. Alter at 2 hospitals: Kettering Health Dayton and Kettering Health Main Campus. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does William G. Alter see patients?
- Medicare's clinician data lists 5 practice locations, including Dayton, OH, Kettering, OH and Middletown, OH. Call before your visit to confirm the address.
- What is William G. Alter's specialty?
- Medicare lists Obstetrics/Gynecology as the primary specialty.
- Does William G. Alter accept Medicare assignment?
- Yes. Medicare's clinician data says William G. Alter 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 William G. Alter?
- (937) 396-8150, as listed in official Medicare / NPI Registry data.
- What is William G. Alter's NPI number?
- 1669639779. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where William G. Alter works
Medicare's Facility Affiliation Data lists William G. Alter at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Kettering Health DaytonDayton, OH · Acute Care Hospital · CCN 360133
- Kettering Health Main CampusKettering, OH · Acute Care Hospital · CCN 360079
Practice locations
Addresses where William G. Alter is enrolled with Medicare (CMS data updated 2026-10-02).
- 165 Edwin C Moses Blvd, Cassano Comm Hlth CtDayton, OH 45407 (937) 396‑8150
- 4403 Far Hills AveKettering, OH 45429
- 4441 Far Hills AveKettering, OH 45429
- 6147 State Route 122Middletown, OH 45005
- 6147 W State Route 122, Suite 200Middletown, OH 45005 (937) 294‑4356
Group practices
Medicare enrollment lists William G. Alter as a member of these groups (CMS data updated 2026-10-02).
- Kettering Independent Medical Group Inc710 clinicians in the group
- Dayton Osteopathic Hospital36 clinicians in the group
Specialties
- Obstetrics/Gynecologyprimary
Other OB-GYNs in Dayton
Clinicians with the same Medicare primary specialty in Dayton, OH — not a recommendation.
Clinician information
| Credential | DO |
|---|---|
| Graduation year | 2006 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1669639779 |
| 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