Quick answers
- Which hospitals does William C. Oneill Iv work at?
- Medicare's official clinician data lists William C. Oneill Iv at 2 hospitals: Emory University Hospital and Emory University Hospital Midtown. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does William C. Oneill Iv see patients?
- Medicare's clinician data lists 1 practice location in Atlanta, GA. Call before your visit to confirm the address.
- What is William C. Oneill Iv's specialty?
- Medicare lists Nephrology as the primary specialty, and also Endocrinology.
- Does William C. Oneill Iv accept Medicare assignment?
- Yes. Medicare's clinician data says William C. Oneill Iv 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 C. Oneill Iv?
- (404) 778-7525, as listed in official Medicare / NPI Registry data.
- What is William C. Oneill Iv's NPI number?
- 1215049648. 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 C. Oneill Iv works
Medicare's Facility Affiliation Data lists William C. Oneill Iv at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Emory University HospitalAtlanta, GA · Acute Care Hospital · CCN 110010
- Emory University Hospital MidtownAtlanta, GA · Acute Care Hospital · CCN 110078
Practice locations
Addresses where William C. Oneill Iv is enrolled with Medicare (CMS data updated 2026-10-02).
- 1365 Clifton Rd NEAtlanta, GA 30322 (404) 778‑7525
Group practices
Medicare enrollment lists William C. Oneill Iv as a member of this group (CMS data updated 2026-10-02).
- The Emory Clinic Inc3,568 clinicians in the group
Specialties
- Nephrologyprimary
- Endocrinologyalso
Other nephrologists in Atlanta
Clinicians with the same Medicare primary specialty in Atlanta, GA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Tufts University School Of Medicine |
| Graduation year | 1979 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1215049648 |
| 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