Quick answers
- Which hospitals does William W. Greenfield work at?
- Medicare's official clinician data lists William W. Greenfield at 1 hospital: University of Arkansas Medical Sciences. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does William W. Greenfield see patients?
- Medicare's clinician data lists 2 practice locations, including Little Rock, AR. Call before your visit to confirm the address.
- What is William W. Greenfield's specialty?
- Medicare lists Obstetrics/Gynecology as the primary specialty.
- Does William W. Greenfield accept Medicare assignment?
- Medicare's clinician data says William W. Greenfield may accept Medicare assignment (as of 2026-10-02). Ask the office whether they accept it for your visit.
- What is the phone number for William W. Greenfield?
- (501) 686-8000, as listed in official Medicare / NPI Registry data.
- What is William W. Greenfield's NPI number?
- 1124118617. 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 W. Greenfield works
Medicare's Facility Affiliation Data lists William W. Greenfield at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- University of Arkansas Medical SciencesLittle Rock, AR · Acute Care Hospital · CCN 040016
Practice locations
Addresses where William W. Greenfield is enrolled with Medicare (CMS data updated 2026-10-02).
- 4301 W Markam StLittle Rock, AR 72205 (501) 686‑8000
- 4815 W Markham StLittle Rock, AR 72205 (501) 661‑2000
Group practices
Medicare enrollment lists William W. Greenfield as a member of these groups (CMS data updated 2026-10-02).
- University of Arkansas for Medical Sciences1,175 clinicians in the group
- Arkansas Department of Health Payroll Office30 clinicians in the group
Specialties
- Obstetrics/Gynecologyprimary
Other OB-GYNs in Little Rock
Clinicians with the same Medicare primary specialty in Little Rock, AR — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Meharry Medical College School Of Medicine |
| Graduation year | 1999 |
| Gender (as listed) | Male |
| Medicare assignment | May accept for some services |
| NPI (National Provider Identifier) | 1124118617 |
| 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