Quick answers
- Which hospitals does William M. Warren work at?
- Medicare's official clinician data lists William M. Warren at 2 hospitals: National Park Medical Center and North Arkansas Regional Medical Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does William M. Warren see patients?
- Medicare's clinician data lists 5 practice locations, including Hot Springs, AR, Harrison, AR and Little Rock, AR. Call before your visit to confirm the address.
- What is William M. Warren's specialty?
- Medicare lists Certified Registered Nurse Anesthetist (CRNA) as the primary specialty.
- Does William M. Warren accept Medicare assignment?
- Yes. Medicare's clinician data says William M. Warren 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 M. Warren?
- (501) 321-1000, as listed in official Medicare / NPI Registry data.
- What is William M. Warren's NPI number?
- 1306141825. 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 M. Warren works
Medicare's Facility Affiliation Data lists William M. Warren at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- National Park Medical CenterHot Springs, AR · Acute Care Hospital · CCN 040078
- North Arkansas Regional Medical CenterHarrison, AR · Acute Care Hospital · CCN 040017
Practice locations
Addresses where William M. Warren is enrolled with Medicare (CMS data updated 2026-10-02).
- 1910 Malvern AveHot Springs, AR 71901 (501) 321‑1000
- 620 N Mail StHarrison, AR 72601
- 620 N Main St, Second FloorHarrison, AR 72601 (870) 414‑4000
- 620 N WillowHarrison, AR 72601 (870) 414‑4000
- 8820 Knoedl CtLittle Rock, AR 72205 (501) 224‑6767
Group practices
Medicare enrollment lists William M. Warren as a member of these groups (CMS data updated 2026-10-02).
- North Arkansas Regional Medical Center82 clinicians in the group
- Ouachita Regional Anesthesia PLLC18 clinicians in the group
Specialties
Find other clinicians: Certified Registered Nurse Anesthetist (CRNA), Arkansas →
Other nurse anesthetists in Hot Springs
Clinicians with the same Medicare primary specialty in Hot Springs, AR — not a recommendation.
Clinician information
| Credential | CNA |
|---|---|
| Graduation year | 2010 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1306141825 |
| 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