Quick answers
- Which hospitals does Warren M. Butler work at?
- Medicare's official clinician data lists Warren M. Butler at 1 hospital: Chandler Regional Medical Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Warren M. Butler see patients?
- Medicare's clinician data lists 1 practice location in Phoenix, AZ. Call before your visit to confirm the address.
- What is Warren M. Butler's specialty?
- Medicare lists Internal Medicine as the primary specialty, and also Hospitalist.
- Does Warren M. Butler accept Medicare assignment?
- Yes. Medicare's clinician data says Warren M. Butler 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 Warren M. Butler?
- (480) 961-2303, as listed in official Medicare / NPI Registry data.
- What is Warren M. Butler's NPI number?
- 1750339784. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Warren M. Butler works
Medicare's Facility Affiliation Data lists Warren M. Butler at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Chandler Regional Medical CenterChandler, AZ · Acute Care Hospital · CCN 030036
Practice locations
Addresses where Warren M. Butler is enrolled with Medicare (CMS data updated 2026-10-02).
- 4530 E Muirwood Dr, Suite 105Phoenix, AZ 85048 (480) 961‑2303
Group practices
Medicare enrollment lists Warren M. Butler as a member of this group (CMS data updated 2026-10-02).
- Aia Hospitalists LLC53 clinicians in the group
Specialties
- Internal Medicineprimary
- Hospitalistalso
Other internal medicine doctors in Phoenix
Clinicians with the same Medicare primary specialty in Phoenix, AZ — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 2001 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1750339784 |
| 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