Quick answers
- Where does Derek G. McAllister see patients?
- Medicare's clinician data lists 63 practice locations, including Flagstaff, AZ, Sun Lakes, AZ and Avondale, AZ. Call before your visit to confirm the address.
- What is Derek G. McAllister's specialty?
- Medicare lists Diagnostic Radiology as the primary specialty, and also Osteopathic Manipulative Medicine.
- Does Derek G. McAllister accept Medicare assignment?
- Yes. Medicare's clinician data says Derek G. McAllister 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 Derek G. McAllister?
- (928) 223-0200, as listed in official Medicare / NPI Registry data.
- What is Derek G. McAllister's NPI number?
- 1861832230. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Practice locations
Addresses where Derek G. McAllister is enrolled with Medicare (CMS data updated 2026-10-02). The first 5 of 63; the Medicare profile lists all.
- 1000 N Humphreys St, Suite 100Flagstaff, AZ 86001 (928) 223‑0200
- 10440 E Riggs Rd, 110 Simonmed Imaging Sun LakesSun Lakes, AZ 85248 (480) 883‑6860
- 10815 W McDowell Rd, 102 Simonmed Imaging AvondaleAvondale, AZ 85392 (623) 433‑0121
- 10825 W McDowell Rd, 110 Simonmed Imaging Avondale AkosAvondale, AZ 85392 (623) 251‑6030
- 1110 E Missouri Ave, 410 Simonmed Imaging Stand Up Open MriPhoenix, AZ 85014 (602) 274‑4674
Group practices
Medicare enrollment lists Derek G. McAllister as a member of these groups (CMS data updated 2026-10-02).
- Smi Imaging LLC384 clinicians in the group
- Simonmed Imaging Florida LLC317 clinicians in the group
- Health Diagnostics of California a Professional Corporation183 clinicians in the group
- Howard John Simon MD PC38 clinicians in the group
Specialties
Other radiologists in Flagstaff
Clinicians with the same Medicare primary specialty in Flagstaff, AZ — not a recommendation.
Clinician information
| Credential | DO |
|---|---|
| Medical school | Rocky Vista University College Of Osteopathic Med |
| Graduation year | 2013 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1861832230 |
| 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
- 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