Quick answers
- Does Trevin B. Zarrinkelk accept Medicare assignment?
- Yes. Medicare's clinician data says Trevin B. Zarrinkelk accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
- How many Medicare patients does Trevin B. Zarrinkelk see?
- In 2024, CMS data shows 249 Original Medicare patients and 262 services for Trevin B. Zarrinkelk. This counts Original Medicare only and measures volume, not quality.
- What is Trevin B. Zarrinkelk's NPI number?
- 1891986287. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Medicare activity in 2024
Official CMS public-use data for Trevin B. Zarrinkelk, data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.
| Original Medicare patients | 249 |
|---|---|
| Services billed to Medicare | 262 |
| Different services or procedures | 12 |
| Participating Medicare provider | Yes |
| Average age of these patients | 73 |
Most frequent services
- Emergency department visit with high level of medical decision making (99285)187 services
- Emergency department visit with moderate level of medical decision making (99284)45 services
- Critical care, first 30-74 minutes (99291)15 services
Chronic conditions among these patients
Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).
- High blood pressure75%
- High cholesterol74%
- Arthritis53%
- Diabetes46%
- Ischemic heart disease45%
- Chronic kidney disease44%
Hospitals where Trevin B. Zarrinkelk works
Medicare's Facility Affiliation Data lists Trevin B. Zarrinkelk at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.
- Banner - University Medical Center PhoenixPhoenix, AZ · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 030002
- Banner Estrella Medical CenterPhoenix, AZ · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 030115
- Mountains Community HospitalLake Arrowhead, CA · Critical Access Hospital · Emergency services: listed by Medicare · CCN 051312
- Providence Mission HospitalMission Viejo, CA · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 050567
Practice locations
Addresses where Trevin B. Zarrinkelk is enrolled with Medicare (CMS data updated October 2, 2026).
- 1111 E McDowell RdPhoenix, AZ 85006 (954) 939‑5000
- 29101 Hospital RdLake Arrowhead, CA 92352 (909) 436‑3080
- 9201 W Thomas RdPhoenix, AZ 85037 (954) 939‑5000
Group practices
Medicare enrollment lists Trevin B. Zarrinkelk as a member of these groups (CMS data updated October 2, 2026).
- Emergency Professional Services PC108 clinicians in the group
- Elite Hospitalist Medical Group Inc15 clinicians in the group
Specialties
- Internal Medicineprimary
- Emergency Medicinealso
Other internal medicine doctors in Phoenix
Clinicians with the same Medicare primary specialty in Phoenix, AZ — not a recommendation.
Other clinicians in Emergency Professional Services PC
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | DO |
|---|---|
| Medical school | Arizona College Of Osteopathic Medicine Mid Western University |
| Graduation year | 2004 (22 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1891986287 |
| 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 October 2, 2026, retrieved October 29, 2026
- Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
- National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
- Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
- 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