Brian N. Casillas, MD

Medicare activity in 2024

Official CMS public-use data for Brian N. Casillas, 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.

Most frequent services

1. Emergency department visit with high level of medical decision making (99285)131 services
2. Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only (93010)49 services
3. Emergency department visit with moderate level of medical decision making (99284)20 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 cholesterol75%
• Arthritis55%
• Ischemic heart disease48%
• Diabetes44%
• Chronic kidney disease42%

Hospitals where Brian N. Casillas works

Medicare's Facility Affiliation Data lists Brian N. Casillas 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.

• Abrazo Arrowhead HospitalGlendale, AZ · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 030094
• Abrazo West CampusGoodyear, AZ · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 030110
• Banner Desert Medical CenterMesa, AZ · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 030065

Practice locations

Addresses where Brian N. Casillas is enrolled with Medicare (CMS data updated October 2, 2026).

• 1400 S Dobson RdMesa, AZ 85202 (480) 412‑3000
• 1930 E Thomas RdPhoenix, AZ 85016 (602) 532‑1000
• 2000 W Bethany Home RdPhoenix, AZ 85015 (602) 249‑0212

Group practices

Medicare enrollment lists Brian N. Casillas as a member of these groups (CMS data updated October 2, 2026).

• Emergency Group of Arizona Professional Corporation105 clinicians in the group
• Cep America- Arizona, PC93 clinicians in the group

Specialties

• Emergency Medicineprimary

Find other Emergency Medicine doctors in Arizona →

Other emergency medicine doctors in Mesa

Clinicians with the same Medicare primary specialty in Mesa, AZ — not a recommendation.

• Grant R. Depoy, DO
• Matthew F. McDowell, DO
• Taylor J. Kallas, MD
• Kevin J. Craig, MD
• Raven Crusco, MD
• Christopher Koehler, MD
• Joshua R. Rayburn, MD
• Brian Jahnny, DO

All emergency medicine doctors in Mesa →

Other clinicians in Emergency Group of Arizona Professional Corporation

Medicare enrollment lists these clinicians in the same group practice — not a recommendation.

• Samuel Richardson, DO
• Jacob D. Shank, MD
• Ryan T. Timothy, DO
• Kevin Yow, MD
• Kimberly Weidenbach, MD
• Stephanie Sperrazza, DO

Clinician information

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

1. Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
2. Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
3. National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
4. Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
5. NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
6. Medicare Care Compare — official Medicare tool to look up clinicians