Brett G. Hadley, DO

Medicare activity in 2024

Official CMS public-use data for Brett G. Hadley, 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)245 services
2. Emergency department visit with moderate level of medical decision making (99284)146 services
3. Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only (93010)108 services
4. Critical care, first 30-74 minutes (99291)44 services
5. Emergency department visit with low level of medical decision making (99283)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%
• Arthritis54%
• Ischemic heart disease45%
• Diabetes42%
• Chronic kidney disease34%

Hospitals where Brett G. Hadley works

Medicare's Facility Affiliation Data lists Brett G. Hadley 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.

• Palmdale Regional Medical CenterPalmdale, CA · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 050204
• Southwest Healthcare Rancho Springs HospitalMurrieta, CA · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 050701

Practice locations

Addresses where Brett G. Hadley is enrolled with Medicare (CMS data updated October 2, 2026).

• 36485 Inland Valley DrWildomar, CA 92595 (951) 677‑1111
• 38600 Medical Ctr DrPalmdale, CA 93551 (661) 382‑5000

Group practices

Medicare enrollment lists Brett G. Hadley as a member of this group (CMS data updated October 2, 2026).

• Em Alliance California Apc68 clinicians in the group

Specialties

• Emergency Medicineprimary

Find other Emergency Medicine doctors in California →

Other emergency medicine doctors in Wildomar

Clinicians with the same Medicare primary specialty in Wildomar, CA — not a recommendation.

• Spencer Rushton, DO
• Taylor Bashara, MD
• Taylor Fernberg, MD
• Andrew M. Wayment, MD
• Shon M. Sidransky, MD
• Elizabeth O. Marquart, MD
• Elizabeth A. Buckalew, DO
• Calvin J. Woodard, MD

All emergency medicine doctors in Wildomar →

Other clinicians in Em Alliance California Apc

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

• Spencer Rushton, DO
• Taylor Bashara, MD
• Taylor Fernberg, MD
• Charles O. Otieno, MD
• Dylan D. Mann, MD
• Christopher Kocharians, MD

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