Quick answers
- Does Gabriel A. Reyes accept Medicare assignment?
- Yes. Medicare's clinician data says Gabriel A. Reyes 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 Gabriel A. Reyes see?
- In 2024, CMS data shows 275 Original Medicare patients and 469 services for Gabriel A. Reyes. This counts Original Medicare only and measures volume, not quality.
- What is Gabriel A. Reyes's NPI number?
- 1891157269. 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 Gabriel A. Reyes, 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 | 275 |
|---|---|
| Services billed to Medicare | 469 |
| Different services or procedures | 78 |
| Participating Medicare provider | Yes |
| Average age of these patients | 76 |
Most frequent services
- Insertion of artery tube for blood sampling or infusion through skin (36620)30 services
- Anesthesia for other procedure on esophagus, stomach, or upper small bowel using an endoscope (00731)23 services
- Ultrasonic guidance for blood vessel access (76937)21 services
- Injection of anesthetic agent and/or steroid into thigh nerve (femoral nerve) (64447)19 services
- Anesthesia for lens surgery (00142)18 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%
- Arthritis60%
- Ischemic heart disease39%
- Atrial fibrillation38%
- Diabetes29%
Hospitals where Gabriel A. Reyes works
Medicare's Facility Affiliation Data lists Gabriel A. Reyes 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.
- Providence Mission HospitalMission Viejo, CA · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 050567
- UCI Health-OrangeOrange, CA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 050348
Practice locations
Addresses where Gabriel A. Reyes is enrolled with Medicare (CMS data updated October 2, 2026).
- 101 the City Dr SOrange, CA 92868 (714) 456‑7004
- 27700 Medical Ctr RdMission Viejo, CA 92691 (949) 364‑1400
Group practices
Medicare enrollment lists Gabriel A. Reyes as a member of these groups (CMS data updated October 2, 2026).
- Regents of the University of239 clinicians in the group
- Western Anesthesia Medical Associates Inc49 clinicians in the group
Specialties
- Anesthesiologyprimary
Other anesthesiologists in Orange
Clinicians with the same Medicare primary specialty in Orange, CA — not a recommendation.
Other clinicians in Regents of the University of
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of California, San Francisco School Of Medicine |
| Graduation year | 2016 (10 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1891157269 |
| 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