Robert L. Gay Iii, MD

Medicare activity in 2024

Official CMS public-use data for Robert L. Gay Iii, 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. Anesthesia for other procedure on esophagus, stomach, or upper small bowel using an endoscope (00731)39 services
2. Anesthesia for procedure for total knee joint replacement (01402)38 services
3. Continuous infusion of anesthetic agent and/or steroid into thigh nerve (femoral nerve) through catheter (64448)22 services
4. Anesthesia for other procedure on large bowel using an endoscope (00811)20 services
5. Anesthesia for procedure on small and large bowel using an endoscope (00813)12 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%
• Arthritis61%
• Atrial fibrillation30%
• Depression29%
• Chronic kidney disease28%

Hospitals where Robert L. Gay Iii works

Medicare's Facility Affiliation Data lists Robert L. Gay Iii 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.

• John Muir Medical Center - Concord CampusConcord, CA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 050496
• John Muir Medical Center - Walnut Creek CampusWalnut Creek, CA · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 050180

Practice locations

Addresses where Robert L. Gay Iii is enrolled with Medicare (CMS data updated October 2, 2026).

• 1601 Ygnacio Valley RdWalnut Creek, CA 94598 (925) 939‑3000
• 1601 Ygnacio Vly RdWalnut Creek, CA 94596 (925) 939‑3000
• 2000 Mowry AveFremont, CA 94538 (510) 797‑1111
• 2540 E StConcord, CA 94520 (925) 682‑8200

Group practices

Medicare enrollment lists Robert L. Gay Iii as a member of these groups (CMS data updated October 2, 2026).

• Cep America - Anesthesia PC849 clinicians in the group
• John Muir Trauma Physicians Billing Service113 clinicians in the group

Specialties

• Anesthesiologyprimary

Find other Anesthesiology doctors in California →

Other anesthesiologists in Walnut Creek

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

• Timothy D. Ungerer, DO
• Edward Y. Cha, MD
• Divakar Joshi, DO
• Christina H. Lee, MD
• Richard Nguyen, DO
• Miguel Valencia, DO
• Morgan A. Welch, DO
• Shannon W. Schwenke, MD

All anesthesiologists in Walnut Creek →

Other clinicians in Cep America - Anesthesia PC

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

• Dominic G. Di Tomasso, MD
• Gene Booth, CNA
• Dawson B. Cabbage, CNA
• Jeanette Bailey, CNA
• Mohammad A. Qadeer, MD
• Robin Patel, 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