Hamid R. Rassai, MD

Medicare activity in 2024

Official CMS public-use data for Hamid R. Rassai, 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. Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)300 services
2. Removal of skin and tissue, 20.0 sq cm or less (11042)181 services
3. Ultrasound study of one arm or leg veins with compression and maneuvers (93971)149 services
4. Chemical destruction of first incompetent vein of arm or leg using imaging guidance (36482)129 services
5. Ultrasound study of arm or leg veins with compression and maneuvers (93970)125 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%
• Arthritis59%
• Diabetes45%
• Chronic kidney disease34%
• Anxiety33%

Hospitals where Hamid R. Rassai works

Medicare's Facility Affiliation Data lists Hamid R. Rassai 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
• Sutter Delta Medical CenterAntioch, CA · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 050523

Practice locations

Addresses where Hamid R. Rassai is enrolled with Medicare (CMS data updated October 2, 2026).

• 2350 Country Hills Dr, Suite AAntioch, CA 94509 (925) 757‑0800

Group practices

Medicare enrollment lists Hamid R. Rassai as a member of this group (CMS data updated October 2, 2026).

• Bass Medical Group291 clinicians in the group

Specialties

• General Surgeryprimary

Find other General Surgery doctors in California →

Other general surgeons in Antioch

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

• Peyman Lavi, MD
• Anika Singh, MD
• Edward Chau, MD
• Christopher L. Solis, MD
• Robert L. Bell, MD
• Wayne S. Lee, MD
• Aaron B. Chin, MD
• Jacob Spivak, MD

All general surgeons in Antioch →

Other clinicians in Bass Medical Group

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

• Jane K. Simard, PA
• Robert A. Hardy, MD
• Jeffrey G. Blue, MD
• Caroline A. Perry, MD
• Ricardo W. Contreras, PT
• Nicole C. Indart

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