Tristan Zhang, MD

Medicare activity in 2024

Official CMS public-use data for Tristan Zhang, 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)729 services
2. Injection, dexamethasone sodium phosphate, 1 mg (J1100)266 services
3. Injection, triamcinolone acetonide, not otherwise specified, 10 mg (J3301)79 services
4. New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)46 services
5. Testing for presence of drug, read by direct observation (80305)37 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%
• Arthritis75%
• High cholesterol74%
• Depression35%
• Anxiety35%
• Diabetes30%

Hospitals where Tristan Zhang works

Medicare's Facility Affiliation Data lists Tristan Zhang 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.

• Goleta Valley Cottage HospitalSanta Barbara, CA · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 050357
• Marian Regional Medical CenterSanta Maria, CA · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 050107

Practice locations

Addresses where Tristan Zhang is enrolled with Medicare (CMS data updated October 2, 2026).

• 2725 16th StBakersfield, CA 93301 (805) 563‑3307
• 326 W Main St, Suite 120Santa Maria, CA 93458 (805) 563‑3307
• 401 E Carrillo StSanta Barbara, CA 93101 (805) 563‑3307

Group practices

Medicare enrollment lists Tristan Zhang as a member of this group (CMS data updated October 2, 2026).

• OSF Medical Group of California Inc6 clinicians in the group

Specialties

• Physical Medicine and Rehabilitationprimary

Find other Physical Medicine and Rehabilitation doctors in California →

Other rehabilitation doctors in Bakersfield

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

• Guixi Wang, MD
• Nirvi Shah, DO
• Alan Inocentes, MD
• Hector Moreno Rojas, MD
• Barry R. Chi, MD
• Bettina T. Limjoco, MD
• Kathy K. Chang
• Bradford A. Anderson, MD

All rehabilitation doctors in Bakersfield →

Other clinicians in OSF Medical Group of California Inc

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

• Alan P. Moelleken, MD
• Daniel A. Rafie, MD
• Noel A. Vierma, PA
• Richard J. Hartman, 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