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Gastroenterologists who accept Medicare in Santa Clara, CA
CMS lists 12 clinicians in this specialty with a practice address in Santa Clara. Accept Medicare assignment (the Medicare-approved amount as full payment): 12. Offer telehealth: 3.
Typical amounts Medicare approves in ZIP 95051 (2024 Medicare rates, the latest CMS has published): a new-patient visit $157, of which you pay about $39; a follow-up visit $122, of which you pay about $30 — the 20% coinsurance after the yearly Part B deductible. Clinicians who don't accept assignment can charge up to 15% more; with a Medicare Advantage plan, your plan's copay applies instead.
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Order: clinicians who accept assignment first, then by MIPS score (highest first), then by last name.
Michael S. Ahn, MD
✓ Accepts Medicare assignmentGraduated 1993 · University of Chicago, Pritzker School of MedicineMaleOther offices in Santa Clara: 1Gayatri Bharadhwaj
✓ Accepts Medicare assignment✓ TelehealthGraduated 1989FemaleOther offices in Santa Clara: 1Krisna P. Chai, MD
✓ Accepts Medicare assignment✓ TelehealthGraduated 2002 · Baylor College of MedicineMaleOther offices in Santa Clara: 1Jennifer T. Chang, MD
✓ Accepts Medicare assignmentGraduated 2008 · Columbia University College of Physicians and SurgeonsFemaleJenny Chen
✓ Accepts Medicare assignmentGraduated 2005FemaleOther offices in Santa Clara: 1Alan L. Chin, MD
✓ Accepts Medicare assignmentGraduated 1995MaleOther offices in Santa Clara: 1Caitlin C. Doan, MD
✓ Accepts Medicare assignment✓ TelehealthGraduated 1999 · University of California, Geffen School of MedicineFemaleOther offices in Santa Clara: 1Spencer T. Fung, MD
✓ Accepts Medicare assignmentGraduated 1994 · University of California, San Diego School of MedicineMaleOther offices in Santa Clara: 1Dan Li, MD
✓ Accepts Medicare assignmentGraduated 1996MaleOther offices in Santa Clara: 1Stephen L. Moff, MD
✓ Accepts Medicare assignmentGraduated 1999 · Duke University School of MedicineMaleOther offices in Santa Clara: 1Derrick Siao, MD
✓ Accepts Medicare assignmentGraduated 2008 · University of Michigan Medical SchoolMaleRaymond H. Tu, MD
✓ Accepts Medicare assignmentGraduated 1998 · Temple University School of MedicineMaleOther offices in Santa Clara: 1
Before you book
This list comes from Medicare's enrollment records, not from reviews. Call the office to confirm the clinician is taking new Medicare patients. With Original Medicare, a clinician who accepts assignment can only charge you the Medicare deductible and coinsurance; one who doesn't may charge up to 15% more than the Medicare-approved amount. If you have a Medicare Advantage plan, check that the clinician is in the plan's network.
The MIPS final score (0–100) comes from Medicare's Merit-based Incentive Payment System for 2024. It combines quality measures, cost, improvement activities and use of certified health records, and it sets a payment adjustment. Clinicians who report as a group share the group's score. It is not a patient rating, and many clinicians have no published score.
Payments from drug and medical device companies come from CMS Open Payments (2025 general payments: meals, travel, consulting and speaking fees, gifts and similar), summed for each clinician. Receiving payments is legal and common and does not mean a clinician did anything wrong.
Other specialists in Santa Clara
- Primary care doctors408
- Nurse practitioners82
- Cardiologists51
- Dermatologists15
- Orthopedic surgeons26
- Neurologists12
- Ophthalmologists31
- Optometrists47
- Podiatrists11
- Urologists15
- Pulmonologists7
- Nephrologists6
- Endocrinologists5
- ENT doctors15
- Oncologists13
- Psychiatrists23
- Psychologists59
- Therapists and counselors603
- Physical therapists30
- Chiropractors11
- Gynecologists54
- General surgeons17
- Vascular surgeons5
- Physiatrists9
- Infectious disease doctors5
Other care in Santa Clara
Hospitals · Nursing homes · Dialysis centers · Home health agencies · Hospices
Nearby cities
Enrollment, addresses and scores are as reported to CMS and can change. This is not a list of in-network providers for any Medicare Advantage plan, and it is not medical advice. Source: CMS Provider Data Catalog — Doctors and Clinicians National Downloadable File, Clinician MIPS Performance 2024 and Facility Affiliation Data (released Oct 2, 2026).