Home › Doctors › California › Walnut Creek › General surgeons
General surgeons who accept Medicare in Walnut Creek, CA
CMS lists 32 clinicians in this specialty with a practice address in Walnut Creek. Accept Medicare assignment (the Medicare-approved amount as full payment): 25. Offer telehealth: 7.
Typical amounts Medicare approves in ZIP 94596 (2024 Medicare rates, the latest CMS has published): a new-patient visit $105, of which you pay about $26; a follow-up visit $85, of which you pay about $21 — 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.
Is this your organization or practice? Feature it at the top of this page — $49 for 30 days →
Order: clinicians who accept assignment first, then by MIPS score (highest first), then by last name.
Brian T. Chin, MD
✓ Accepts Medicare assignmentMIPS score (2024): 100/100Graduated 2000 · University of Michigan Medical SchoolMaleOther offices in Walnut Creek: 2Drug and device company payments (2025): $24Michael B. Peterson, MD
✓ Accepts Medicare assignmentMIPS score (2024): 100/100Graduated 1980 · University of California, Davis School of MedicineMaleDrug and device company payments (2025): $50Jason F. Moy, MD
✓ Accepts Medicare assignmentMIPS score (2024): 99.6/100Graduated 2001 · Michigan State University College of Human MedicineMaleOther offices in Walnut Creek: 3Drug and device company payments (2025): $9,318Rock C. Liu, MD
✓ Accepts Medicare assignmentMIPS score (2024): 99.4/100✓ TelehealthGraduated 1999 · Ohio State University College of MedicineMaleOther offices in Walnut Creek: 2Drug and device company payments (2025): $214,852Ran Kim, MD
✓ Accepts Medicare assignmentMIPS score (2024): 91/100✓ TelehealthGraduated 1990 · Medical College of PennsylvaniaMaleOther offices in Walnut Creek: 3Drug and device company payments (2025): $1,651Charleen L. Kim, MD
✓ Accepts Medicare assignmentMIPS score (2024): 90.3/100✓ TelehealthGraduated 2004 · Saint Louis University School of MedicineFemaleDrug and device company payments (2025): $105Ben Schwab, MD
✓ Accepts Medicare assignmentMIPS score (2024): 90.3/100Graduated 2012MaleDrug and device company payments (2025): $1,847Steven M. Young, MD
✓ Accepts Medicare assignmentMIPS score (2024): 90.3/100✓ TelehealthGraduated 1999 · New York Medical CollegeMaleDrug and device company payments (2025): $20,828Fredrick Amog, MD
✓ Accepts Medicare assignmentGraduated 2002MaleDrug and device company payments (2025): $1,327Gregory A. Broderick Villa, MD
✓ Accepts Medicare assignmentGraduated 2001 · Tufts University School of MedicineMaleMary K. Cardoza, MD
✓ Accepts Medicare assignmentGraduated 1987 · University of California, Geffen School of MedicineFemaleOther offices in Walnut Creek: 2Drug and device company payments (2025): $28Anita K. Chiu, MD
✓ Accepts Medicare assignmentGraduated 2004FemaleDrug and device company payments (2025): $210Jeffrey Douaiher, MD
✓ Accepts Medicare assignmentGraduated 2011MaleWilliam M. Greif, MD
✓ Accepts Medicare assignmentGraduated 1993 · Stanford University School of MedicineMaleRabab F. Hashim, MD
✓ Accepts Medicare assignmentGraduated 1994MaleTeresa H. Kim, MD
✓ Accepts Medicare assignmentGraduated 1999 · University of Massachusetts Medical SchoolFemaleDrug and device company payments (2025): $31Diane Kwan, MD
✓ Accepts Medicare assignment✓ TelehealthGraduated 2006 · Chicago College of Medicine and SurgeryFemaleDrug and device company payments (2025): $34,699Kathleen M. Manning, MD
✓ Accepts Medicare assignmentGraduated 1996 · Boston University School of MedicineFemaleDrug and device company payments (2025): $37Peter J. Mazolewski, MD
✓ Accepts Medicare assignmentGraduated 1994 · University of Southern California Keck School of MedicineMaleDrug and device company payments (2025): $16,996Omar I. Mian, MD
✓ Accepts Medicare assignmentGraduated 2005MaleAileen A. Murphy, DO
✓ Accepts Medicare assignment✓ TelehealthGraduated 2008FemaleDrug and device company payments (2025): $33,493Dinh N. Nguyen, MD
✓ Accepts Medicare assignmentGraduated 1995 · University of Michigan Medical SchoolMaleRichard T. Nguyen, DO
✓ Accepts Medicare assignment✓ TelehealthGraduated 2001MaleOther offices in Walnut Creek: 1Drug and device company payments (2025): $41,351Jenny J. Sung, MD
✓ Accepts Medicare assignmentGraduated 2000 · State University of NY Upstate Medical UniversityFemaleDrug and device company payments (2025): $259Jonathan T. Wong, MD
✓ Accepts Medicare assignmentGraduated 1996 · Virginia Commonwealth University, School of MedicineMaleDrug and device company payments (2025): $148Joseph Brandel, MD
May accept assignmentMIPS score (2024): 83.6/100Graduated 1999MaleOther offices in Walnut Creek: 2Drug and device company payments (2025): $2,693Michael W. Deboisblanc, MD
May accept assignmentMIPS score (2024): 83.6/100Graduated 2000 · Tulane University School of MedicineMaleOther offices in Walnut Creek: 3Drug and device company payments (2025): $403Rafael F. Diaz Flores, MD
May accept assignmentMIPS score (2024): 83.6/100Graduated 2003MaleOther offices in Walnut Creek: 2Drug and device company payments (2025): $14,662Michael Esparza, MD
May accept assignmentMIPS score (2024): 83.6/100Graduated 2014MaleDrug and device company payments (2025): $210Sean P. Martin, MD
May accept assignmentMIPS score (2024): 83.6/100Graduated 2004 · Uniformed Services Uhs Fe Hebert School of MedMaleOther offices in Walnut Creek: 2Drug and device company payments (2025): $3,474Isabelle A. Struve, MD
May accept assignmentMIPS score (2024): 83.6/100Graduated 2017 · University of California, Davis School of MedicineFemaleOther offices in Walnut Creek: 1Drug and device company payments (2025): $16,976John U. Zink, MD
May accept assignmentMIPS score (2024): 83.6/100Graduated 2007 · University of Southern California Keck School of MedicineMaleOther offices in Walnut Creek: 4Drug and device company payments (2025): $4,428
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 Walnut Creek
- Primary care doctors257
- Nurse practitioners111
- Cardiologists27
- Dermatologists50
- Orthopedic surgeons54
- Neurologists42
- Gastroenterologists32
- Ophthalmologists34
- Optometrists20
- Podiatrists36
- Urologists18
- Pulmonologists22
- Nephrologists14
- Endocrinologists7
- Rheumatologists14
- ENT doctors35
- Oncologists11
- Psychiatrists84
- Psychologists42
- Therapists and counselors61
- Physical therapists88
- Occupational therapists17
- Speech therapists4
- Audiologists3
- Chiropractors32
- Gynecologists40
- Vascular surgeons14
- Pain management doctors19
- Physiatrists24
- Allergists15
- Dietitians5
- Neurosurgeons5
- Infectious disease doctors13
Other care in Walnut Creek
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).