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Orthopedic surgeons who accept Medicare in San Mateo, CA
CMS lists 18 clinicians in this specialty with a practice address in San Mateo. Accept Medicare assignment (the Medicare-approved amount as full payment): 16. Offer telehealth: 9.
Typical amounts Medicare approves in ZIP 94401 (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.
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Order: clinicians who accept assignment first, then by MIPS score (highest first), then by last name.
Kris Okumu, MD
✓ Accepts Medicare assignmentMIPS score (2024): 95.9/100Graduated 2001 · University of California, Davis School of MedicineMaleOther offices in San Mateo: 1Drug and device company payments (2025): $628Marvin Y. Lo, MD
✓ Accepts Medicare assignmentMIPS score (2024): 90.9/100Graduated 2002 · University of California, San Francisco School of MedicineMaleDrug and device company payments (2025): $29Dirk R. Diefendorf, MD
✓ Accepts Medicare assignmentMIPS score (2024): 88.9/100Graduated 1983 · Northwestern University Feinberg Medical SchoolMaleDennis C. Park, MD
✓ Accepts Medicare assignmentMIPS score (2024): 88.9/100Graduated 1999 · Northwestern University Feinberg Medical SchoolMaleDrug and device company payments (2025): $1,311Edward C. Sun, MD
✓ Accepts Medicare assignmentMIPS score (2024): 87.8/100✓ TelehealthGraduated 1996 · Harvard Medical SchoolMaleDrug and device company payments (2025): $74Gaurav Abbi, MD
✓ Accepts Medicare assignmentGraduated 2006MaleDrug and device company payments (2025): $1,303Monica Coughlan, MD
✓ Accepts Medicare assignment✓ TelehealthGraduated 2017FemaleOther offices in San Mateo: 1Drug and device company payments (2025): $180Debbie Y. Dang, MD
✓ Accepts Medicare assignment✓ TelehealthGraduated 2012FemaleOther offices in San Mateo: 1Andrew P. Gutow, MD
✓ Accepts Medicare assignment✓ TelehealthGraduated 1990 · University of Michigan Medical SchoolMaleDrug and device company payments (2025): $173James M. Hartford, MD
✓ Accepts Medicare assignment✓ TelehealthGraduated 1989 · Geisel School of Medicine at DartmouthMaleDrug and device company payments (2025): $788Noman Q. Khan, MD
✓ Accepts Medicare assignment✓ TelehealthGraduated 1990 · University of California, Davis School of MedicineMaleDuc Nguyen, MD
✓ Accepts Medicare assignment✓ TelehealthGraduated 1982 · University of California, Davis School of MedicineMaleJacqueline K. Nguyen, MD
✓ Accepts Medicare assignmentGraduated 2012 · Georgetown University School of MedicineFemaleOther offices in San Mateo: 3Drug and device company payments (2025): $398Aileen Shieu, MD
✓ Accepts Medicare assignmentGraduated 2001 · New York Medical CollegeFemaleOther offices in San Mateo: 1Akira Yamamoto, MD
✓ Accepts Medicare assignment✓ TelehealthGraduated 2006 · University of California, San Francisco School of MedicineMaleOther offices in San Mateo: 1Drug and device company payments (2025): $41Musa Zaid, MD
✓ Accepts Medicare assignment✓ TelehealthGraduated 2021MaleOther offices in San Mateo: 1Drug and device company payments (2025): $116Vishal Hegde, MD
May accept assignmentGraduated 2013MaleDrug and device company payments (2025): $6,161Alexander R. Markes, MD
May accept assignmentGraduated 2020 · University of California, San Francisco School of MedicineMaleDrug and device company payments (2025): $7,315
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 San Mateo
- Primary care doctors158
- Geriatricians3
- Nurse practitioners105
- Cardiologists38
- Dermatologists15
- Neurologists38
- Gastroenterologists7
- Ophthalmologists28
- Optometrists35
- Podiatrists13
- Urologists9
- Pulmonologists5
- Nephrologists8
- Endocrinologists4
- Rheumatologists9
- ENT doctors9
- Oncologists7
- Psychiatrists75
- Psychologists16
- Therapists and counselors51
- Physical therapists52
- Audiologists7
- Chiropractors22
- Gynecologists19
- General surgeons13
- Vascular surgeons7
- Physiatrists8
- Allergists14
- Dietitians3
- Neurosurgeons3
- Infectious disease doctors5
Other care in San Mateo
Hospitals · Nursing homes · Dialysis centers · Home health agencies · Hospices
Nearby cities
- Burlingame14
- San Carlos6
- Redwood City46
- South San Francisco8
- Menlo Park6
- Daly City12
- Stanford51
- Palo Alto36
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).