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Nephrologists who accept Medicare in Fountain Valley, CA
CMS lists 24 clinicians in this specialty with a practice address in Fountain Valley. Accept Medicare assignment (the Medicare-approved amount as full payment): 23. Offer telehealth: 21.
Typical amounts Medicare approves in ZIP 92708 (2024 Medicare rates, the latest CMS has published): a new-patient visit $142, of which you pay about $36; a follow-up visit $110, of which you pay about $27 — 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.
Jennifer Pham, MD
✓ Accepts Medicare assignmentMIPS score (2024): 29.7/100✓ TelehealthGraduated 2017FemaleDrug and device company payments (2025): $666Zavier S. Ahmed, MD
✓ Accepts Medicare assignment✓ TelehealthGraduated 2012MaleDrug and device company payments (2025): $439Zaid Al-Dahhan, MD
✓ Accepts Medicare assignment✓ TelehealthGraduated 2017MaleDrug and device company payments (2025): $134Mark M. Boiskin, MD
✓ Accepts Medicare assignment✓ TelehealthGraduated 1986MaleDrug and device company payments (2025): $249Alan A. Cantillep, MD
✓ Accepts Medicare assignment✓ TelehealthGraduated 2011 · Michigan State University College of Human MedicineMaleDrug and device company payments (2025): $34Thanh Cao, DO
✓ Accepts Medicare assignment✓ TelehealthGraduated 2016MaleDrug and device company payments (2025): $766Sandeep S. Dang, MD
✓ Accepts Medicare assignment✓ TelehealthGraduated 2001MaleDrug and device company payments (2025): $77Son T. Dinh, MD
✓ Accepts Medicare assignmentGraduated 2002MaleDrug and device company payments (2025): $321Arman Faravardeh, MD
✓ Accepts Medicare assignment✓ TelehealthGraduated 2000 · Medical College of WisconsinMaleDrug and device company payments (2025): $365Joshua K. Greenstein, MD
✓ Accepts Medicare assignment✓ TelehealthGraduated 1998MaleJoginder Jodhka, MD
✓ Accepts Medicare assignment✓ TelehealthGraduated 1979MaleDrug and device company payments (2025): $142Daniel T. Leininger, DO
✓ Accepts Medicare assignment✓ TelehealthGraduated 2017MaleDrug and device company payments (2025): $45Andrew C. Liu, MD
✓ Accepts Medicare assignment✓ TelehealthGraduated 2018MaleDrug and device company payments (2025): $160Gaytri Manek, MD
✓ Accepts Medicare assignment✓ TelehealthGraduated 2003FemaleDrug and device company payments (2025): $146Tarun Marwaha, MD
✓ Accepts Medicare assignment✓ TelehealthGraduated 1996MaleDrug and device company payments (2025): $438Essam A. Mostafa, MD
✓ Accepts Medicare assignmentGraduated 1992MaleDrug and device company payments (2025): $57John Ong, DO
✓ Accepts Medicare assignment✓ TelehealthGraduated 2020MaleDrug and device company payments (2025): $1,393Sina Rahimi, DO
✓ Accepts Medicare assignment✓ TelehealthGraduated 2016 · Rowan University School of Osteopathic MedicineMaleDrug and device company payments (2025): $125Ajit S. Sawhney, MD
✓ Accepts Medicare assignment✓ TelehealthGraduated 1968MaleDrug and device company payments (2025): $134Sajeet S. Sawhney, MD
✓ Accepts Medicare assignment✓ TelehealthGraduated 2010MaleDrug and device company payments (2025): $179Nasim Shahbazi, MD
✓ Accepts Medicare assignment✓ TelehealthGraduated 1998FemaleDrug and device company payments (2025): $34Philip S. Yang, MD
✓ Accepts Medicare assignmentGraduated 2002MaleDrug and device company payments (2025): $528Yan Zhong, MD
✓ Accepts Medicare assignment✓ TelehealthGraduated 2000FemaleDrug and device company payments (2025): $164Stephen C. Lui, MD
May accept assignment✓ TelehealthGraduated 2002 · University of Chicago, Pritzker School of MedicineMaleDrug and device company payments (2025): $129
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 Fountain Valley
- Primary care doctors109
- Nurse practitioners57
- Cardiologists21
- Dermatologists5
- Orthopedic surgeons27
- Neurologists22
- Gastroenterologists15
- Ophthalmologists20
- Optometrists14
- Podiatrists5
- Pulmonologists11
- Endocrinologists3
- ENT doctors4
- Oncologists25
- Psychiatrists3
- Psychologists9
- Therapists and counselors9
- Physical therapists39
- Occupational therapists5
- Chiropractors18
- Gynecologists26
- General surgeons19
- Vascular surgeons3
- Pain management doctors4
- Physiatrists5
- Dietitians6
- Neurosurgeons3
- Infectious disease doctors6
Other care in Fountain Valley
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).