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Gastroenterologists who accept Medicare in Fountain Valley, CA
CMS lists 15 clinicians in this specialty with a practice address in Fountain Valley. Accept Medicare assignment (the Medicare-approved amount as full payment): 13. Offer telehealth: 13.
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.
Dalia Al-Mudallal, MD
✓ Accepts Medicare assignmentMIPS score (2024): 100/100✓ TelehealthGraduated 2007 · Georgetown University School of MedicineFemaleDrug and device company payments (2025): $1,814Shruti M. Ariza, MD
✓ Accepts Medicare assignmentMIPS score (2024): 100/100✓ TelehealthGraduated 2005FemaleDrug and device company payments (2025): $1,757Huafeng Shen, MD
✓ Accepts Medicare assignmentMIPS score (2024): 100/100✓ TelehealthGraduated 2005MaleDrug and device company payments (2025): $2,214David B. Stanton, MD
✓ Accepts Medicare assignmentMIPS score (2024): 100/100✓ TelehealthGraduated 1981 · Tufts University School of MedicineMaleDrug and device company payments (2025): $440Lizhou Huang, MD
✓ Accepts Medicare assignmentMIPS score (2024): 87.2/100✓ TelehealthGraduated 2013 · Northwestern University Feinberg Medical SchoolMaleDrug and device company payments (2025): $435Jose Luis R. Aranez, MD
✓ Accepts Medicare assignment✓ TelehealthGraduated 2012MaleDrug and device company payments (2025): $895Erick Argueta, MD
✓ Accepts Medicare assignment✓ TelehealthGraduated 2017MaleDrug and device company payments (2025): $1,219Babak Firoozi, MD
✓ Accepts Medicare assignment✓ TelehealthGraduated 1995MaleDrug and device company payments (2025): $2,032Nancy Han, MD
✓ Accepts Medicare assignment✓ TelehealthGraduated 2005 · Ohio Medical UniversityFemaleDrug and device company payments (2025): $405Vincent W. Kao, DO
✓ Accepts Medicare assignment✓ TelehealthGraduated 2009MaleDrug and device company payments (2025): $741Truong-Sinh Leduc, MD
✓ Accepts Medicare assignmentGraduated 1983 · Rush Medical College of Rush UniversityMaleDrug and device company payments (2025): $11,449Duke H. Nguyen, MD
✓ Accepts Medicare assignment✓ TelehealthGraduated 1996MaleDrug and device company payments (2025): $12,048Ky-Dieu T. Tran, MD
✓ Accepts Medicare assignmentGraduated 2008 · University of Kansas School of Med (kc/wich/sal)FemaleOther offices in Fountain Valley: 1Drug and device company payments (2025): $3,212Brett W. Hughes, MD
May accept assignmentMIPS score (2024): 81.7/100✓ TelehealthGraduated 2017MaleDrug and device company payments (2025): $1,314Surinder S. Saini, MD
May accept assignmentMIPS score (2024): 25.9/100✓ TelehealthGraduated 1981MaleDrug and device company payments (2025): $38
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
- Ophthalmologists20
- Optometrists14
- Podiatrists5
- Pulmonologists11
- Nephrologists24
- 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).