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Endocrinologists who accept Medicare in Westminster, CA
CMS lists 3 clinicians in this specialty with a practice address in Westminster. Accept Medicare assignment (the Medicare-approved amount as full payment): 3. Offer telehealth: 1.
Typical amounts Medicare approves in ZIP 92683 (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.
Andy V. Nguyen, DO
✓ Accepts Medicare assignmentGraduated 2016 · University of North Texas HSC, College of Osteopathic MedMaleDrug and device company payments (2025): $272Minhthao T. Nguyen, DO
✓ Accepts Medicare assignmentGraduated 2018 · At Still Un of Hlth Sciences, Col of Osteo Med, MesaFemaleOther offices in Westminster: 1Drug and device company payments (2025): $516Ole Saetrum Opgaard, MD
✓ Accepts Medicare assignment✓ TelehealthGraduated 1982MaleDrug and device company payments (2025): $708
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 Westminster
- Primary care doctors129
- Nurse practitioners31
- Cardiologists7
- Orthopedic surgeons4
- Ophthalmologists9
- Optometrists7
- Podiatrists3
- Pulmonologists5
- Oncologists3
- Psychiatrists8
- Therapists and counselors13
- Physical therapists8
- Chiropractors10
- Gynecologists4
- Pain management doctors3
- Physiatrists4
- Infectious disease doctors4
Other care in Westminster
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).