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Oncologists who accept Medicare in Reston, VA
CMS lists 10 clinicians in this specialty with a practice address in Reston. Accept Medicare assignment (the Medicare-approved amount as full payment): 10. Offer telehealth: 8.
Typical amounts Medicare approves in ZIP 20190 (2024 Medicare rates, the latest CMS has published): a new-patient visit $195, of which you pay about $49; a follow-up visit $114, of which you pay about $28 — 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.
Ravneet Grewal, MD
✓ Accepts Medicare assignmentMIPS score (2024): 96/100✓ TelehealthGraduated 1994FemaleDrug and device company payments (2025): $217Syed S. Ali, MD
✓ Accepts Medicare assignmentMIPS score (2024): 92.7/100Graduated 2003 · New York Medical CollegeMaleDrug and device company payments (2025): $330Mei-Hwa R. Firestone, MD
✓ Accepts Medicare assignmentMIPS score (2024): 92.7/100Graduated 2009 · Georgetown University School of MedicineFemaleDrug and device company payments (2025): $332Christina E. Brzezniak, DO
✓ Accepts Medicare assignment✓ TelehealthGraduated 2007 · Lake Erie College of Osteopathic Medicine, ErieFemaleDrug and device company payments (2025): $528Ajay Dar, MD
✓ Accepts Medicare assignment✓ TelehealthGraduated 1984MaleDrug and device company payments (2025): $343Kevin Diasti, MD
✓ Accepts Medicare assignment✓ TelehealthGraduated 2018 · Georgetown University School of MedicineMaleDrug and device company payments (2025): $477Timothy A. McCarthy, MD
✓ Accepts Medicare assignment✓ TelehealthGraduated 2009 · Rutgers, Robert Woood Johnson Medical SchoolMaleDrug and device company payments (2025): $745Amitabha Sarma, MD
✓ Accepts Medicare assignment✓ TelehealthGraduated 1998 · Baylor College of MedicineMaleDrug and device company payments (2025): $617Shruti R. Tiwari, MD
✓ Accepts Medicare assignment✓ TelehealthGraduated 2008FemaleDrug and device company payments (2025): $1,544Chao Yin, MD
✓ Accepts Medicare assignment✓ TelehealthGraduated 2016 · Georgetown University School of MedicineMaleDrug and device company payments (2025): $1,367
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 Reston
- Primary care doctors100
- Nurse practitioners96
- Cardiologists35
- Dermatologists15
- Orthopedic surgeons34
- Neurologists8
- Gastroenterologists11
- Ophthalmologists29
- Optometrists20
- Podiatrists9
- Urologists24
- Pulmonologists4
- Endocrinologists3
- Rheumatologists3
- ENT doctors7
- Psychiatrists19
- Psychologists10
- Therapists and counselors45
- Physical therapists85
- Occupational therapists34
- Speech therapists14
- Audiologists10
- Chiropractors12
- Gynecologists22
- General surgeons17
- Vascular surgeons4
- Pain management doctors3
- Physiatrists9
- Allergists3
- Dietitians3
- Neurosurgeons3
Other care in Reston
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).