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Gastroenterologists who accept Medicare in Waco, TX
CMS lists 14 clinicians in this specialty with a practice address in Waco. Accept Medicare assignment (the Medicare-approved amount as full payment): 14. Offer telehealth: 5.
Typical amounts Medicare approves in ZIP 76712 (2024 Medicare rates, the latest CMS has published): a new-patient visit $126, of which you pay about $32; a follow-up visit $97, of which you pay about $24 — 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.
James W. Boss, MD
✓ Accepts Medicare assignmentMIPS score (2024): 75/100Graduated 1989 · University of Texas Medical Branch at GalvestonMaleDrug and device company payments (2025): $325Edward D. Contreras, MD
✓ Accepts Medicare assignmentMIPS score (2024): 75/100Graduated 1988 · University of Texas Medical School at San AntonioMaleDrug and device company payments (2025): $395Bryan J. Hanysak, MD
✓ Accepts Medicare assignmentMIPS score (2024): 75/100Graduated 2002 · University of Texas Medical School at San AntonioMaleOther offices in Waco: 4Drug and device company payments (2025): $1,200Hanumantha R. Ancha, MD
✓ Accepts Medicare assignmentGraduated 1995MaleDrug and device company payments (2025): $960Hari B. Ancha, MD
✓ Accepts Medicare assignmentGraduated 1985MaleDrug and device company payments (2025): $1,145Christopher Johnson, MD
✓ Accepts Medicare assignment✓ TelehealthGraduated 2011 · University of Illinois College of Med (chi/peor/rock/chm-Urb)MaleDrug and device company payments (2025): $455Shamyal H. Khan, DO
✓ Accepts Medicare assignmentGraduated 2015 · University of North Texas HSC, College of Osteopathic MedMaleOther offices in Waco: 4Drug and device company payments (2025): $627Christina A. Levings, MD
✓ Accepts Medicare assignmentGraduated 2001 · Tulane University School of MedicineFemaleDrug and device company payments (2025): $969Megan E. Lewis, DO
✓ Accepts Medicare assignment✓ TelehealthGraduated 2018 · University of North Texas HSC, College of Osteopathic MedFemaleDrug and device company payments (2025): $1,417Apurva A. Modi, MD
✓ Accepts Medicare assignment✓ TelehealthGraduated 2000MaleDrug and device company payments (2025): $227,798Charles B. Rives, MD
✓ Accepts Medicare assignmentGraduated 2013 · University of Texas Medical School at San AntonioMaleDrug and device company payments (2025): $1,365Niket Sonpal, MD
✓ Accepts Medicare assignment✓ TelehealthGraduated 2009MaleDrug and device company payments (2025): $45Cicily Vachaparambil, MD
✓ Accepts Medicare assignmentGraduated 2017 · Drake University College of MedicineFemaleJennifer L. Vincent, DO
✓ Accepts Medicare assignment✓ TelehealthGraduated 2003FemaleDrug and device company payments (2025): $170
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 Waco
- Primary care doctors198
- Nurse practitioners228
- Cardiologists36
- Dermatologists34
- Orthopedic surgeons16
- Neurologists70
- Ophthalmologists14
- Optometrists15
- Podiatrists9
- Urologists8
- Pulmonologists16
- Nephrologists6
- Endocrinologists4
- ENT doctors4
- Oncologists11
- Psychiatrists43
- Psychologists17
- Therapists and counselors81
- Physical therapists32
- Occupational therapists4
- Speech therapists5
- Audiologists6
- Chiropractors16
- Gynecologists27
- General surgeons16
- Vascular surgeons3
- Pain management doctors4
- Physiatrists9
- Allergists5
- Dietitians3
- Neurosurgeons10
- Infectious disease doctors8
Other care in Waco
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).