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Gastroenterologists who accept Medicare in Acton, MA
CMS lists 7 clinicians in this specialty with a practice address in Acton. Accept Medicare assignment (the Medicare-approved amount as full payment): 7. Offer telehealth: 2.
Typical amounts Medicare approves in ZIP 01720 (2024 Medicare rates, the latest CMS has published): a new-patient visit $144, of which you pay about $36; a follow-up visit $111, 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.
Michael L. Desimone, MD
✓ Accepts Medicare assignmentGraduated 2013MaleDrug and device company payments (2025): $2,006Mark P. Epstein, MD
✓ Accepts Medicare assignmentGraduated 1988MaleDrug and device company payments (2025): $1,959Gail M. Herzig, MD
✓ Accepts Medicare assignment✓ TelehealthGraduated 1988 · Albany Medical College of Union UniversityFemaleDrug and device company payments (2025): $720Benjamin J. Hyatt, MD
✓ Accepts Medicare assignment✓ TelehealthGraduated 2004 · Boston University School of MedicineMaleDrug and device company payments (2025): $68,026Ann Marie Joyce, MD
✓ Accepts Medicare assignmentGraduated 1997FemaleDrug and device company payments (2025): $6,410Peter E. Krims, MD
✓ Accepts Medicare assignmentGraduated 1982 · Boston University School of MedicineMaleDrug and device company payments (2025): $2,283Frank V. Linn, MD
✓ Accepts Medicare assignmentGraduated 1983 · University of Michigan Medical SchoolMaleDrug and device company payments (2025): $2,484
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 Acton
- Primary care doctors20
- Nurse practitioners35
- Optometrists6
- Psychiatrists11
- Psychologists10
- Therapists and counselors49
- Physical therapists61
- Chiropractors6
- Dietitians3
Other care in Acton
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).