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Gastroenterologists who accept Medicare in Frederick, MD
CMS lists 27 clinicians in this specialty with a practice address in Frederick. Accept Medicare assignment (the Medicare-approved amount as full payment): 25. Offer telehealth: 8.
Typical amounts Medicare approves in ZIP 21704 (2024 Medicare rates, the latest CMS has published): a new-patient visit $133, of which you pay about $33; a follow-up visit $102, of which you pay about $26 — 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.
Hemant Chatrath, MD
✓ Accepts Medicare assignmentMIPS score (2024): 95.3/100Graduated 2002MaleLeonard E. Kane, MD
✓ Accepts Medicare assignmentMIPS score (2024): 93.9/100Graduated 1996 · Rutgers R W Johnson Medical School (cam/new Bruns/pisc)MaleOther offices in Frederick: 1Drug and device company payments (2025): $2,112Moustafa S. Ahmed, MD
✓ Accepts Medicare assignmentMIPS score (2024): 90.4/100Graduated 2001 · George Washington University School of MedicineMaleDrug and device company payments (2025): $892Nii L. Lamptey Mills, MD
✓ Accepts Medicare assignmentMIPS score (2024): 83.1/100Graduated 1988MaleDrug and device company payments (2025): $102Sanmeet Singh, MD
✓ Accepts Medicare assignmentMIPS score (2024): 83.1/100✓ TelehealthGraduated 2016 · Howard University College of MedicineMaleDrug and device company payments (2025): $3,546Ruhail Kohli, MD
✓ Accepts Medicare assignmentMIPS score (2024): 83/100✓ TelehealthGraduated 2012MaleDavid W. Kossoff, MD
✓ Accepts Medicare assignmentMIPS score (2024): 79.3/100Graduated 1992 · University of Maryland School of MedicineMaleDrug and device company payments (2025): $388Arash Zarrin, DO
✓ Accepts Medicare assignmentMIPS score (2024): 79.3/100✓ TelehealthGraduated 2018 · Nova Southeastern College of Osteo MedicineMaleDrug and device company payments (2025): $748Tuanh Tonnu
✓ Accepts Medicare assignmentMIPS score (2024): 71.6/100✓ TelehealthGraduated 1990 · University of Maryland School of MedicineFemaleDrug and device company payments (2025): $537Nelson T. Chuang, MD
✓ Accepts Medicare assignmentMIPS score (2024): 67.3/100Graduated 2011 · Rutgers R W Johnson Medical School (cam/new Bruns/pisc)MaleDrug and device company payments (2025): $2,662Shien Hu, MD
✓ Accepts Medicare assignmentMIPS score (2024): 67.3/100Graduated 2017 · University of Maryland School of MedicineMaleDrug and device company payments (2025): $1,910Ali J. Husain, MD
✓ Accepts Medicare assignmentMIPS score (2024): 67.3/100Graduated 2000 · Washington University School of MedicineMaleDrug and device company payments (2025): $1,438Natasha Kamal, MD
✓ Accepts Medicare assignmentMIPS score (2024): 67.3/100Graduated 2012 · University of Maryland School of MedicineFemaleDrug and device company payments (2025): $6,249Andrew D. Mowery, DO
✓ Accepts Medicare assignmentMIPS score (2024): 67.3/100Graduated 2007 · Philadelphia College of Osteopathic MedicineMaleDrug and device company payments (2025): $1,944Eiman H. Nabi, MD
✓ Accepts Medicare assignmentMIPS score (2024): 67.3/100Graduated 2011FemaleDrug and device company payments (2025): $2,271Weiming R. Yan, MD
✓ Accepts Medicare assignmentMIPS score (2024): 67.3/100Graduated 2008 · Ohio State University College of MedicineMaleDrug and device company payments (2025): $1,611Dawei Yang, MD
✓ Accepts Medicare assignmentMIPS score (2024): 67.3/100Graduated 2000MaleDrug and device company payments (2025): $8,288Matthew T. Yeatman, MD
✓ Accepts Medicare assignmentMIPS score (2024): 67.3/100Graduated 1997 · University of Maryland School of MedicineMaleDrug and device company payments (2025): $1,265Faisal M. Bhinder, MD
✓ Accepts Medicare assignmentGraduated 1998MaleDrug and device company payments (2025): $1,324Pilin D. Francis, DO
✓ Accepts Medicare assignment✓ TelehealthGraduated 2018 · Edward Via Col of Osteo Medicine-Virginia CampusFemaleDrug and device company payments (2025): $1,243Mark Gloger, MD
✓ Accepts Medicare assignment✓ TelehealthGraduated 1983 · Georgetown University School of MedicineMaleDrug and device company payments (2025): $725Reza Hashemipour, MD
✓ Accepts Medicare assignmentGraduated 2016 · Howard University College of MedicineMaleDrug and device company payments (2025): $1,432Jessica J. Rosenberg, MD
✓ Accepts Medicare assignmentGraduated 2017 · Pennsylvania State University College of MedicineFemaleOther offices in Frederick: 1Drug and device company payments (2025): $1,470Anna Strongin, MD
✓ Accepts Medicare assignment✓ TelehealthGraduated 2011 · University of Maryland School of MedicineFemaleDrug and device company payments (2025): $1,494Melik Tiba, MD
✓ Accepts Medicare assignmentGraduated 2002MaleDavid F. Hutcheon, MD
May accept assignmentMIPS score (2024): 83.1/100Graduated 1973 · Columbia University College of Physicians and SurgeonsMaleDrug and device company payments (2025): $431David M. Cromwell, MD
May accept assignment✓ TelehealthGraduated 1989 · Yale University School of MedicineMaleDrug and device company payments (2025): $50
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 Frederick
- Primary care doctors232
- Geriatricians3
- Nurse practitioners391
- Cardiologists53
- Dermatologists17
- Orthopedic surgeons102
- Neurologists30
- Ophthalmologists26
- Optometrists26
- Podiatrists33
- Urologists7
- Pulmonologists10
- Nephrologists3
- Endocrinologists8
- Rheumatologists19
- ENT doctors8
- Oncologists10
- Psychiatrists18
- Psychologists27
- Therapists and counselors162
- Physical therapists193
- Occupational therapists15
- Audiologists8
- Chiropractors25
- Gynecologists74
- General surgeons16
- Vascular surgeons9
- Pain management doctors4
- Physiatrists11
- Allergists8
- Dietitians5
- Neurosurgeons11
- Infectious disease doctors4
Other care in Frederick
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).