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Gastroenterologists who accept Medicare in Greeley, CO
CMS lists 13 clinicians in this specialty with a practice address in Greeley. Accept Medicare assignment (the Medicare-approved amount as full payment): 13. Offer telehealth: 1.
Typical amounts Medicare approves in ZIP 80631 (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.
Ray L. James, MD
✓ Accepts Medicare assignmentMIPS score (2024): 100/100Graduated 1980 · Johns Hopkins University School of MedicineMaleLouis Aviles, MD
✓ Accepts Medicare assignmentGraduated 1987 · Harvard Medical SchoolMaleChristie J. Blanton, MD
✓ Accepts Medicare assignmentGraduated 2009 · University of South Alabama College of MedicineFemaleDrug and device company payments (2025): $21Matthew Cohen, MD
✓ Accepts Medicare assignmentGraduated 1991 · University of Massachusetts Medical SchoolMaleDrug and device company payments (2025): $21Jasmin D. Deneault, MD
✓ Accepts Medicare assignmentGraduated 1984 · Wayne State University School of MedicineFemaleOther offices in Greeley: 1Paul Deneault, MD
✓ Accepts Medicare assignmentGraduated 1983MaleOther offices in Greeley: 1Drug and device company payments (2025): $2,602Nicole Doria, MD
✓ Accepts Medicare assignmentGraduated 2018 · George Washington University School of MedicineFemaleGretchen Evans, MD
✓ Accepts Medicare assignmentGraduated 2017 · Drexel University College of MedicineFemaleOther offices in Greeley: 1Drug and device company payments (2025): $1,240Scot M. Lewey, DO
✓ Accepts Medicare assignmentGraduated 1984MaleDrug and device company payments (2025): $1,223Scott Mackenzie, MD
✓ Accepts Medicare assignment✓ TelehealthGraduated 2001MaleDrug and device company payments (2025): $2,696Luis S. Nasiff, MD
✓ Accepts Medicare assignmentGraduated 1984MaleDrug and device company payments (2025): $288Veronika Panah, MD
✓ Accepts Medicare assignmentGraduated 2007 · Texas Tech University Health Science Center School of MedicineFemaleKendra T. Stilwell, DO
✓ Accepts Medicare assignmentGraduated 2015 · Philadelphia College of Osteopathic MedicineFemaleDrug and device company payments (2025): $158
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 Greeley
- Primary care doctors174
- Nurse practitioners130
- Cardiologists30
- Dermatologists5
- Orthopedic surgeons36
- Neurologists7
- Ophthalmologists5
- Optometrists21
- Podiatrists6
- Urologists8
- Pulmonologists13
- Endocrinologists4
- Rheumatologists6
- ENT doctors3
- Oncologists8
- Psychiatrists8
- Psychologists8
- Therapists and counselors76
- Physical therapists41
- Occupational therapists13
- Speech therapists5
- Audiologists6
- Chiropractors14
- Gynecologists12
- General surgeons13
- Vascular surgeons5
- Physiatrists4
- Allergists4
- Neurosurgeons6
- Infectious disease doctors8
Other care in Greeley
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).