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Primary care doctors who accept Medicare in Knoxville, IA
CMS lists 19 clinicians in this specialty with a practice address in Knoxville. Accept Medicare assignment (the Medicare-approved amount as full payment): 18. Offer telehealth: 1.
Typical amounts Medicare approves in ZIP 50138 (2024 Medicare rates, the latest CMS has published): a new-patient visit $122, of which you pay about $31; a follow-up visit $94, 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.
Katherine A. Dvorak, DO
✓ Accepts Medicare assignmentMIPS score (2024): 93.8/100Graduated 2020FemaleOther offices in Knoxville: 1Thomas B. Hoehns, MD
✓ Accepts Medicare assignmentMIPS score (2024): 93.8/100Graduated 1992 · University of Iowa, RJ & L Carver College of MedicineMaleOther offices in Knoxville: 1Cynthia A. Hoque, DO
✓ Accepts Medicare assignmentMIPS score (2024): 93.8/100Graduated 2014FemaleOther offices in Knoxville: 1Drug and device company payments (2025): $34Bhama Jayaveerpandian, MD
✓ Accepts Medicare assignmentMIPS score (2024): 93.8/100Graduated 1999FemaleOther offices in Knoxville: 1Drug and device company payments (2025): $34Samantha D. Keady, DO
✓ Accepts Medicare assignmentMIPS score (2024): 93.8/100Graduated 2016FemaleRyan E. Laughlin, DO
✓ Accepts Medicare assignmentMIPS score (2024): 93.8/100Graduated 2014 · Des Moines University of Osteopathic Medicine and Health SciencesMaleOther offices in Knoxville: 1Drug and device company payments (2025): $34James B. Law, DO
✓ Accepts Medicare assignmentMIPS score (2024): 93.8/100Graduated 2014 · University of Iowa, RJ & L Carver College of MedicineMaleDrug and device company payments (2025): $34Shannon M. Remington, PA
✓ Accepts Medicare assignmentMIPS score (2024): 93.8/100Graduated 2007FemaleOther offices in Knoxville: 1Drug and device company payments (2025): $99Jared L. Rietveld, DO
✓ Accepts Medicare assignmentMIPS score (2024): 93.8/100Graduated 2018MaleDrug and device company payments (2025): $34Kevin W. Mace, DO
✓ Accepts Medicare assignmentMIPS score (2024): 91.8/100Graduated 2001 · At Still University of Health Sciences, College of Osteo Med, KirksvilleMaleDrug and device company payments (2025): $19Gabriel Conley, MD
✓ Accepts Medicare assignmentGraduated 2022MaleFrank J. Filippelli, DO
✓ Accepts Medicare assignment✓ TelehealthGraduated 1999MaleDrug and device company payments (2025): $133Dylan J. Lowe, DO
✓ Accepts Medicare assignmentGraduated 2017MaleDrug and device company payments (2025): $26,070Timothy C. McCoy, DO
✓ Accepts Medicare assignmentGraduated 1996MaleOther offices in Knoxville: 1Drug and device company payments (2025): $223Patrick Oben, MD
✓ Accepts Medicare assignmentGraduated 2007MaleNaveen Penmasta, MD
✓ Accepts Medicare assignmentGraduated 2012MaleErica L. Silbernagel, DO
✓ Accepts Medicare assignmentGraduated 2015FemaleDrug and device company payments (2025): $121Ruffin Tchakounte, DO
✓ Accepts Medicare assignmentGraduated 2022 · Des Moines University of Osteopathic Medicine and Health SciencesMaleDrug and device company payments (2025): $284Zachery C. Mahler, MD
May accept assignmentGraduated 2019MaleDrug and device company payments (2025): $128
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.
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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).