Anesthesiology in Billings, Montana
Data updated monthly · Last refresh September 2026
67 Anesthesiology providers practice in Billings, and 30% received drug or device company payments in 2025. Listings are drawn from federal public records and are not endorsements.
Anesthesiology providers in Billings
Listed alphabetically. Payment figures come from the federal Open Payments program, which requires drug and device companies to report what they pay physicians for consulting, speaking, meals, travel and royalties. A disclosed payment is a financial relationship, not evidence of wrongdoing, and many totals reflect a single meal. Figures cover calendar year 2025.
Dr. Matthew SherrodBillings, MT · No drug or device payments recorded (2025) ·
(817) 995-6359 Dr. Michael Casimir, MDBillings, MT · No drug or device payments recorded (2025) ·
(631) 379-2104 Dr. Michael Hovland, M.D.Billings, MT · No drug or device payments recorded (2025) ·
(406) 254-0709 Dr. Michael O'neil, M.D.Billings, MT · $144 in drug and device payments (2025) ·
(406) 896-2447 Dr. Michael SchweitzerBillings, MT · No drug or device payments recorded (2025) ·
(406) 254-0707 Dr. Millie Boyd, MDBillings, MT · No drug or device payments recorded (2025) ·
(406) 238-2210 Dr. Nancy Sweeney, M.D.Billings, MT · No drug or device payments recorded (2025) ·
(406) 248-7186 Dr. Patrick Duey, MDBillings, MT · No drug or device payments recorded (2025) ·
(406) 896-2447 Dr. Paula Roos, M.D.Billings, MT · No drug or device payments recorded (2025) ·
(406) 896-2447 Dr. Rodney Lee, M.D.Billings, MT · No drug or device payments recorded (2025) ·
(406) 896-2447 Dr. Shea Snyder, M.D.Billings, MT · No drug or device payments recorded (2025) ·
(406) 254-0707 Dr. Stephen Ball, M.D.Billings, MT · $125 in drug and device payments (2025) ·
(406) 254-0707 Dr. Steven Kriner, D.O.Billings, MT · $51 in drug and device payments (2025) ·
(406) 896-2447 Dr. Teresa Otto, M.D.Billings, MT · No drug or device payments recorded (2025) ·
(406) 896-2447 Dr. Thomas Robinson, MDBillings, MT · No drug or device payments recorded (2025) ·
(406) 254-0707 Dr. Tysen Trujillo, M.D.Billings, MT · $46 in drug and device payments (2025) ·
(406) 254-0704 Dr. Zeferino Arroyo, D.O.Billings, MT · $19 in drug and device payments (2025) ·
(406) 254-0707 Common questions
How many Anesthesiology providers are in Billings, Montana?There are 67 Anesthesiology providers with active NPI records practicing in Billings, according to federal NPPES data refreshed monthly.
How many Anesthesiology providers in Billings received drug or device company payments?20 of 67 (30%) received at least one payment from a drug or device company in 2025, according to the federal Open Payments program.
Where does this data come from?Provider records come from the federal NPPES registry and CMS Doctors and Clinicians files. Payment figures come from the CMS Open Payments program for calendar year 2025. The directory refreshes monthly.
All specialties in Billings Anesthesiology across Montana