Cardiothoracic Surgeons in Montana
Data updated monthly · Last refresh October 2026
24 Thoracic Surgery (Cardiothoracic Vascular Surgery) providers practice in Montana, including 5 (21%) offering telehealth. The largest concentration is in Missoula. Profiles include federal Open Payments records of money received from drug and device companies in 2025. Listings are drawn from federal public records and are not endorsements.
24providers
5telehealth
Missoulatop city
Thoracic Surgery (Cardiothoracic Vascular Surgery) by city in Montana
Choose a city to see providers there.
Where Cardiothoracic Surgeons in Montana practice
From CMS Medicare enrollment records covering 12 of the 24 providers listed here (50%). Providers who do not bill Medicare are not included in these figures.
0%solo or small practice (under 10 clinicians)
0%mid-size group (10 to 99)
100%large group or health system (100+)
Largest practice groups
| Group (as registered with Medicare) | Cardiothoracic Surgeons | All clinicians in group | Main city |
| Providence Health and Services Mt | 4 | 358 | Missoula |
| Billings Clinic | 2 | 814 | Billings |
| Kalispell Regional Medical Center Inc. | 2 | 422 | Kalispell |
| Benefis Hospitals Inc. | 2 | 390 | Great Falls |
Hospitals where they hold privileges
| Hospital | City | Ownership | CMS star rating | Cardiothoracic Surgeons affiliated |
| Bozeman Health Deaconess Hospital | Bozeman | Nonprofit | 4 of 5 | 5 |
| St. Patrick Hospital | Missoula | Nonprofit | 5 of 5 | 5 |
| St Peters Health | Helena | Nonprofit | 3 of 5 | 4 |
| St James Hospital | Butte | Nonprofit | 2 of 5 | 3 |
| Benefis Hospitals Inc. | Great Falls | Nonprofit | 2 of 5 | 3 |
Sources: CMS Doctors and Clinicians (August 2026) and Facility Affiliation files (August 2026); hospital ownership type and overall star rating from CMS Hospital General Information (July 2026). A clinician in several groups is counted once, in the largest group they bill through. Ownership type is what the hospital reports to CMS; it does not show private equity or other investor ownership. How we build this directory.
Thoracic Surgery (Cardiothoracic Vascular Surgery) providers in Montana
Listed by city, largest first. 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. Alexander Kraev, M.D.Billings, MT · $493 in drug and device payments (2025) · Telehealth ·
(406) 238-2500 Dr. Anne Cahill, M.D.Billings, MT · $788 in drug and device payments (2025) ·
(406) 238-6820 Dr. Constance Haan, M.D.Billings, MT · No drug or device payments recorded (2025) ·
(406) 281-5344 Dr. Eric Howell, MDBillings, MT · No drug or device payments recorded (2025) · Telehealth ·
(406) 238-2500 Dr. Hewes Agnew, MDBillings, MT · No drug or device payments recorded (2025) ·
(406) 238-2500 Dr. James Morris, M.D.Billings, MT · No drug or device payments recorded (2025) ·
(406) 238-6820 Dr. Michael Maxwell, M.D.Bozeman, MT · $1,293 in drug and device payments (2025) ·
(406) 414-5000 Dr. Paul Myerowitz, M.D.Columbia Falls, MT · No drug or device payments recorded (2025) ·
(406) 387-4440 Dr. Alfredo Ramirez, M.D.Great Falls, MT · $1,122 in drug and device payments (2025) ·
(406) 455-4320 Dr. Brett Williams, MDGreat Falls, MT · No drug or device payments recorded (2025) ·
(406) 761-6500 Dr. Dimitrios Koudoumas, M.D., PH.DGreat Falls, MT · $3,098 in drug and device payments (2025) ·
(406) 731-8888 Dr. Osama Ben Hameid, MDGreat Falls, MT · No drug or device payments recorded (2025) ·
(604) 365-4723 Dr. Roberto Amado-cattaneo, MDGreat Falls, MT · No drug or device payments recorded (2025) ·
(406) 731-8888 Dr. Drew Kirshner, M.D.Kalispell, MT · $93 in drug and device payments (2025) ·
(406) 257-8992 Dr. J Maxwell, MDKalispell, MT · $94 in drug and device payments (2025) ·
(406) 257-8993 Dr. Roch Boyer, M.D.Kalispell, MT · No drug or device payments recorded (2025) ·
(406) 752-5000 Dr. Walter Graves, M.D.Kalispell, MT · No drug or device payments recorded (2025) ·
(406) 257-8992 Dr. Anthony Caffarelli, M.D.Missoula, MT · $3,323 in drug and device payments (2025) · Telehealth ·
(406) 329-5615 Dr. Joseph Schmoker, MDMissoula, MT · No drug or device payments recorded (2025) ·
(406) 329-5615 Dr. Matthew Fleming, PA-CMissoula, MT · $1,761 in drug and device payments (2025) ·
(406) 329-5615 Dr. Stephen Hiro, MDMissoula, MT · No drug or device payments recorded (2025) ·
(406) 329-5615 Dr. Stephen Tahta, MDMissoula, MT · No drug or device payments recorded (2025) ·
(406) 329-5615 Dr. Stewart Long, MDMissoula, MT · $3,876 in drug and device payments (2025) · Telehealth ·
(406) 329-5612 Dr. Travis Abicht, MDMissoula, MT · $581 in drug and device payments (2025) · Telehealth ·
(406) 329-5615 Common questions
How many Thoracic Surgery (Cardiothoracic Vascular Surgery) providers are in Montana?There are 24 Thoracic Surgery (Cardiothoracic Vascular Surgery) providers with active NPI records practicing in Montana, according to federal NPPES data refreshed monthly.
Do Thoracic Surgery (Cardiothoracic Vascular Surgery) providers in Montana offer telehealth?Yes. 5 of the 24 Thoracic Surgery (Cardiothoracic Vascular Surgery) providers in Montana (about 21%) report offering telehealth services in CMS data.
Which cities in Montana have the most Thoracic Surgery (Cardiothoracic Vascular Surgery) providers?Missoula (7), Billings (6), Great Falls (5) have the highest concentration of Thoracic Surgery (Cardiothoracic Vascular Surgery) providers in Montana.
Where does this data come from?Provider counts and profiles 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.
Do most Cardiothoracic Surgeons in Montana work in independent practices or large health systems?Among 12 Cardiothoracic Surgeons in Montana enrolled in Medicare, 0% bill through a solo or small practice with fewer than 10 clinicians, 0% through a mid-size group of 10 to 99, and 100% through a large group or health system with 100 or more clinicians, according to CMS enrollment records.
Which hospitals do Cardiothoracic Surgeons in Montana work at?According to CMS facility affiliation records, the Montana hospitals where the most Cardiothoracic Surgeons hold privileges are Bozeman Health Deaconess Hospital in Bozeman; St. Patrick Hospital in Missoula; St Peters Health in Helena.
Related reading on HealthcareDiscovery.AI
Thoracic Surgery (Cardiothoracic Vascular Surgery) in all 50 states Search all 24 in the directory Ask Zach for help choosing
Related
