Physician

William Frederick Dresen, M.D.

According to 2025 Medicare claims, William Dresen, M.D. (NPI: 1205152469) practices cardiac electrophysiology in the Billings, MT market, with the plurality of this provider's patient population coming from Yellowstone, MT. This provider's primary affiliated billing organization is BILLINGS CLINIC (NPI: 1376598714; TIN: 810231784) and primary practice location at 59101-0703. Dresen is affiliated with the Billings Clinic (ACO ID: A1652), Caravan Collaborative Pathways (ACO ID: A4604), Caravan Health ACO 43 LLC (ACO ID: A4974), Collaborative ACO 30, LLC (ACO ID: A5483), and CoreHealth Alliance LLC (ACO ID: A5645), participating under the MSSP model.

Dresen's data goes back to 2015 and runs through 2024. For example, in 2024, this provider had 2,655 traditional Medicare patients, billed 5,962 HCPCS/CPT codes, and received $306,432 in Medicare payments. The top billing code was 99214 (Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more). Part D data shows 1,328 prescription claims across 325 beneficiaries totaling $434,930 in drug costs, led by Eliquis (Apixaban). Open Payments data shows 40 records totaling $981. You can download detailed data with all billing codes (2015-2024). For more recent data, please contact us.

Over the past 10 years, this provider's Medicare Part B carrier billing did not follow a clear longitudinal pattern. Concurrently, Part D prescription costs have risen steadily, from $15,006 to $434,930. For DME billing, this provider has fewer than 5 years of reported data, so a reliable trend cannot be assigned.