Physician

Fred John Vonstieff, M.D.

According to 2025 Medicare claims, Fred Vonstieff, M.D. (NPI: 1790849685) practices addiction medicine in the Oakland-Fremont-Berkeley, CA market, with the plurality of this provider's patient population coming from Contra Costa, CA. This provider's primary affiliated billing organization is FRED J VON STIEFF MD A PROFESSIONAL CORPORATION (NPI: 1568769412; TIN: 942689195) and primary practice location at 94520-1906. Vonstieff is affiliated with the Aledade 147 Hill Physicians MSSP Basic E (ACO ID: A5230), participating under the MSSP model.

Vonstieff's data goes back to 2015 and runs through 2024. For example, in 2024, this provider had 66 traditional Medicare patients, billed 397 HCPCS/CPT codes, and received $36,481 in Medicare payments. The top billing code was 99223 (Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes). Part D data shows 858 prescription claims across 138 beneficiaries totaling $62,123 in drug costs, led by Naltrexone Hcl (Naltrexone Hcl). 2021 DME data shows 15 claims. Open Payments data shows 1 records totaling $27. 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 has moved from a higher plateau to a lower plateau, from $109,592 to $36,481. Concurrently, Part D prescription costs have moved up and down with repeated peaks and valleys, starting at $238,014 and ending at $62,123. In contrast, DME billing represents a smaller volume and declined steadily, from $2,765 to $122.