Physician

David D. Nelsen, MD

According to 2025 Medicare claims, David Nelsen, MD (NPI: 1417184169) practices dermatology in the Janesville-Beloit, WI market, with the plurality of this provider's patient population coming from Rock, WI. This provider's primary affiliated billing organization is MERCY HEALTH SYSTEM CORPORATION (NPI: 1598718603; TIN: 390816848) and primary practice location at 53546-1626. Nelsen is affiliated with the Mercy Health Corporation (ACO ID: A2097), participating under the MSSP model.

Nelsen's data goes back to 2015 and runs through 2024. For example, in 2024, this provider had 1,695 traditional Medicare patients, billed 4,910 HCPCS/CPT codes, and received $158,548 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 2,148 prescription claims across 717 beneficiaries totaling $1,983,663 in drug costs, led by Humira(Cf) Pen (Adalimumab). Open Payments data shows 266 records totaling $176,860. 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 declined steadily, from $198,846 to $158,548. In contrast, Part D prescription costs have moved from a lower plateau to a higher plateau, from $310,879 to $1,983,663. For DME billing, this provider has fewer than 5 years of reported data, so a reliable trend cannot be assigned.