Physician

William Karl Andersen, MD

According to 2025 Medicare claims, William Andersen, MD (NPI: 1538135900) practices dermatology in the Lancaster, PA market, with the plurality of this provider's patient population coming from Lancaster, PA. This provider's primary affiliated billing organization is LANCASTER SKIN CENTER PC (NPI: 1093781783; TIN: 232913761) and primary practice location at 17601-4132. Andersen is affiliated with the Lancaster General Health Community Care Collaborative, LLC (ACO ID: A2019), participating under the MSSP model.

Andersen's data goes back to 2015 and runs through 2024. For example, in 2024, this provider had 1,568 traditional Medicare patients, billed 5,618 HCPCS/CPT codes, and received $395,310 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 685 prescription claims across 342 beneficiaries totaling $322,405 in drug costs, led by Otezla (Apremilast). Open Payments data shows 2 records totaling $116. 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 $460,215 to $395,310. Concurrently, Part D prescription costs have moved up and down with repeated peaks and valleys, starting at $221,601 and ending at $322,405. For DME billing, this provider has fewer than 5 years of reported data, so a reliable trend cannot be assigned.