Physician
Alexander Richard Chang, M.D.
According to 2025 Medicare claims, Alexander Chang, M.D. (NPI: 1407016967) practices nephrology, with the plurality of this provider's patient population coming from Columbia, PA. This provider's primary affiliated billing organization is GEISINGER CLINIC (NPI: 1255382784; TIN: 236291113) and primary practice location at 17822-9800. Chang is affiliated with the Keystone ACO (ACO ID: A1552), participating under the MSSP model.
Chang's data goes back to 2015 and runs through 2024. For example, in 2024, this provider had 138 traditional Medicare patients, billed 292 HCPCS/CPT codes, and received $16,290 in Medicare payments. The top billing code was 99222 (Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes). Part D data shows 1,171 prescription claims across 228 beneficiaries totaling $707,112 in drug costs, led by Jynarque (Tolvaptan). DME data shows 38 claims. Open Payments data shows 19 records totaling $80,203. 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 fallen sharply in recent years, from $92,579 to $16,290. In contrast, Part D prescription costs have risen steadily, from $141,436 to $707,112. For DME billing, this provider has fewer than 5 years of reported data, so a reliable trend cannot be assigned.