Physician

Alison Grace Chang, MD

According to 2025 Medicare claims, Alison Chang, MD (NPI: 1205253465) practices hematology/oncology in the San Jose-Sunnyvale-Santa Clara, CA market, with the plurality of this provider's patient population coming from Santa Clara, CA. This provider's primary affiliated billing organization is SUTTER BAY MEDICAL FOUNDATION (NPI: 1013950807; TIN: 941156581) and primary practice location at 94301-2302. Chang is affiliated with the Sutter Medicare Direct (ACO ID: A5279), participating under the MSSP model.

Chang's data goes back to 2015 and runs through 2024. For example, in 2024, this provider had 905 traditional Medicare patients, billed 231,918 HCPCS/CPT codes, and received $4,688,333 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 1,633 prescription claims across 392 beneficiaries totaling $4,493,516 in drug costs, led by Lenalidomide (Lenalidomide). DME data shows 99 claims. Open Payments data shows 2 records totaling $262. 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 sharply higher in recent years, from $604,496 to $4,688,333. Similarly, Part D prescription costs have risen steadily, from $58,833 to $4,493,516. For DME billing, this provider has fewer than 5 years of reported data, so a reliable trend cannot be assigned.