Physician

Diane Chang, M.D., PH.D.

According to 2025 Medicare claims, Diane Chang, M.D., PH.D. (NPI: 1588826168) practices ophthalmology in the Lexington Park, MD market, with the plurality of this provider's patient population coming from Calvert, MD. This provider's primary affiliated billing organization is CHESAPEAKE EYE CARE AND LASER CENTER LLC (NPI: 1548296262; TIN: 52-2124249) and primary practice location at 20678-3145.

Chang's data goes back to 2015 and runs through 2024. For example, in 2024, this provider had 1,336 traditional Medicare patients, billed 3,355 HCPCS/CPT codes, and received $263,095 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 788 prescription claims across 209 beneficiaries totaling $170,954 in drug costs, led by Restasis (Cyclosporine). 2022 DME data shows 28 claims. Open Payments data shows 13 records totaling $315. 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 lower plateau to a higher plateau, from $83,775 to $263,095. Similarly, Part D prescription costs have risen steadily, from $97,954 to $170,954. For DME billing, this provider has fewer than 5 years of reported data, so a reliable trend cannot be assigned.