Physician

Iain Jacob Macewan, M.D.

According to 2025 Medicare claims, Iain Macewan, M.D. (NPI: 1326300401) practices radiation oncology in the San Diego-Chula Vista-Carlsbad, CA market, with the plurality of this provider's patient population coming from San Diego, CA. This provider's primary affiliated billing organization is PROTON DOCTORS PROFESSIONAL CORPORATION (NPI: 1093240285; TIN: 814484151) and primary practice location at 92121-3101.

Macewan's data goes back to 2015 and runs through 2024. For example, in 2024, this provider had 342 traditional Medicare patients, billed 5,030 HCPCS/CPT codes, and received $2,077,909 in Medicare payments. The top billing code was 77525 (Complex proton beam radiation treatment). Part D data shows 72 prescription claims across 34 beneficiaries totaling $3,142 in drug costs, led by Tamsulosin Hcl (Tamsulosin Hcl). Open Payments data shows 2 records totaling $44. 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 risen steadily, from $169,103 to $2,077,909. Similarly, Part D prescription costs have moved sharply higher in recent years, from $654 to $3,142. For DME billing, this provider has fewer than 5 years of reported data, so a reliable trend cannot be assigned.