Physician

Guillermo Lazo-Diaz, MD

According to 2025 Medicare claims, Guillermo Lazo-Diaz, MD (NPI: 1760421101) practices medical oncology in the McAllen-Edinburg-Mission, TX market, with the plurality of this provider's patient population coming from Hidalgo, TX. This provider's primary affiliated billing organization is TEXAS ONCOLOGY PA (NPI: 1811944101; TIN: 752131429) and primary practice location at 78503-1271.

Lazo-Diaz's data goes back to 2015 and runs through 2024. For example, in 2024, this provider had 352 traditional Medicare patients, billed 51,727 HCPCS/CPT codes, and received $618,390 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 1,270 prescription claims across 276 beneficiaries totaling $4,640,897 in drug costs, led by Revlimid (Lenalidomide). 2020 DME data shows 11 claims. Open Payments data shows 50 records totaling $30,934. 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 up and down with repeated peaks and valleys, starting at $1,110,578 and ending at $618,390. Concurrently, Part D prescription costs have moved from a lower plateau to a higher plateau, from $777,782 to $4,640,897. In contrast, DME billing represents a smaller volume and started with an early spike, then settled into a lower baseline, moving from $7,724 to $0.