Dr. Guillermo Lazo-Diaz, MD
What this data tells you about Dr. Lazo-Diaz
Dr. Guillermo Lazo-Diaz is a medical oncology in McAllen, TX, with 19 years in practice. Based on federal Medicare data, Dr. Lazo-Diaz performed 18,252 Medicare services across 1,930 unique beneficiaries.
Between the years covered by Open Payments, Dr. Lazo-Diaz received a total of $44,350 from 35 pharmaceutical and/or device companies across 121 individual payments. These payments are legal, publicly disclosed under the federal Sunshine Act, and common in medical oncology. The majority of payments are for consulting, which typically reflects recognized clinical expertise sought by manufacturers. Patients may wish to discuss these relationships with their provider.
The Data Coverage level for Dr. Lazo-Diaz is Very High — reflecting how much public federal data is available about this provider. This is not a quality rating. Patients are encouraged to use this data as one of several factors when choosing a healthcare provider.
Medicare Practice Summary
Medicare Utilization ↗Top procedures by volume
Ranked by number of services performed for Medicare patients. Avg. submitted charge is what the provider billed; avg. Medicare payment is what CMS paid.
| Procedure | Volume | Avg. paid | Avg. submitted |
|---|---|---|---|
| Iron infusion (Feraheme) | 10,200 | $0 | $5 |
| Contrast dye for imaging (iodine-based) | 1,940 | $0 | $3 |
| Blood draw (venipuncture) | 888 | $8 | $20 |
| Complete blood count (CBC) with differential | 843 | $8 | $36 |
| Comprehensive metabolic blood panel | 808 | $10 | $64 |
| Lactate dehydrogenase (enzyme) level | 777 | $6 | $31 |
| Epoetin alfa injection (Retacrit) for anemia | 762 | $5 | $28 |
| Office visit, established patient (30-39 min) | 464 | $91 | $368 |
| Ferritin level test (iron stores) | 280 | $13 | $60 |
| Iron level test | 280 | $6 | $27 |
| Iron binding capacity test | 280 | $9 | $35 |
| Drug injection, under skin or into muscle | 74 | $10 | $96 |
| Reticulated (young) platelet measurement | 63 | $35 | $143 |
| Administration of non-hormonal anti-neoplastic chemotherapy under skin or into muscle | 53 | $55 | $211 |
| Infusion into a vein for therapy, prevention, or diagnosis, 1 hour or less | 51 | $44 | $313 |
| Irrigation of implanted venous access drug delivery device | 51 | $17 | $114 |
| Injection of additional new drug or substance into vein | 44 | $12 | $108 |
| Administration of hormonal anti-neoplastic chemotherapy under skin or into muscle | 44 | $24 | $145 |
| New patient office visit, complex (60-74 min) | 44 | $139 | $709 |
| Administration of chemotherapy into vein, 1 hour or less | 42 | $98 | $707 |
| Office visit, established patient (20-29 min) | 36 | $59 | $250 |
| Red blood count automated, with additional calculations | 35 | $5 | $26 |
| Microscopic examination for white blood cells with manual cell count | 32 | $4 | $22 |
| Complete blood count (CBC), automated | 32 | $6 | $34 |
| Ct scan of chest with contrast | 19 | $49 | $821 |
| Urinalysis with microscopic exam | 19 | $3 | $28 |
| Stool analysis for blood to screen for colon tumors | 18 | $4 | $24 |
| CT scan of chest, without contrast | 16 | $41 | $686 |
| CT scan of abdomen and pelvis with contrast | 15 | $168 | $1,067 |
| Fluorodeoxyglucose f-18 fdg, diagnostic, per study dose, up to 45 millicuries | 15 | $91 | $657 |
| Nuclear medicine study from skull base to mid-thigh with ct scan | 14 | $1,109 | $4,802 |
| Prothrombin time test (blood clotting) | 13 | $4 | $30 |
Industry Payment Transparency
Open Payments through 2024 ↗Payment profile
Industry payments classified by relationship type. Not all payments are equal — research and consulting reflect different relationships than speaking programs or meals.
Payment trend by year
Annual totals from pharmaceutical and medical device companies.
Payments by company (2024)
Associated products mentioned in payments ›
The majority of payments (69%) are consulting fees, which typically reflect recognized clinical expertise sought by manufacturers.
Geographic Context
0.0 mi
Data Sources
| Provider Registry | ✓ NPPES | Weekly updates |
| Medicare Enrollment | ✓ PECOS | Monthly updates |
| Practice Data | ✓ Medicare Util. | Annual (CY lag) |
| Industry Payments | ✓ Open Payments | CY 2024 |
| Disciplinary History | — Not public | N/A |
This provider has data in 4 of 4 available federal datasets, with a Data Coverage level of Very High. This measures how much public data is available about a provider — not how good they are. How we calculate this →
Summary
Dr. Lazo-Diaz is a mixed practice specialist, with moderate Medicare volume, and consulting-driven industry engagement, with 19 years of practice experience.
This summary is auto-generated from federal data. It describes data availability and patterns — not clinical quality. Read our methodology →
Frequently Asked Questions
Is Dr. Lazo-Diaz experienced with iron infusion (feraheme)?
Does Dr. Lazo-Diaz receive payments from pharmaceutical companies?
How do Dr. Lazo-Diaz's costs compare to other medical oncologys in McAllen?
What does Data Coverage mean?
Is this data up to date?
Explore related providers
All data on this page is sourced verbatim from public federal records published by the U.S. Centers for Medicare & Medicaid Services (CMS): NPPES ↗, Open Payments ↗, Medicare Provider Utilization ↗, and PECOS. Publication is mandated by the Physician Payments Sunshine Act (§6002 ACA, 42 U.S.C. §1320a-7h) and the Freedom of Information Act.
This page is not medical advice, an endorsement, a recommendation, or a quality rating. The Transparency Score measures data completeness — how much federal information exists for this provider — not clinical performance, patient outcomes, or quality of care. Always verify information directly with the provider and consult a licensed clinician before making medical decisions.
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