Expertise in
5
conditions

Dr. Guillermo Lazo

Hematology | Oncology
Texas Oncology Pharmacy-McAllen
1901 S Col Rowe Blvd, 
Mcallen, TX 
Accepting New Patients
Offers Telehealth
Expertise in
5
conditions
Texas Oncology Pharmacy-McAllen
1901 S Col Rowe Blvd, 
Mcallen, TX 

Overview

Guillermo Lazo is a Hematologist and an Oncologist practicing medicine in Mcallen, Texas.

Dr. Lazo is highly rated in 5 conditions, according to our data. His clinical expertise encompasses Familial Colorectal Cancer, Thrombocytopenia, Hemangioma Thrombocytopenia Syndrome, and Paget Disease of the Breast.

He is actively involved in clinical research, participating in 2 clinical trials. Dr. Lazo is currently accepting new patients.

Specialties

Hematology
Oncology

Licenses

Internal Medicine in TX

Hospital Affiliations

South Texas Health System
Rio Grande Regional Hospital
Doctors Hosptal At Renaissance

Languages Spoken

English

Gender

Male

Insurance

Accepted insurance can change. Please verify directly with the provider.

Find your insurance
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Accepted insurance plans:

Aetna
  • EPO
  • HMO
  • POS
  • PPO
Anthem BCBS
  • EPO
  • HMO
  • POS
  • PPO
Blue Cross Blue Shield
  • EPO
  • HMO
  • POS
  • PPO
Cigna
  • EPO
  • HMO
  • PPO
Friday Health

Accepted plan types not found. Please verify directly with the provider.

Health Care Services Corporation
  • HMO
  • INSURANCE PLAN
  • MANAGED MEDICAID PLAN
  • MEDICARE MAPD
  • MEDICARE PDP
  • MEDICARE SNP
  • OTHER COMMERCIAL
  • OTHER MEDICARE
  • OTHER MEDICARE PART D
  • PPO
Highmark
  • EPO
  • HMO
  • PPO
Humana
  • HMO
  • INDEMNITY
  • POS
  • PPO
Managed Medicaid
  • OTHER MANAGED MEDICAID
Medicaid
  • OTHER MEDICAID
  • STATE MEDICAID
Medicare
  • INSURANCE PLAN
  • MANAGED MEDICAID PLAN
  • MEDICARE MAPD
  • MEDICARE PDP
  • MEDICARE SNP
  • MEDICARE-MEDICAID PLAN
  • OTHER MEDICARE PART D
Oscar
  • EPO
  • HMO
  • PPO
Superior Health Plan
  • MANAGED MEDICAID PLAN
  • MEDICARE-MEDICAID PLAN
  • OTHER COMMERCIAL
UnitedHealthcare
  • EPO
  • HMO
  • POS
  • PPO
Wellcare
  • EPO
  • HMO
  • INSURANCE PLAN
  • MANAGED MEDICAID PLAN
  • MEDICARE MAPD
  • MEDICARE PDP
  • MEDICARE SNP
  • MEDICARE-MEDICAID PLAN
  • OTHER MEDICARE
  • OTHER MEDICARE PART D
View 10 Less Insurance Carriers -

Locations

Texas Oncology Pharmacy-McAllen
1901 S Col Rowe Blvd, Mcallen, TX 78503
Other Locations
Texas Oncology Pharmacy-Harlingen
2121 Pease St Ste 101, Harlingen, TX 78550
Texas Oncology Mcallen
1901 S Col Rowe Blvd, Mcallen, TX 78503

Additional Areas of Focus

Dr. Lazo has provided the following conditions as areas of focus. Please note that we may not have enough data to validate their experience in some of these conditions.

Metastatic Uveal Melanoma

Clinical Research

Clinical research consists of overseeing clinical studies of patients undergoing new treatments and therapies, and publishing articles in peer reviewed medical journals. Providers who actively participate in clinical research are generally at the forefront of the fields and aware of the most up-to-date advances in treatments for their patients.

2 Clinical Trials

A Phase 3 Open-Label, Randomized Study of LOXO-305 Versus Investigator Choice of BTK Inhibitor in Patients With Previously Treated BTK Inhibitor Naïve Mantle Cell Lymphoma (BRUIN MCL-321)
A Phase 3 Open-Label, Randomized Study of LOXO-305 Versus Investigator Choice of BTK Inhibitor in Patients With Previously Treated BTK Inhibitor Naïve Mantle Cell Lymphoma (BRUIN MCL-321)
Enrollment Status: Active_not_recruiting
Publish Date: May 15, 2026
Intervention Type: Drug
Study Drugs: LOXO-305, Ibrutinib, Acalabrutinib, Zanubrutinib
Study Phase: Phase 3
A Phase 3 Open-Label, Randomized Study of LOXO-305 Versus Investigator's Choice of Idelalisib Plus Rituximab or Bendamustine Plus Rituximab in BTK Inhibitor Pretreated Chronic Lymphocytic Leukemia/Small Lymphocytic Lymphoma (BRUIN CLL-321)
A Phase 3 Open-Label, Randomized Study of LOXO-305 Versus Investigator's Choice of Idelalisib Plus Rituximab or Bendamustine Plus Rituximab in BTK Inhibitor Pretreated Chronic Lymphocytic Leukemia/Small Lymphocytic Lymphoma (BRUIN CLL-321)
Enrollment Status: Active_not_recruiting
Publish Date: April 24, 2026
Intervention Type: Drug
Study Drugs: Pirtobrutinib, Idelalisib, Bendamustine, Rituximab
Study Phase: Phase 3
View 1 Less Clinical Trial
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Frequently Asked Questions about Dr. Guillermo Lazo

How do I make an appointment with Dr. Guillermo Lazo?

You can book an appointment with Dr. Guillermo Lazo by calling their office at 956-687-5150. MediFind provides direct contact information so you can schedule visits, second opinions, or consultations without navigating third-party calendars.

Is Dr. Guillermo Lazo a top-rated expert for Familial Colorectal Cancer?

MediFind is an objective health platform that identifies experts based on real-world data. Dr. Guillermo Lazo is classified as an Advanced expert for Familial Colorectal Cancer, meaning they are among the top experts in the country for this condition. This ranking is based on their volume of patients, published research, and peer connections.

What conditions does Dr. Guillermo Lazo specialize in?

While Dr. Guillermo Lazo is a Hematology, they have specific expertise in Familial Colorectal Cancer, Thrombocytopenia, and Hemangioma Thrombocytopenia Syndrome. MediFind analyzes a doctor's articles and referral patterns to identify their specific areas of focus within Hematology.

Does Dr. Guillermo Lazo accept my insurance?

Dr. Guillermo Lazo accepts most major insurance plans, including Aetna and Anthem BCBS. We recommend calling the office directly at 956-687-5150 to verify that your specific plan is currently accepted before your visit.

Areas of Expertise

MediFind evaluates expertise by pulling from factors such as number of articles a doctor has published in medical journals, participation in clinical trials, speaking at industry conferences, prescribing and referral patterns, and strength of connections with other experts in their field.

Learn more about MediFind’s expert tiers

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