DR. GUILLERMO LAZO-DIAZ MD
NPI 1760421101
Internal Medicine - Medical Oncology in Mcallen, TX

Active since June 04, 2006PECOS EnrolledAccepts Medicare Assignment
89.44/100
CMS Quality Rating
1901 S 2ND ST, MCALLEN, TX 78503(956) 687-5150(956) 687-9546 Get Directions Write a Review

NPPES record last updated: December 11, 2008. Verified against the NPPES registry weekly; last sync: August 16, 2026.

About Dr. Guillermo Lazo-diaz Md NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. GUILLERMO LAZO-DIAZ MD (NPI 1760421101) is an individual medical oncology provider in Mcallen, Texas, licensed in Texas (L0370) and active in the NPI registry since June 2006. He is enrolled in Medicare PECOS, is affiliated with South Texas Health System, and is a graduate of Other (1993).

NPPES Registry Identity

NPI1760421101
Entity TypeIndividualMale
Primary Taxonomy207RX0202X
Provider Legal NameDR. GUILLERMO LAZO-DIAZCredential: MD
Location Address1901 S 2ND STMcallen, TX 78503-1271
Mailing AddressPo Box 911230Dallas, TX 75391-1230 · (972) 997-8000 · Fax (972) 437-9605
Fax(956) 687-9546
Sole ProprietorNo
Medical School CMSOtherGraduated 1993
Enumeration DateJune 4, 2006
Last NPPES UpdateDecember 11, 2008
NPI 1760421101 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

Primary SpecialtyInternal Medicine · Medical OncologyAllopathic & Osteopathic Physicians
Taxonomy Code207RX0202X
License Licensed in TX · L0370
Definition
An internist who specializes in the diagnosis and treatment of all types of cancer and other benign and malignant tumors. This specialist decides on and administers therapy for these malignancies as well as consults with surgeons and radiotherapists on other treatments for cancer.
Also ListedInternal Medicine · Hematology & OncologyTaxonomy 207RH0003X · License L0370 (TX)
1901 S 2ND ST, Mcallen, TX 78503

Other Identifiers 7

Medicare PIN8G6415TX
Medicare PIN8D8380TX
Medicaid42067104TX
Medicare PINP00297863TX
Other8S7051TX · Blue Cross Of Tx
Medicare UPINH22275
Medicaid42067103TX

Accepted Insurance

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

Enrolled in Medicare and accepts Medicare assignment

Dr. Guillermo Lazo-diaz Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID4385628601
PECOS Enrollment IDI20040615000932
Eligible to Order & Refer Part B Labs & Imaging Durable Medical Equipment Home Health Agency Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Areas of Expertise CMS Part B claims 32

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Injection, ferumoxytol, for treatment of iron deficiency anemia, 1 mg (non-esrd use) Q0138
Ferumoxytol injection is a treatment for iron deficiency anemia, a condition where your body lacks enough iron. It is injected into your vein to increase iron levels, aiding in the production of healthy red blood cells. This treatment is not for ESRD patients.
7,650 services11 patients
Low osmolar contrast material, 300-399 mg/ml iodine concentration, per ml Q9967
Low osmolar contrast material with 300-399 mg/ml iodine concentration is a diagnostic tool used in imaging procedures. It helps to enhance the visibility of specific areas in the body, aiding in accurate diagnosis. It's safe and generally well-tolerated by patients.
1,785 services22 patients
Injection, ferric derisomaltose, 10 mg J1437
Ferric derisomaltose is an iron replacement product. It's given as an injection to treat iron deficiency anemia, a condition where the body lacks enough iron. The injection helps increase iron in your body to healthy levels.
1,400 services11 patients
Injection, epoetin alfa-epbx, biosimilar, (retacrit) (for non-esrd use), 1000 units Q5106
Epoetin alfa-epbx (Retacrit) is a biosimilar injection used for non-ESRD (End-Stage Renal Disease). It helps your body make more red blood cells, increasing your energy and well-being. It's usually given under the skin or into a vein by a healthcare professional.
1,040 services16 patients
Insertion of needle into vein for collection of blood sample 36415
This procedure involves inserting a small needle into a vein, typically in your arm, to collect a blood sample. It's a quick and simple process to help diagnose or monitor health conditions. You may feel a small prick, but discomfort is minimal.
710 services180 patients
Complete blood cell count (red cells, white blood cell, platelets), automated test and automated differential white blood cell count 85025
A Complete Blood Cell Count is a common test that measures various components of the blood, including red cells (carry oxygen), white cells (fight infection), and platelets (help blood clot). An automated test ensures accuracy. The differential count provides detailed information about white cell types.
689 services184 patients

Hospital Affiliations CMS Care Compare 3

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

South Texas Health System

Acute Care Hospitals · Edinburg, TX
3/5 CMS rating
OwnershipProprietary
CMS Certification Number450119
Location1102 W Trenton RoadEdinburg, TX 78539 · Hidalgo County
Emergency services Birthing friendly

Rio Grande Regional Hospital

Acute Care Hospitals · Mcallen, TX
3/5 CMS rating
OwnershipProprietary
CMS Certification Number450711
Location101 E Ridge RdMcallen, TX 78503 · Hidalgo County
Emergency services Birthing friendly

Doctors Hosptal At Renaissance

Acute Care Hospitals · Edinburg, TX
3/5 CMS rating
OwnershipPhysician
CMS Certification Number450869
Location5501 South MccollEdinburg, TX 78539 · Hidalgo County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 78503 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$166.88 typical visit price
range $54.84 – $166.88
Typical copayment $41.72 (range $13.71 – $41.72)
Most-billed visit code 99205
Established Patient
$97.05 typical visit price
range $17.52 – $136.11
Typical copayment $24.26 (range $4.38 – $34.02)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Medicare Quality Performance CMS QPP · MIPS

Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.

89.44/100
MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program
Scored through an Alternative Payment Model
Quality75.85
Promoting Interoperability100
Improvement Activities40

Other Providers at the Same Location NPPES 10

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

Internal Medicine (Hematology & Oncology)
1901 S 2ND ST
MCALLEN, TX 78503
Internal Medicine (Medical Oncology)
1901 S 2ND ST
MCALLEN, TX 78503
Radiology (Radiation Oncology)
1901 S 2ND ST
MCALLEN, TX 78503
Pharmacy (Specialty Pharmacy)
1901 S 2ND ST
MCALLEN, TX 78503
Internal Medicine (Hematology & Oncology)
1901 S 2ND ST
MCALLEN, TX 78503
Internal Medicine (Medical Oncology)
1901 S 2ND ST
MCALLEN, TX 78503
Internal Medicine (Medical Oncology)
1901 S 2ND ST
MCALLEN, TX 78503
Nurse Practitioner
1901 S 2ND ST
MCALLEN, TX 78503

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Guillermo Lazo-diaz's NPI number?

The NPI number for Guillermo Lazo-diaz is 1760421101. It was assigned to this individual provider in the NPPES registry on June 4, 2006.

Where is Guillermo Lazo-diaz located?

Guillermo Lazo-diaz practices at 1901 S 2nd St, Mcallen, TX 78503. The listed phone number is (956) 687-5150.

What is Guillermo Lazo-diaz's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Medical Oncology, with taxonomy code 207RX0202X.

Is Guillermo Lazo-diaz enrolled in Medicare?

Yes. Guillermo Lazo-diaz is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

What insurance does Guillermo Lazo-diaz accept?

Health plans from Ambetter from Arizona Complete Health, Ambetter from Arkansas Health & Wellness, Ambetter from Louisiana Healthcare Connections, Ambetter from Superior HealthPlan and Ambetter of Oklahoma and 6 other insurers list Guillermo Lazo-diaz as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

Is Guillermo Lazo-diaz affiliated with any hospitals?

According to CMS data, Guillermo Lazo-diaz is affiliated with South Texas Health System, Rio Grande Regional Hospital and Doctors Hosptal At Renaissance.

When was this NPI record last updated?

The NPPES record for Guillermo Lazo-diaz was last updated on December 11, 2008. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 17 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.