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DR. ROBERT MICHAEL DIAZ MD
NPI 1275154890
Surgery in Dallas, TX

Active since May 05, 2020PECOS Enrolled
3500 GASTON AVE, DALLAS, TX 75246(214) 820-2362(214) 820-7272 Get Directions Write a Review

NPPES record last updated: March 24, 2026. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Mar 24, 2026, Jun 17, 2025, May 5, 2020 (3 updates tracked since 2020).

About Dr. Robert Michael Diaz Md NPPES

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

DR. ROBERT MICHAEL DIAZ MD (NPI 1275154890) is an individual surgery provider in Dallas, Texas, licensed in Texas (V9887) and active in the NPI registry since May 2020. He is enrolled in Medicare PECOS and is a graduate of Other (2020).

NPPES Registry Identity

NPI1275154890
Entity TypeIndividualMale
Primary Taxonomy208600000X
Provider Legal NameDR. ROBERT MICHAEL DIAZCredential: MD
Location Address3500 GASTON AVEDallas, TX 75246-2088
Mailing Address10710 Mcpherson Rd Ste 306Laredo, TX 78045-6271 · (432) 352-2057
Phone(214) 820-2362
Fax(214) 820-7272
Sole ProprietorNo
Medical School CMSOtherGraduated 2020
Enumeration DateMay 5, 2020
Last NPPES UpdateMarch 24, 20263 updates tracked since enumeration
NPPES CertifiedMarch 24, 2026
✔ NPI 1275154890 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtySurgeryAllopathic & Osteopathic Physicians
Taxonomy Code208600000X
License✔ Licensed in TX · V9887
Definition
A general surgeon has expertise related to the diagnosis - preoperative, operative and postoperative management - and management of complications of surgical conditions in the following areas: alimentary tract; abdomen; breast, skin and soft tissue; endocrine system; head and neck surgery; pediatric surgery; surgical critical care; surgical oncology; trauma and burns; and vascular surgery. General surgeons increasingly provide care through the use of minimally invasive and endoscopic techniques. Many general surgeons also possess expertise in transplantation surgery, plastic surgery and cardiothoracic surgery.
Also ListedStudent in an Organized Health Care Education/Training ProgramTaxonomy 390200000X · License BP10071715 (TX)
3500 GASTON AVE, Dallas, TX 75246
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Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Blue Cross and Blue Shield of Texas.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. Robert Michael Diaz Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

PECOS PAC ID7214491042
PECOS Enrollment IDI20260713004130
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.

Medicare Billing Reassignment

Medicare enrollment records show Robert Diaz reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Laredo Physicians Group
392 mi
Family Medicine
10710 MCPHERSON RD, SUITE 300
Laredo, TX 78045
  • Reassigned Medicare billing, Texas enrollment
  • 29 clinicians in this Medicare group
NPI 1659619260 (956) 794-8853

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 75246 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
$88.19 typical visit price
range $57.18 – $172.86
Typical copayment $22.04 (range $14.29 – $43.21)
Most-billed visit code 99203
Established Patient
$71.28 typical visit price
range $18.48 – $141.20
Typical copayment $17.82 (range $4.62 – $35.30)
Most-billed visit code 99213
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 20

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

DR. JAIME ALBERT CAMPBELL M.D., M.S.
Pathology (Anatomic Pathology & Clinical Pathology)
3500 GASTON AVE, BAYLOR UNIVERSITY MEDICAL CENTER, DEPT OF PATHOLOGY
DALLAS, TX 75246
Dallas County (214) 820-3772
MICHELLE CAIN AGACNP
Nurse Practitioner (Acute Care)
3500 GASTON AVE
DALLAS, TX 75246
Dallas County (214) 820-2050
DR. MATTHEW PAUL CLEMONS MD
Radiology (Diagnostic Radiology)
3500 GASTON AVE
DALLAS, TX 75246
Dallas County (214) 820-2361
ROBERT COLE FORE RN
Registered Nurse
3500 GASTON AVE
DALLAS, TX 75246
Dallas County (214) 820-0111
JAMES PIERRE D'ETIENNE MD
Emergency Medicine
3500 GASTON AVE
DALLAS, TX 75246
Dallas County (214) 820-2505
DR. JO ANN F. TRAVIS M.D.
Anesthesiology
3500 GASTON AVE, DEPARTMENT OF ANESTHESIOLOGY
DALLAS, TX 75246
Dallas County (214) 549-4835
ASIF ZIA KHATTAK MD
Pediatrics (Neonatal-Perinatal Medicine)
3500 GASTON AVE
DALLAS, TX 75246
Dallas County (214) 820-7604
FATIMA KHAN
Student in an Organized Health Care Education/Training Program
3500 GASTON AVE
DALLAS, TX 75246
Dallas County (844) 279-3627

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 Robert Diaz's NPI number?

The NPI number for Robert Diaz is 1275154890. It was assigned to this individual provider in the NPPES registry on May 5, 2020.

Where is Robert Diaz located?

Robert Diaz practices at 3500 Gaston Ave, Dallas, TX 75246. The listed phone number is (214) 820-2362.

What is Robert Diaz's specialty?

The primary specialty registered for this NPI is Surgery with taxonomy code 208600000X.

Is Robert Diaz enrolled in Medicare?

Yes. Robert Diaz is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Robert Diaz's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Robert Diaz reassigns Medicare benefits to Laredo Physicians Group (Laredo, TX). The reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Robert Diaz's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Robert Diaz accept?

Health plans from Blue Cross and Blue Shield of Texas list Robert 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.

When was this NPI record last updated?

The NPPES record for Robert Diaz was last updated on March 24, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 7 months 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.