Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.

Guillermo D. Marquez, MD

Individual provider Surgery Physician · NPI 1861454563

Guillermo D. Marquez, MD is a General Surgery in Mission, Texas. Qualified in 1988, 38 years ago. Practices with Rgv Surgical Associates, PLLC, a 2-clinician group and accepts Medicare assignment. Licensed in Texas.

Years since qualifying
38
Licensed in
TX
In the registry since
2006
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

See every abbreviation used in this directory →

Practice location Address checks out

910 S Bryan Rd Ste 202
Mission, TX 78572-6659
Phone: (956) 682-6126
Fax: (956) 580-0464
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Surgery Physician (primary) Taxonomy 208600000X · Licence K1544 (TX)

Record details

NPI number1861454563
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedApril 6, 2006
Last updated in NPPESMarch 5, 2019
Mailing address910 S Bryan Rd, Ste 202, Mission, TX 78572-6659

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyGENERAL SURGERY
Medical schoolOTHER
Graduated 1988 (38 years in practice)
Group practice Rgv Surgical Associates, Pllc — 2 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

Other providers in Mission