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

David Alan Diaz, MD

Individual provider Family Medicine Physician · NPI 1033106380

David Alan Diaz, MD is a Family Practice in Round Rock, Texas. Graduated from University of Texas Southwestern Medical School at Dallas in 1990, 36 years ago. Practices with Great Oaks Family Practice PA, a 2-clinician group and accepts Medicare assignment. Licensed in Texas.

Years since qualifying
36
Trained at
University of Texas Southwestern Medical School at Dallas
Licensed in
TX
In the registry since
2005
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

15930 S Great Oaks Dr A-200
Round Rock, TX 78681-5526
Phone: (512) 246-3338
Fax: (512) 246-3368
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Family Medicine Physician (primary) Taxonomy 207Q00000X · Licence J1080 (TX)

Record details

NPI number1033106380
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedOctober 3, 2005
Last updated in NPPESJuly 13, 2026
Mailing address15930 S Great Oaks Dr, A-200, Round Rock, TX 78681-5526

Medicare enrollment

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

Medicare specialtyFAMILY PRACTICE
Medical schoolUNIVERSITY OF TEXAS SOUTHWESTERN MEDICAL SCHOOL AT DALLAS
Graduated 1990 (36 years in practice)
Group practice Great Oaks Family Practice Pa — 2 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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