Gustavo H. Day MD, PA
About This Business
Gustavo H. Day, M.D., is an internal medicine physician in Dallas, Texas, with 36 years of experience since completing his training in 1990, above the 27-year average among the 99 Dallas physicians in our directory. He holds an active Texas license and is registered with the national provider registry since 2006. He is affiliated with Medical City Dallas Hospital, Medical City Lewisville, and Medical City Plano. He is one of 19 internal medicine physicians among the 99 Dallas doctors in our directory. Patients rate him 4.5 across 197 reviews.
Verified Provider Info
- Specialty (per registry)
- Internal Medicine
- NPI Number
- 1538239173
- Medical school graduate
- 1990 (36+ years of practice)
- State license
- K1411 (TX)
- Hospital affiliations
- Medical City Dallas Hospital · Medical City Lewisville · Medical City Plano
Source: NPPES NPI Registry (CMS) · CMS Doctors & Clinicians dataset · checked 2026-08-18
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Information last updated: September 7, 2026
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