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

Individual provider Hematology & Oncology Physician · NPI 1427020114

Gregory J Guzley, MD is a Hematology & Oncology Physician in San Antonio, Texas. Licensed in Texas. Registered with an NPI since 2006.

Licensed in
TX
In the registry since
2006
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

4411 Medical Dr
San Antonio, TX 78229-3822
Phone: (210) 595-5300
Fax: (210) 614-8740
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Hematology & Oncology Physician (primary) Taxonomy 207RH0003X · Licence F1613 (TX)

Record details

NPI number1427020114
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedFebruary 6, 2006
Last updated in NPPESJanuary 28, 2016

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