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

Individual provider Medical Oncology Physician · NPI 1265459168

Dr. Ronald L Drengler, MD practises Medical Oncology in San Antonio, Texas. Qualified in 1988, 38 years ago. Practices with South Texas Oncology and Hematology, PLLC, a 39-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.

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Practice location Address checks out

4383 Medical Dr
San Antonio, TX 78229-3307 Not confirmed with CMS for 13 years — call before visiting
Phone: (210) 593-5700
Fax: (210) 593-5992
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Medical Oncology Physician (primary) Taxonomy 207RX0202X · Licence J4091 (TX)

Record details

NPI number1265459168
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedJuly 16, 2006
Last updated in NPPESJuly 11, 2013

Medicare enrollment

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

Medicare specialtyMEDICAL ONCOLOGY
Medical schoolOTHER
Graduated 1988 (38 years in practice)
Group practice South Texas Oncology And Hematology, Pllc — 39 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations2 on file with Medicare

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients355
Average patient age76

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician.

  • Methodist Hospital Hospital · San Antonio, TX
  • Mi Familia Home Health Home health agency · Corpus Christi, TX

Colleagues at South Texas Oncology and Hematology, PLLC

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 39 clinicians in the practice; 12 are shown here.

Other providers in San Antonio