Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
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Oscar Alberto Iznaola -Esquivel, MD

Individual provider Geriatric Medicine (Internal Medicine) Physician · NPI 1699968560

Oscar Alberto Iznaola -Esquivel, MD practises Internal Medicine in San Antonio, Texas. Qualified in 2000, 26 years ago. Licensed in Texas.

Years since qualifying
26
Licensed in
TX
In the registry since
2007
Specialties on file
3
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

1141 N Loop 1604 E 105-434
San Antonio, TX 78232-1339
Phone: (361) 239-2851
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Nephrology Physician (primary) Taxonomy 207RN0300X · Licence N2126 (TX)
Geriatric Medicine (Internal Medicine) Physician Taxonomy 207RG0300X · Licence N2126 (TX)
Student in an Organized Health Care Education/Training Program Taxonomy 390200000X · Licence BP30027810 (TX)

Record details

NPI number1699968560
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedAugust 23, 2007
Last updated in NPPESMarch 6, 2020
Certification dateMarch 6, 2020

Medicare enrollment

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

Medicare specialtyINTERNAL MEDICINE
Also practisesGERIATRIC MEDICINE, NEPHROLOGY
Medical schoolOTHER
Graduated 2000 (26 years in practice)
Accepts Medicare assignment Not indicated
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 patients153
Services billed 2,198 a service is one billed item, such as a visit, a test or a procedure
Average patient age72

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.

Payments from drug and device companies, 2025

Drug and device makers are required by federal law (the Physician Payments Sunshine Act) to report what they pay or give to clinicians, and CMS publishes the reports as Open Payments. This is the 2025 program year. A report is a record of a payment, not an allegation of anything, and many are small items such as meals. Only general payments are listed here; research payments and ownership or investment interests are reported separately by CMS and are not shown.

Food and Beverage $180 4 payments · a meal or drink at a meeting or visit, not a fee

Each amount is the sum of what companies reported for that kind of payment in 2025, rounded to the dollar. Not all of it is income to the clinician: a meal is not a fee, a charitable contribution goes to a charity, and a royalty or an acquisition payment is not a salary.

Check a report, or dispute one, at the source in CMS’s own tool, Open Payments. Corrections go through CMS’s dispute process. This site removes a home address on request and asks for no proof, because that is privacy; it will not remove an accurate payment report on request, because that is a statutory public disclosure.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician. Those with a page here are linked.

  • University Health System Hospital · San Antonio, TX
  • IRC - San Antonio - Castroville Dialysis facility · San Antonio, TX · listed as Kidney Treatment Center San Antonio Inc
  • IRC-San Antonio Medical Drive Dialysis facility · San Antonio, TX · listed as Irc Hill Country LLC
  • San Antonio Specialty Hospital Ltd Long-term care hospital · San Antonio, TX
  • Baptist Medical Center Hospital · San Antonio, TX
  • Christus Santa Rosa Medical Center Hospital · San Antonio, TX
  • Methodist Hospital Hospital · San Antonio, TX
  • Methodist Hospital Stone Oak Hospital · San Antonio, TX
  • Carmen Lakeway Dialysis facility · Lakeway, TX

Also affiliated with 1 long-term care hospital, which CMS identifies by certification number only.

Other providers in San Antonio