Oscar Alberto Iznaola -Esquivel, M.D.
Nephrology Physician · San Antonio, TX
Oscar Alberto Iznaola -Esquivel, M.D. is a nephrology physician with a practice address in San Antonio, Texas, and NPI 1699968560, issued on Aug 23, 2007. Check the license (Texas N2126, as entered in NPPES) on the Texas Medical Board; the Medicare figures below come from public CMS files.
- Name
- Oscar Alberto Iznaola -Esquivel
- Credential
- M.D.
- Primary taxonomy
- Nephrology Physician 207RN0300X
- License numbers
- N2126 TX
BP30027810 TX
Self-reported in NPPES; status is on the state search - Practice location
- 1141 N Loop 1604 E, San Antonio, TX 78232
- Phone
- (361) 239-2851
- Enumerated
- Aug 23, 2007
- Record last updated
- Mar 6, 2020 (not updated in 6 years: call before relying on the address or phone)
- Medicaid ID
- 207474204 TX
- Medicare enrollment
- Enrolled (PECOS I20090813000461); may accept Medicare assignment
- Entity
- Type 1 · individual
8 nearest nephrology physician records → All 1,159 in Texas → Look up another NPI →
Also registered at 1141 N Loop 1604 E
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Xixi ChenElectroneurodiagnostic Specialist/Technologist1689057531
- Maribel Gomez, CNIMElectroneurodiagnostic Specialist/Technologist1861878514
- Denise MoraElectroneurodiagnostic Specialist/Technologist1043721814
- Khin NyoElectroneurodiagnostic Specialist/Technologist1548632292
Verify Oscar Alberto Iznaola -Esquivel in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersTexas Medical Board
Search for license N2126Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
80% fewer Medicare Part D claims than the average nephrology physician in 2024
292 Medicare Part D claims for 35 beneficiaries, against an average of 1,465 among the 10,986 providers of this specialty who prescribed in Part D. Brand-name drugs were 7% of claims.
Most prescribed
- Calcium Acetate49 claims
- Nifedipine Er32 claims
- Sevelamer Carbonate15 claims
- Amlodipine Besylate13 claims
- Rosuvastatin Calcium13 claims
- Losartan Potassium12 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Bills Medicare through one group practice
- Center For Internal Medicine PASan Antonio, TX
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Oscar Alberto Iznaola -Esquivel among 1,159 nephrology physician records in Texas
Oscar Alberto Iznaola -Esquivel, M.D. is one of 1,159 nephrology physician records with a practice address in Texas. 89% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 47% of them.
- NPI issued2007 · 47% of these records are older, 38% newer
- In a Medicare fileYes · 89% of these records are
- In the CMS Doctors and Clinicians fileYes · 82% of these records are
- Graduated2000 · median 2001 among the 954 with a school on file
- Record last updated2020 · 47% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RN0300X and a Texas practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Nephrology Physician providers in Texas
There are 1,159 nephrology physician records in Texas.
All 1,159 in Texas → Every provider in San Antonio → Nephrology Physician nationwide →
The 8 nephrology physician records with the nearest ZIP codes
- Adrian Wong, M.D.San Antonio, TX 782321487909867
- Flavio Alvarez, MDLive Oak, TX 782331932175601
- Shweta Bansal, MDSan Antonio, TX 782311215083894
- Judith Hernandez, M.D.Live Oak, TX 782331124284757
- Brijesh Kapoor, M.D.Live Oak, TX 782331518988104
- Milagros Martinez, M.D.Live Oak, TX 782331518131960
- Cynthia Monroe, MDLive Oak, TX 782331629044227
- Navid Saigal, MDLive Oak, TX 782331427024231
Common questions
What is Oscar Alberto Iznaola -Esquivel, M.D.'s NPI number?
Oscar Alberto Iznaola -Esquivel, M.D.'s National Provider Identifier (NPI) is 1699968560, issued on Aug 23, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Oscar Alberto Iznaola -Esquivel, M.D. located?
The NPPES record lists a practice address at 1141 N Loop 1604 E, San Antonio, TX, 78232. Phone: (361) 239-2851. Providers update this record themselves, so call before visiting.
How can I verify Oscar Alberto Iznaola -Esquivel, M.D.'s license?
NPPES lists Texas license number N2126, as entered by the provider. Search the Texas Medical Board at https://profile.tmb.state.tx.us/Search.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Oscar Alberto Iznaola -Esquivel, M.D. prescribe under Medicare Part D?
In 2024, Oscar Alberto Iznaola -Esquivel, M.D. had 292 Medicare Part D claims for 35 beneficiaries; the average among nephrology physician prescribers was 1,465. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.