Oscar Iznaola -Esquivel, M.D.
NPI 1699968560 · Nephrology Physician · San Antonio, TX
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Oscar Iznaola -Esquivel, M.D. is a Nephrology Physician provider in San Antonio, TX (NPI 1699968560).
Provider details
- NPI number
- 1699968560
- Entity type
- Individual
- Primary specialty
- Nephrology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- N2126 (TX)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Student, Health Care
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
18 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
2,137 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 1,005 | $66 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 699 | $100 |
| Hemodialysis Procedure With Physician Evaluation90935 | 206 | $60 |
| Dialysis Services, 4 Or More Physician Visits Per Month (20 Years Or Older)90960 | 112 | $296 |
| Dialysis Services, 2-3 Physician Visits Per Month (20 Years Or Older)90961 | 61 | $246 |
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223 | 54 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 10 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Calcium Acetate | 49 | 18 |
| Nifedipinebrand: Nifedipine Er | 32 | — |
| Sevelamer Carbonate | 15 | — |
| Amlodipine Besylate | 13 | — |
| Rosuvastatin Calcium | 13 | — |
| Spironolactone | 12 | — |
| Losartan Potassium | 12 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2007-08-23
- Last updated
- 2020-03-06
- Certified
- 2020-03-06
Frequently asked questions
- What is Oscar Iznaola -Esquivel's NPI number?
- Oscar Iznaola -Esquivel's National Provider Identifier (NPI) is 1699968560, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Oscar Iznaola -Esquivel's specialty?
- Oscar Iznaola -Esquivel is listed in the NPPES registry with a primary specialty of Nephrology Physician (Allopathic & Osteopathic Physicians).
- Where is Oscar Iznaola -Esquivel located?
- Oscar Iznaola -Esquivel's practice location on file with NPPES is 1141 N Loop 1604 E, San Antonio, TX 78232-1339.
- What is Oscar Iznaola -Esquivel's phone number?
- The practice phone number listed in the NPPES registry for Oscar Iznaola -Esquivel is (361) 239-2851.
- Does Oscar Iznaola -Esquivel accept Medicare?
- Oscar Iznaola -Esquivel is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Oscar Iznaola -Esquivel's NPI active?
- Yes — Oscar Iznaola -Esquivel's NPI (1699968560) is active in the NPPES registry as of the last update on 2020-03-06.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.