Enrique O. Ortiz-Diaz, M.D.
Critical Care Medicine (Internal Medicine) Physician · San Antonio, TX
Enrique O. Ortiz-Diaz, M.D. is a critical care medicine (internal medicine) physician with a practice address in San Antonio, Texas, and NPI 1275737660, issued on Jun 12, 2007. Check the license (Texas R9261, as entered in NPPES) on the Texas Medical Board; the Medicare figures below come from public CMS files.
- Name
- Enrique O. Ortiz-Diaz
- Credential
- M.D.
- Primary taxonomy
- Critical Care Medicine (Internal Medicine) Physician 207RC0200X
- License numbers
- R9261 TX
ME120804 FL
017287 PR
Self-reported in NPPES; status is on the state search - Practice location
- 4458 Medical Dr Ste 505, San Antonio, TX 78229
- Phone
- (210) 690-7400
- Enumerated
- Jun 12, 2007
- Record last updated
- Jan 16, 2025
- Fax
- (210) 690-7405
- Medicare enrollment
- Enrolled (PECOS I20190116002308); accepts Medicare assignment
- Medical or professional school
- University Of Puerto Rico School Of Medicine, 2005
- Entity
- Type 1 · individual
8 nearest critical care medicine (internal medicine) physician records → All 413 in Texas → Look up another NPI →
Also registered at 4458 Medical Dr Ste 505
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Ahmad AltarawnehNephrology Physician1487933446
- Bravein Amalakuhan, M.D.Pulmonary Disease Physician1053623512
- Aristides Armas Villalba, MDPulmonary Disease Physician1225559081
- Praveen Belur, M.D.Pulmonary Disease Physician1083091771
- Kimberly Booth, NPAcute Care Nurse Practitioner1063954964
Verify Enrique O. Ortiz-Diaz in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersTexas Medical Board
Search for license R9261Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
97% fewer Medicare Part D claims than the average critical care medicine (internal medicine) physician in 2024
22 Medicare Part D claims for 13 beneficiaries, against an average of 696 among the 2,873 providers of this specialty who prescribed in Part D.
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.
2 hospitals and group practices
- Hospital Menonita Caguas IncCaguas, PR · Acute Care Hospitals
- Texas Ips LLCSan Antonio, TX
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through); hospitals matched to CMS Hospital General Information (Care Compare) (data.cms.gov).
Enrique O. Ortiz-Diaz among 413 critical care medicine (internal medicine) physician records in Texas
Enrique O. Ortiz-Diaz, M.D. is one of 413 critical care medicine (internal medicine) physician records with a practice address in Texas. 90% 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 30% of them.
- NPI issued2007 · 30% of these records are older, 59% newer
- In a Medicare fileYes · 90% of these records are
- In the CMS Doctors and Clinicians fileYes · 84% of these records are
- Graduated2005 · median 2007 among the 346 with a school on file
- Record last updated2025 · 40% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RC0200X and a Texas practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Critical Care Medicine (Internal Medicine) Physician providers in Texas
There are 413 critical care medicine (internal medicine) physician records in Texas.
All 413 in Texas → Every provider in San Antonio → Critical Care Medicine (Internal Medicine) Physician nationwide →
The 8 critical care medicine (internal medicine) physician records with the nearest ZIP codes
- Christopher Burdick, MDSan Antonio, TX 782291396913745
- Patrick Cullinan, DOSan Antonio, TX 782291043389653
- Omar Enriquez, MDSan Antonio, TX 782291194822858
- Rachel Garvin, MDSan Antonio, TX 782291356560676
- John Hunninghake, M.D.San Antonio, TX 782291386986701
- Jeffrey Javed, MDSan Antonio, TX 782291952697179
- Holly Keyt, MDSan Antonio, TX 782291699902965
- Phillip Mason, MDSan Antonio, TX 782291952390841
Common questions
What is Enrique O. Ortiz-Diaz, M.D.'s NPI number?
Enrique O. Ortiz-Diaz, M.D.'s National Provider Identifier (NPI) is 1275737660, issued on Jun 12, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Enrique O. Ortiz-Diaz, M.D. located?
The NPPES record lists a practice address at 4458 Medical Dr Ste 505, San Antonio, TX, 78229. Phone: (210) 690-7400. Providers update this record themselves, so call before visiting.
How can I verify Enrique O. Ortiz-Diaz, M.D.'s license?
NPPES lists Texas license number R9261, 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 Enrique O. Ortiz-Diaz, M.D. prescribe under Medicare Part D?
In 2024, Enrique O. Ortiz-Diaz, M.D. had 22 Medicare Part D claims for 13 beneficiaries; the average among critical care medicine (internal medicine) physician prescribers was 696. 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.