Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
NPIDirectory

Margarita M Ontiveros, MD

Individual provider Cardiovascular Disease Physician · NPI 1346310968

Margarita M Ontiveros, MD is a Cardiovascular Disease (Cardiology) in San Antonio, Texas. Graduated from Un of California, Irvine, College of Medicine in 1987, 39 years ago. Practices with Methodist Physician Practices PLLC, a 173-clinician group and accepts Medicare assignment. Licensed in Texas.

Years since qualifying
39
Trained at
Un of California, Irvine, College of Medicine
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

311 Camden St Ste 102
San Antonio, TX 78215-2012
Phone: (210) 281-9800
Fax: (210) 281-1001
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Cardiovascular Disease Physician (primary) Taxonomy 207RC0000X · Licence H5196 (TX)

Record details

NPI number1346310968
Entity typeIndividual (Type 1)
GenderFemale
Credentials MD
Sole proprietorYes
NPI enumeratedNovember 9, 2006
Last updated in NPPESMay 1, 2008

Medicare enrollment

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

Medicare specialtyCARDIOVASCULAR DISEASE (CARDIOLOGY)
Medical schoolUN OF CALIFORNIA, IRVINE, COLLEGE OF MEDICINE
Graduated 1987 (39 years in practice)
Group practice Methodist Physician Practices Pllc — 173 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations6 on file with Medicare

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