Margarita M. Ontiveros, MD
Cardiovascular Disease Physician · San Antonio, TX
Margarita M. Ontiveros, MD is a cardiovascular disease physician with a practice address in San Antonio, Texas, and NPI 1346310968, issued on Nov 9, 2006. Check the license (Texas H5196, as entered in NPPES) on the Texas Medical Board; the Medicare figures below come from public CMS files.
- Name
- Margarita M. Ontiveros
- Credential
- MD
- Primary taxonomy
- Cardiovascular Disease Physician 207RC0000X
- License number
- H5196 TX
Self-reported in NPPES; status is on the state search - Practice location
- 311 Camden St, San Antonio, TX 78215
- Phone
- (210) 281-9800
- Enumerated
- Nov 9, 2006
- Record last updated
- May 1, 2008 (not updated in 18 years: call before relying on the address or phone)
- Fax
- (210) 281-1001
- Medicaid ID
- 123672105 TX
- Medicare enrollment
- Enrolled (PECOS I20110118000310); accepts Medicare assignment
- Medical or professional school
- Un Of California, Irvine, College Of Medicine, 1987
- Entity
- Type 1 · individual
8 nearest cardiovascular disease physician records → All 1,603 in Texas → Look up another NPI →
Also registered at 311 Camden St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Margarita M. Ontiveros in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersTexas Medical Board
Search for license H5196Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
44% more Medicare Part D claims than the average cardiovascular disease physician in 2024
4,425 Medicare Part D claims for 898 beneficiaries, against an average of 3,078 among the 20,728 providers of this specialty who prescribed in Part D. Brand-name drugs were 15% of claims.
Most prescribed
- Carvedilol505 claims
- Metoprolol Succinate434 claims
- Isosorbide Mononitrate Er330 claims
- Amlodipine Besylate315 claims
- Nitroglycerin270 claims
- Losartan Potassium257 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.
The practice group's MIPS final score for 2023 (Medicare payment program): 100 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $5,161.65
121 payments; by number, the most common kind was food and beverage; the largest payer was Penumbra, Inc. The 16,686 providers of this specialty with any payment received $3,819.56 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Methodist Physician Practices PLLCSan Antonio, TX
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Margarita M. Ontiveros among 1,603 cardiovascular disease physician records in Texas
Margarita M. Ontiveros, MD is one of 1,603 cardiovascular disease physician records with a practice address in Texas. 88% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 20% of them.
- NPI issued2006 · 20% of these records are older, 42% newer
- In a Medicare fileYes · 88% of these records are
- In the CMS Doctors and Clinicians fileYes · 76% of these records are
- Graduated1987 · median 1998 among the 1,219 with a school on file
- Record last updated2008 · 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 207RC0000X and a Texas practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Cardiovascular Disease Physician providers in Texas
There are 1,603 cardiovascular disease physician records in Texas.
All 1,603 in Texas → Every provider in San Antonio → Cardiovascular Disease Physician nationwide →
The 8 cardiovascular disease physician records with the nearest ZIP codes
- Evan Mokwe, MDSan Antonio, TX 782151346389335
- Manoj Panday, M.D.San Antonio, TX 782151790834281
- Chinelo Udemgba Aguocha, M.D.San Antonio, TX 782151750709341
- Hector Villasenor, MDSan Antonio, TX 782151215016480
- Michael Wilson, M.D.San Antonio, TX 782151972617793
- William Wu, M.D.San Antonio, TX 782151346246626
- Subrata Talukdar, MDSan Antonio, TX 782161437149630
- Gregory Buser, M.D.San Antonio, TX 782171548280407
Common questions
What is Margarita M. Ontiveros, MD's NPI number?
Margarita M. Ontiveros, MD's National Provider Identifier (NPI) is 1346310968, issued on Nov 9, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Margarita M. Ontiveros, MD located?
The NPPES record lists a practice address at 311 Camden St, San Antonio, TX, 78215. Phone: (210) 281-9800. Providers update this record themselves, so call before visiting.
How can I verify Margarita M. Ontiveros, MD's license?
NPPES lists Texas license number H5196, 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 Margarita M. Ontiveros, MD prescribe under Medicare Part D?
In 2024, Margarita M. Ontiveros, MD had 4,425 Medicare Part D claims for 898 beneficiaries; the average among cardiovascular disease physician prescribers was 3,078. Part D covers Medicare prescriptions only.
What is Margarita M. Ontiveros, MD's MIPS final score?
The 2023 MIPS final score is 100 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
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.