Dr. Margarita Ontiveros, MD
What this data tells you about Dr. Ontiveros
Dr. Margarita Ontiveros is a cardiovascular disease specialist in San Antonio, TX, with 19 years of NPI registration. Based on federal Medicare data, Dr. Ontiveros performed 1,053 Medicare services across 804 unique beneficiaries.
Between the years covered by Open Payments, Dr. Ontiveros received a total of $27,064 from 48 pharmaceutical and/or device companies across 828 individual payments. These payments are legal, publicly disclosed under the federal Sunshine Act, and common in cardiovascular disease. Most payments are for meals and travel — low-value interactions common across virtually all practicing physicians. Patients may wish to discuss these relationships with their provider.
The Data Coverage level for Dr. Ontiveros is Very High — reflecting how much public federal data is available about this provider. This is not a quality rating. Patients are encouraged to use this data as one of several factors when choosing a healthcare provider.
Medicare Practice Summary
Medicare Utilization ↗Top procedures by volume
Ranked by number of services performed for Medicare patients. Avg. submitted charge is what the provider billed; avg. Medicare payment is what CMS paid.
| Procedure | Volume | Avg. paid | Avg. submitted |
|---|---|---|---|
| Office visit, established patient (30-39 min) | 281 | $79 | $258 |
| Electrocardiogram (EKG), 12-lead | 276 | $9 | $50 |
| Office visit, established patient, complex (40-54 min) | 166 | $126 | $347 |
| Exercise or drug-induced heart stress test with electrocardiogram (ecg) with supervision by physician | 53 | $16 | $59 |
| Regadenoson injection (Lexiscan) for heart stress test | 53 | $40 | $131 |
| Echocardiogram, transthoracic | 50 | $141 | $580 |
| New patient office visit, complex (60-74 min) | 25 | $137 | $498 |
| Programming of dual lead pacemaker system | 24 | $29 | $114 |
| Remote pacemaker monitoring, 90 days | 22 | $23 | $88 |
| Exercise or drug-induced heart stress test with electrocardiogram (ecg) with review by physician | 20 | $10 | $39 |
| New patient office visit (45-59 min) | 19 | $101 | $400 |
| Heart muscle strain imaging | 17 | $28 | $103 |
| Nuclear medicine studies of heart muscle at rest and with stress and spect | 16 | $332 | $1,189 |
| Electrocardiogram (ecg) up to 30 days continuous with review and report by health care professional | 16 | $19 | $66 |
| Technetium tc-99m tetrofosmin, diagnostic, per study dose | 15 | $603 | $900 |
Industry Payment Transparency
Open Payments through 2024 ↗Payment profile
Industry payments classified by relationship type. Not all payments are equal — research and consulting reflect different relationships than speaking programs or meals.
Payment trend by year
Annual totals from pharmaceutical and medical device companies.
Payments by company (2024)
Associated products mentioned in payments ›
Most payments (100%) are for meals and travel — low-value interactions that are common across virtually all practicing physicians.
Geographic Context
1.2 mi
Data Sources
| Provider Registry | ✓ NPPES | Weekly updates |
| Medicare Enrollment | ✓ PECOS | Monthly updates |
| Practice Data | ✓ Medicare Util. | Annual (CY lag) |
| Industry Payments | ✓ Open Payments | CY 2024 |
| Disciplinary History | — Not public | N/A |
This provider has data in 4 of 4 available federal datasets, with a Data Coverage level of Very High. This measures how much public data is available about a provider — not how good they are. How we calculate this →
Summary
Dr. Ontiveros is an electrophysiology & cardiac specialist, with moderate Medicare volume, with low-engagement industry engagement in the top 16% of TX peers, with 19 years of NPI registration.
This summary is auto-generated from federal data. It describes data availability and patterns — not clinical quality. Read our methodology →
Frequently Asked Questions
Is Dr. Ontiveros experienced with office visit, established patient (30-39 min)?
Does Dr. Ontiveros receive payments from pharmaceutical companies?
How do Dr. Ontiveros's costs compare to other cardiologists in San Antonio?
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All data on this page is sourced verbatim from public federal records published by the U.S. Centers for Medicare & Medicaid Services (CMS): NPPES ↗, Open Payments ↗, Medicare Provider Utilization ↗, and PECOS. Publication is mandated by the Physician Payments Sunshine Act (§6002 ACA, 42 U.S.C. §1320a-7h) and the Freedom of Information Act.
This page is not medical advice, an endorsement, a recommendation, or a quality rating. The Transparency Score measures data completeness — how much federal information exists for this provider — not clinical performance, patient outcomes, or quality of care. Always verify information directly with the provider and consult a licensed clinician before making medical decisions.
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