Margarita M Ontiveros, MD - Medicare Cardiovascular Disease (cardiology) in San Antonio, TX

Margarita M Ontiveros, MD is a medicare enrolled "Internal Medicine - Cardiovascular Disease" physician in San Antonio, Texas. She went to Un Of California, Irvine, College Of Medicine and graduated in 1987 and has 37 years of diverse experience with area of expertise as Cardiovascular Disease (cardiology). She is a member of the group practice Methodist Physician Practices Pllc and her current practice location is 311 Camden St, Suite 102, San Antonio, Texas. You can reach out to her office (for appointments etc.) via phone at (210) 281-9800.

Margarita M Ontiveros is licensed to practice in Texas (license number H5196) and she also participates in the medicare program. She accepts medicare assignments (which means she accepts the Medicare-approved amount; you will not be billed for any more than the Medicare deductible and coinsurance) and her NPI Number is 1346310968.

Contact Information

Margarita M Ontiveros, MD
311 Camden St, Suite 102,
San Antonio, TX 78215-2012
(210) 281-9800
(210) 281-1001

Map and Direction




Physician's Profile

Full NameMargarita M Ontiveros
GenderFemale
SpecialityCardiovascular Disease (cardiology)
Experience37 Years
Location311 Camden St, San Antonio, Texas
Accepts Medicare AssignmentsYes. She accepts the Medicare-approved amount; you will not be billed for any more than the Medicare deductible and coinsurance.
  Medical Education and Training:
  • Margarita M Ontiveros attended and graduated from Un Of California, Irvine, College Of Medicine in 1987
  NPI Data:
  • NPI Number: 1346310968
  • Provider Enumeration Date: 11/09/2006
  • Last Update Date: 05/01/2008
  Medicare PECOS Information:
  • PECOS PAC ID: 0547171688
  • Enrollment ID: I20110118000310

Medical Identifiers

Medical identifiers for Margarita M Ontiveros such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1346310968NPI-NPPES
0083HBOtherTXBLUE CROSS BLUE SHIELD
123672105MedicaidTX

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207RC0000XInternal Medicine - Cardiovascular Disease H5196 (Texas)Primary

Medical Facilities Affiliation

Facility NameLocationFacility Type
Methodist HospitalSan antonio, TXHospital

Group Practice Association

Group Practice NameGroup PECOS PAC IDNo. of Members
Methodist Physician Practices Pllc8022171974153

Medicare Reassignments

Some practitioners may not bill the customers directly but medicare billing happens through clinics / group practice / hospitals where the provider works. Medicare reassignment of benefits is a mechanism by which practitioners allow third parties to bill and receive payment for medicare services performed by them. Margarita M Ontiveros allows following entities to bill medicare on her behalf.
Entity NameMethodist Physician Practices Pllc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1922252717
PECOS PAC ID: 8022171974
Enrollment ID: O20090121000165
Entity NameM M Ontiveros Md Pa
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1962697649
PECOS PAC ID: 8325237720
Enrollment ID: O20110118000240
Entity NameRivercity Cardiovascular Of San Antonio Pllc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1578985610
PECOS PAC ID: 0042433807
Enrollment ID: O20140523000115

Medicare Part D Prescriber Enrollment

Any physician or other eligible professional who prescribes Part D drugs must either enroll in the Medicare program or opt out in order to prescribe drugs to their patients with Part D prescription drug benefit plans. Margarita M Ontiveros is enrolled with medicare and thus, if eligible, can prescribe medicare part D drugs to patients with medicare part D benefits.

Mailing Address and Practice Location

Mailing AddressPractice Location Address
Margarita M Ontiveros, MD
311 Camden St, Suite 102,
San Antonio, TX 78215-2012

Ph: (210) 281-9800
Margarita M Ontiveros, MD
311 Camden St, Suite 102,
San Antonio, TX 78215-2012

Ph: (210) 281-9800

Reviews and Comments


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Medicare Program: Medicare is a federal government program which provides health insurance to people who are 65 or older. This program also covers certain younger people with disabilities (who receive Social Security Disability Insurance - SSDI), and people with End-Stage Renal Disease (permanent kidney failure requiring dialysis or a transplant, sometimes called ESRD.

Medicare Assignment: Assignment means that your doctor, provider, or supplier agrees (or is required by law) to accept the Medicare-approved amount as full payment for covered services. Most doctors, providers, and suppliers accept assignment, but you should always check to make sure. Participating providers have signed an agreement to accept assignment for all Medicare-covered services.

NPI Number: The National Provider Identifier (NPI) is a unique identification number for covered health care providers. The NPI must be used in lieu of legacy provider identifiers in the HIPAA standards transactions. Covered health care providers and all health plans and health care clearinghouses must use the NPIs in the administrative and financial transactions adopted under HIPAA (Health Insurance Portability and Accountability Act).

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