Dr Oliver Ezekiel Aregullin, MD - Medicare Internal Medicine in Austin, TX

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Dr Oliver Ezekiel Aregullin, MD is a medicare enrolled "Internal Medicine - Interventional Cardiology" physician in Austin, Texas. His current practice location is 9835 N Lake Creek Pkwy, Austin, Texas. You can reach out to his office (for appointments etc.) via phone at (737) 229-3500.

Dr Oliver Ezekiel Aregullin is licensed to practice in Texas (license number U8939) and he also participates in the medicare program. He does not accept medicare assignments directly but he may accept medicare through third-party (refer to Reassignment section below) and may also prescribe medicare part D drugs. His NPI Number is 1275882599.

Contact Information

Dr Oliver Ezekiel Aregullin, MD
9835 N Lake Creek Pkwy,
Austin, TX 78717-6210
(737) 229-3500
Not Available

Map and Direction




Physician's Profile

Full NameDr Oliver Ezekiel Aregullin
GenderMale
SpecialityInternal Medicine - Interventional Cardiology
Location9835 N Lake Creek Pkwy, Austin, Texas
Accepts Medicare AssignmentsMedicare enrolled and may accept medicare through third-party reassignment. May prescribe medicare part D drugs.
  NPI Data:
  • NPI Number: 1275882599
  • Provider Enumeration Date: 08/31/2012
  • Last Update Date: 12/29/2025
  Medicare PECOS Information:
  • PECOS PAC ID: 4789953688
  • Enrollment ID: I20240216000980

Medical Identifiers

Medical identifiers for Dr Oliver Ezekiel Aregullin such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1275882599NPI-NPPES

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
208000000XPediatrics 110254 (Florida)Secondary
207RA0002XInternal Medicine - Adult Congenital Heart Disease 4301112330 (Michigan)Secondary
2080P0202XPediatrics - Pediatric Cardiology U8939 (Texas)Secondary
207RI0011XInternal Medicine - Interventional Cardiology U8939 (Texas)Primary
2080P0202XPediatrics - Pediatric Cardiology 4301112330 (Michigan)Secondary
207RI0011XInternal Medicine - Interventional Cardiology 4301112330 (Michigan)Secondary

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. Dr Oliver Ezekiel Aregullin allows following entities to bill medicare on his behalf.
Entity NameTexas Childrens Physician Group
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1861675506
PECOS PAC ID: 4385722081
Enrollment ID: O20080422000209
Entity NameBaylor College Of Medicine
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1285079764
PECOS PAC ID: 0648405738
Enrollment ID: O20131025000939

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. Dr Oliver Ezekiel Aregullin 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
Dr Oliver Ezekiel Aregullin, MD
100 Michigan St Ne # Mc845,
Grand Rapids, MI 49503-2560

Ph: () -		Dr Oliver Ezekiel Aregullin, MD
9835 N Lake Creek Pkwy,
Austin, TX 78717-6210

Ph: (737) 229-3500

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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