Gregorio R Riera, MD - Medicare Obstetrics & Gynecology in Houston, TX

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Gregorio R Riera, MD is a medicare enrolled "Obstetrics & Gynecology - Obstetrics" physician in Houston, Texas. His current practice location is 6620 Main St, Suite 1450, Houston, Texas. You can reach out to his office (for appointments etc.) via phone at (713) 798-7500.

Gregorio R Riera is licensed to practice in Texas (license number M7573) 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 1821282278.

Contact Information

Gregorio R Riera, MD
6620 Main St, Suite 1450,
Houston, TX 77030-2348
(713) 798-7500
(713) 798-3487

Map and Direction




Physician's Profile

Full NameGregorio R Riera
GenderMale
SpecialityObstetrics & Gynecology - Obstetrics
Location6620 Main St, Houston, Texas
Accepts Medicare AssignmentsMedicare enrolled and may accept medicare through third-party reassignment. May prescribe medicare part D drugs.
  NPI Data:
  • NPI Number: 1821282278
  • Provider Enumeration Date: 08/29/2007
  • Last Update Date: 11/03/2010
  Medicare PECOS Information:
  • PECOS PAC ID: 1951484831
  • Enrollment ID: I20080215000225

Medical Identifiers

Medical identifiers for Gregorio R Riera such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1821282278NPI-NPPES

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207VG0400XObstetrics & Gynecology - Gynecology M7573 (Texas)Secondary
207VX0000XObstetrics & Gynecology - Obstetrics M7573 (Texas)Primary

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. Gregorio R Riera allows following entities to bill medicare on his behalf.
Entity NameBaylor College Of Medicine
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1053352914
PECOS PAC ID: 8224941265
Enrollment ID: O20031106000562
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: 1881026664
PECOS PAC ID: 8022243971
Enrollment ID: O20131030000972

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. Gregorio R Riera 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
Gregorio R Riera, MD
Po Box 4775,
Houston, TX 77210-4775

Ph: (713) 798-6088		Gregorio R Riera, MD
6620 Main St, Suite 1450,
Houston, TX 77030-2348

Ph: (713) 798-7500

Reviews and Comments


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Dr. Kimberly R Miller-miles, M.D.
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Practice Location: 7900 Fannin St Ste 4400, Women's Pelvic Restorative Center, Pllc, Houston, TX 77054
Phone: 713-512-7600    Fax: 281-338-2982

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).

Our Data: Information on www.medicarelist.com is built using data sources published by Centers for Medicare & Medicaid Services (CMS) under Freedom of Information Act (FOIA). The information disclosed on the NPI Registry are FOIA-disclosable and are required to be disclosed under the FOIA and the eFOIA amendments to the FOIA. There is no way to 'opt out' or 'suppress' the NPPES record data for health care providers with active NPIs.