Raul Sergio Villarreal Jr, MD - Medicare Allergy/immunology in San Antonio, TX

Raul Sergio Villarreal Jr, MD is a medicare enrolled "Allergy & Immunology" physician in San Antonio, Texas. He went to University Of Texas Southwestern Medical School At Dallas and graduated in 2015 and has 9 years of diverse experience with area of expertise as Allergy/immunology. He is a member of the group practice Allergy Asthma And Immunology Associates Of South Texas, P.a. and his current practice location is 2424 Babcock Rd Ste 301, San Antonio, Texas. You can reach out to his office (for appointments etc.) via phone at (210) 616-0882.

Raul Sergio Villarreal Jr is licensed to practice in Texas (license number S4411) and he also participates in the medicare program. He accepts medicare assignments (which means he accepts the Medicare-approved amount; you will not be billed for any more than the Medicare deductible and coinsurance) and his NPI Number is 1083008908.

Contact Information

Raul Sergio Villarreal Jr, MD
2424 Babcock Rd Ste 301,
San Antonio, TX 78229-6031
(210) 616-0882
(210) 692-7833

Map and Direction




Physician's Profile

Full NameRaul Sergio Villarreal Jr
GenderMale
SpecialityAllergy/immunology
Experience9 Years
Location2424 Babcock Rd Ste 301, San Antonio, Texas
Accepts Medicare AssignmentsYes. He accepts the Medicare-approved amount; you will not be billed for any more than the Medicare deductible and coinsurance.
  Medical Education and Training:
  • Raul Sergio Villarreal Jr attended and graduated from University Of Texas Southwestern Medical School At Dallas in 2015
  NPI Data:
  • NPI Number: 1083008908
  • Provider Enumeration Date: 03/28/2015
  • Last Update Date: 02/22/2024
  Medicare PECOS Information:
  • PECOS PAC ID: 0941582209
  • Enrollment ID: I20200507000282

Medical Identifiers

Medical identifiers for Raul Sergio Villarreal Jr such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1083008908NPI-NPPES

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207RA0201XInternal Medicine - Allergy & Immunology S4411 (Texas)Secondary
207K00000XAllergy & Immunology S4411 (Texas)Primary

Group Practice Association

Group Practice NameGroup PECOS PAC IDNo. of Members
Allergy Asthma And Immunology Associates Of South Texas, P.a.32745968537

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. Raul Sergio Villarreal Jr allows following entities to bill medicare on his behalf.
Entity NameAllergy Asthma & Immunology Associates Of South Texas, P.a.
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1023175239
PECOS PAC ID: 3274596853
Enrollment ID: O20041104000908

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. Raul Sergio Villarreal Jr 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
Raul Sergio Villarreal Jr, MD
2424 Babcock Rd Ste 301,
San Antonio, TX 78229-6031

Ph: (210) 616-0882
Raul Sergio Villarreal Jr, MD
2424 Babcock Rd Ste 301,
San Antonio, TX 78229-6031

Ph: (210) 616-0882

Reviews and Comments


Allergy & Immunology Doctors in San Antonio, TX

Chioma Udemgba, M.D.
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Gordana Gligoric, MD
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Phone: 210-807-3889    Fax: 210-888-5851
Erica Elizabeth Garcia, APRN
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Practice Location: 7500 Barlite Blvd, Suite 106, San Antonio, TX 78224
Phone: 210-616-0882    Fax: 210-692-7833
Dr. Anna Henry Heisser, MD
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Medicare: Medicare Enrolled
Practice Location: 5788 Eckhert Rd, C/o Allergy Clinic, San Antonio, TX 78240
Phone: 210-699-2298    
Kaitlyn Nicole Diaz, PA-C
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Medicare: Medicare Enrolled
Practice Location: 2424 Babcock Rd Ste 301, San Antonio, TX 78229
Phone: 210-538-7678    

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.

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