Robert A Zajac, MD - Medicare Infectious Disease in San Antonio, TX

Robert A Zajac, MD is a medicare enrolled "Internal Medicine - Infectious Disease" physician in San Antonio, Texas. He went to Louisiana State University School Of Medicine In New Orleans and graduated in 1981 and has 43 years of diverse experience with area of expertise as Infectious Disease. He is a member of the group practice Robert A Zajac Md Pa and his current practice location is 150 E Sonterra Blvd, Suite 170, San Antonio, Texas. You can reach out to his office (for appointments etc.) via phone at (210) 481-2800.

Robert A Zajac is licensed to practice in Texas (license number H3973) 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 1013907963.

Contact Information

Robert A Zajac, MD
150 E Sonterra Blvd, Suite 170,
San Antonio, TX 78258-4098
(210) 481-2800
(210) 481-2834

Map and Direction




Physician's Profile

Full NameRobert A Zajac
GenderMale
SpecialityInfectious Disease
Experience43 Years
Location150 E Sonterra Blvd, 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:
  • Robert A Zajac attended and graduated from Louisiana State University School Of Medicine In New Orleans in 1981
  NPI Data:
  • NPI Number: 1013907963
  • Provider Enumeration Date: 10/24/2005
  • Last Update Date: 08/08/2024
  Medicare PECOS Information:
  • PECOS PAC ID: 6103829726
  • Enrollment ID: I20060821000053

Medical Identifiers

Medical identifiers for Robert A Zajac such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1013907963NPI-NPPES
131416308MedicaidTX

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207RI0200XInternal Medicine - Infectious Disease H3973 (Texas)Primary

Medical Facilities Affiliation

Facility NameLocationFacility Type
Theracare Home HealthSan antonio, TXHome health agency
Texas Home Health Skilled ServicesSan antonio, TXHome health agency
Christus HomecareNew braunfels, TXHome health agency
Methodist Hospital Stone OakSan antonio, TXHospital
Baptist Medical CenterSan antonio, TXHospital
Guadalupe Regional Medical CenterSeguin, TXHospital

Group Practice Association

Group Practice NameGroup PECOS PAC IDNo. of Members
Robert A Zajac Md Pa62048314985

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. Robert A Zajac allows following entities to bill medicare on his behalf.
Entity NameRobert A Zajac Md Pa
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1255357653
PECOS PAC ID: 6204831498
Enrollment ID: O20060921000404

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. Robert A Zajac 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
Robert A Zajac, MD
Po Box 1346,
San Antonio, TX 78295-1346

Ph: (210) 558-6288
Robert A Zajac, MD
150 E Sonterra Blvd, Suite 170,
San Antonio, TX 78258-4098

Ph: (210) 481-2800

Reviews and Comments


Internal Medicine Doctors in San Antonio, TX

Dr. Dennis Anthony Ruff, M.D.
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Zarema J Singson, M.D.
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Dr. Jonathan Edward Slovik, MD
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Mr. Paul Joseph Fanucchi, NP
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Medicare: Not Enrolled in Medicare
Practice Location: Marianist Residence, 520 Fondham, San Antonio, TX 78228
Phone: 210-434-4157    Fax: 210-433-6005
Socrates B Aramburu, MD
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Medicare: Accepting Medicare Assignments
Practice Location: 1100 Mccullough Ave, Suite 300, San Antonio, TX 78212
Phone: 210-271-3204    Fax: 210-222-2761

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.