John K Tsai, MD - Medicare Gastroenterology in Austin, TX

John K Tsai, MD is a medicare enrolled "Internal Medicine - Gastroenterology" physician in Austin, Texas. He went to Northwestern University Feinberg Medical School and graduated in 2001 and has 23 years of diverse experience with area of expertise as Gastroenterology. He is a member of the group practice Austin Gastroenterology Pllc and his current practice location is 4310 James Casey St, Ste 4a, Austin, Texas. You can reach out to his office (for appointments etc.) via phone at (512) 448-4588.

John K Tsai is licensed to practice in Texas (license number R1466) 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 1437321791.

Contact Information

John K Tsai, MD
4310 James Casey St, Ste 4a,
Austin, TX 78745-1251
(512) 448-4588
(512) 445-4511

Map and Direction




Physician's Profile

Full NameJohn K Tsai
GenderMale
SpecialityGastroenterology
Experience23 Years
Location4310 James Casey St, Austin, 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:
  • John K Tsai attended and graduated from Northwestern University Feinberg Medical School in 2001
  NPI Data:
  • NPI Number: 1437321791
  • Provider Enumeration Date: 03/27/2008
  • Last Update Date: 02/28/2017
  Medicare PECOS Information:
  • PECOS PAC ID: 8527138536
  • Enrollment ID: I20170228000241

Medical Identifiers

Medical identifiers for John K Tsai such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1437321791NPI-NPPES

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207RG0100XInternal Medicine - Gastroenterology 38154 (Arizona)Secondary
207RG0100XInternal Medicine - Gastroenterology R1466 (Texas)Primary

Medical Facilities Affiliation

Facility NameLocationFacility Type
St David's South Austin Medical CenterAustin, TXHospital

Group Practice Association

Group Practice NameGroup PECOS PAC IDNo. of Members
Austin Gastroenterology Pllc973917495474

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. John K Tsai allows following entities to bill medicare on his behalf.
Entity NameAustin Gastroenterology Pllc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1316998016
PECOS PAC ID: 9739174954
Enrollment ID: O20040417000145

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. John K Tsai 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
John K Tsai, MD
Po Box 10597,
Austin, TX 78766-1597

Ph: (512) 485-5889
John K Tsai, MD
4310 James Casey St, Ste 4a,
Austin, TX 78745-1251

Ph: (512) 448-4588

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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