Kathryn Ruth Shirley, FNP - Medicare Nurse Practitioner in Austin, TX

Kathryn Ruth Shirley, FNP is a medicare enrolled "Nurse Practitioner - Family" in Austin, Texas. She graduated from nursing school in 2013 and has 11 years of diverse experience with area of expertise as Nurse Practitioner. She is a member of the group practice Texas Integrated Medical Specialists, Pllc, Texas Oncology Pa and her current practice location is 12221 Renfert Way Ste 300, Austin, Texas. You can reach out to her office (for appointments etc.) via phone at (512) 873-8900.

Kathryn Ruth Shirley is licensed to practice in Texas (license number AP124445) and she also participates in the medicare program. She accepts medicare assignments (which means she accepts the Medicare-approved amount; you will not be billed for any more than the Medicare deductible and coinsurance) and her NPI Number is 1639500465.

Contact Information

Kathryn Ruth Shirley, FNP
12221 Renfert Way Ste 300,
Austin, TX 78758-5453
(512) 873-8900
(512) 873-8913

Map and Direction




Provider's Profile

Full NameKathryn Ruth Shirley
GenderFemale
SpecialityNurse Practitioner
Experience11 Years
Location12221 Renfert Way Ste 300, Austin, Texas
Accepts Medicare AssignmentsYes. She accepts the Medicare-approved amount; you will not be billed for any more than the Medicare deductible and coinsurance.
  Medical Education and Training:
  • Kathryn Ruth Shirley graduated from nursing school in 2013
  NPI Data:
  • NPI Number: 1639500465
  • Provider Enumeration Date: 12/04/2013
  • Last Update Date: 06/05/2024
  Medicare PECOS Information:
  • PECOS PAC ID: 2668605718
  • Enrollment ID: I20140425001450

Medical Identifiers

Medical identifiers for Kathryn Ruth Shirley such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1639500465NPI-NPPES
332504502MedicaidTX
332504501MedicaidTX

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
363L00000XNurse Practitioner 530719 (Texas)Secondary
363LF0000XNurse Practitioner - Family AP124445 (Texas)Primary
363L00000XNurse Practitioner AP124445 (Texas)Secondary

Group Practice Association

Group Practice NameGroup PECOS PAC IDNo. of Members
Texas Integrated Medical Specialists, Pllc43850138465
Texas Oncology Pa5395658934886

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. Kathryn Ruth Shirley allows following entities to bill medicare on her behalf.
Entity NameTexas Oncology Pa
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1811944101
PECOS PAC ID: 5395658934
Enrollment ID: O20031124000323
Entity NameCentral Texas Medical Specialists, Pllc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1821069014
PECOS PAC ID: 8224273230
Enrollment ID: O20130322000189
Entity NameTexas Integrated Medical Specialists, Pllc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1558080416
PECOS PAC ID: 4385013846
Enrollment ID: O20221206001864

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. Kathryn Ruth Shirley 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
Kathryn Ruth Shirley, FNP
Po Box 911230,
Dallas, TX 75391-1230

Ph: (972) 997-8000
Kathryn Ruth Shirley, FNP
12221 Renfert Way Ste 300,
Austin, TX 78758-5453

Ph: (512) 873-8900

Reviews and Comments


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Ms. Amber Leigh Peoples, APRN
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Medicare: Accepting Medicare Assignments
Practice Location: 1305 W 34th St Ste 400, Austin, TX 78705
Phone: 512-459-6599    Fax: 512-459-8496

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.