Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Kathryn Ruth Shirley, FNP

Family Nurse Practitioner in Austin, TX · enumerated 2013 · practices at Oncology Pharmacy Services, Inc.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1639500465

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Registry record

Entity type Individual (Type 1)

Name Kathryn Ruth Shirley

Credential FNP

Sex Female

Practice address 12221 Renfert Way Ste 300, Austin, TX, 78758

Phone (512) 873-8900

Fax (512) 873-8913

Enumeration date Dec 4, 2013

Last updated in NPPES Jun 5, 2024

Taxonomy & licenses

363L00000X Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License 530719 (TX) Secondary

363LF0000X Family Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License AP124445 (TX) Primary

363L00000X Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License AP124445 (TX) Secondary

FNP · Family Nurse Practitioner: A nurse practitioner certified in family practice across the lifespan. About the FNP credential

Other identifiers

Identifier	Type	State	Issuer
332504502	Medicaid	TX	-
332504501	Medicaid	TX	-

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.

Read the full guide → Validate an NPI →

Frequently asked questions

Where does Kathryn Shirley practice?

The practice location on file with NPPES is in Austin, TX. Providers can have multiple locations; NPPES lists the primary practice address.

What is the NPI number for Kathryn Shirley?

The National Provider Identifier (NPI) for Kathryn Shirley is 1639500465, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

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Shubhada Shrikhande Hematology & Oncology Physician · Austin, TX NPI 1982661674 Laura Davis Surgical Physician Assistant · Austin, TX NPI 1780691063 Allison Gorrebeeck Hematology & Oncology Physician · Austin, TX NPI 1467548628 Helen Eshed Gynecologic Oncology Physician · Austin, TX NPI 1215195516 Miguel Albino Medical Oncology Physician · Austin, TX NPI 1205060746 Larisa Gallo Physician Assistant · Austin, TX NPI 1013256833 Oncology Pharmacy Services, Inc Community/Retail Pharmacy · Austin, TX NPI 1710491295 Evelina Kaminski Family Nurse Practitioner · Austin, TX NPI 1699277756

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2024-06-05.