Kathryn Shirley, FNP
NPI 1639500465 · Family Nurse Practitioner · Austin, TX
Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Kathryn Shirley, FNP is a Family Nurse Practitioner provider in Austin, TX (NPI 1639500465).
Provider details
- NPI number
- 1639500465
- Entity type
- Individual
- Primary specialty
- Family Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- FNP
- Sex
- Female
- Sole proprietor
- No
- License
- 530719 (TX)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Physician Assistants & Advanced Practice Nursing Providers
Physician Assistants & Advanced Practice Nursing Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
12 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
558 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 212 | $77 |
| Complete Blood Cell Count (red Cells, White Blood Cell, Platelets), Automated Test and Automated Differential White Blood Cell Count85025 | 66 | $8 |
| Blood Test, Comprehensive Group of Blood Chemicals80053 | 61 | $10 |
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 59 | $9 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 36 | $153 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 7 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Anastrozole | 32 | 12 |
| Hydroxyurea | 31 | 12 |
| Apixabanbrand: Eliquis | 26 | — |
| Acyclovir | 25 | — |
| Rivaroxabanbrand: Xarelto | 24 | — |
| Ondansetronbrand: Ondansetron Odt | 11 | — |
| Prednisone | 11 | — |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$2,098 across 41 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2013-12-04
- Last updated
- 2024-06-05
- Certified
- 2024-06-05
Frequently asked questions
- What is Kathryn Shirley's NPI number?
- Kathryn Shirley's National Provider Identifier (NPI) is 1639500465, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Kathryn Shirley's specialty?
- Kathryn Shirley is listed in the NPPES registry with a primary specialty of Family Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Kathryn Shirley located?
- Kathryn Shirley's practice location on file with NPPES is 12221 Renfert Way Ste 300, Austin, TX 78758-5453.
- What is Kathryn Shirley's phone number?
- The practice phone number listed in the NPPES registry for Kathryn Shirley is (512) 873-8900.
- Does Kathryn Shirley accept Medicare?
- Kathryn Shirley is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Kathryn Shirley's NPI active?
- Yes — Kathryn Shirley's NPI (1639500465) is active in the NPPES registry as of the last update on 2024-06-05.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.