CATHERINE WALKER
NPI 1255749560
Nurse Practitioner - Women's Health in Nashville, TN
About Catherine Walker NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
CATHERINE WALKER (NPI 1255749560) is an individual women's health provider in Nashville, Tennessee, licensed in Tennessee (CAM1-0438-5836) and active in the NPI registry since July 2014. She is enrolled in Medicare PECOS, is affiliated with Tristar Centennial Medical Center, and is a graduate of Vanderbilt University School Of Medicine (2014).
NPPES Registry Identity
Specialties & Licenses 4
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Catherine Walker is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignment
Medicare enrollment records show Catherine Walker reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Nashville, TN 37203
- Reassigned Medicare billing, Tennessee enrollment
- 6 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Areas of Expertise CMS Part B claims
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Hospital Affiliations CMS Care Compare
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Tristar Centennial Medical Center
Acute Care Hospitals · Nashville, TNPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 37203 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Other Providers at the Same Location NPPES 6
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
NASHVILLE, TN 37203
NASHVILLE, TN 37203
NASHVILLE, TN 37203
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is Catherine Walker's NPI number?
The NPI number for Catherine Walker is 1255749560. It was assigned to this individual provider in the NPPES registry on July 30, 2014.
Where is Catherine Walker located?
Catherine Walker practices at 330 23rd Ave N Ste 600, Nashville, TN 37203. The listed phone number is (615) 340-4640.
What is Catherine Walker's specialty?
The primary specialty registered for this NPI is Nurse Practitioner, specializing in Women's Health, with taxonomy code 363LW0102X.
Is Catherine Walker enrolled in Medicare?
Yes. Catherine Walker is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organization bills Medicare for Catherine Walker's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Catherine Walker reassigns Medicare benefits to Tristar Gynecology Oncology, LLC (Nashville, TN). The reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Catherine Walker's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Catherine Walker accept?
Health plans from Alliant Health Plans, Inc., BlueCross BlueShield of Tennessee and Oscar Insurance Company list Catherine Walker as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.
Is Catherine Walker affiliated with any hospitals?
According to CMS data, Catherine Walker is affiliated with Tristar Centennial Medical Center.
When was this NPI record last updated?
The NPPES record for Catherine Walker was last updated on February 25, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 19 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.
# Catherine Walker · NPI 1255749560
Women's Health physician in Nashville, Tennessee. Individual provider, active in the CMS NPPES registry since July 30, 2014.
## Identity
- **NPI:** 1255749560 (Entity type: Individual)
- **Enumerated:** July 30, 2014
- **Primary specialty:** Nurse Practitioner - Women's Health · taxonomy 363LW0102X
- **State license:** CAM1-0438-5836 (Tennessee)
- **Sole proprietor:** No
## Practice location
- **Address:** 330 23RD AVE N STE 600, Nashville, TN 37203-1661
- **Phone:** (615) 340-4640 · **Fax:** (615) 342-4642
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** Tristar Gynecology Oncology, LLC (NPI 1003152208, Nashville, TN), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Vanderbilt University School Of Medicine, class of 2014
## Record status
- **NPPES last updated:** February 25, 2025
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Source: [NPI Profile](https://npiprofile.com/npi/1255749560) · Data from the CMS NPPES public registry.