PETER JOSEPH WALKER
NPI 1407646433
Nurse Practitioner - Psychiatric/Mental Health in Nashville, TN
About Peter Joseph Walker NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
PETER JOSEPH WALKER (NPI 1407646433) is an individual psychiatric/mental health provider in Nashville, Tennessee, licensed in New York (F408395-01) and active in the NPI registry since May 2025. He is enrolled in Medicare PECOS and is a graduate of Other (2025).
NPPES Registry Identity
Specialties & Licenses 2
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Peter Joseph Walker is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignment
Medicare enrollment records show Peter Walker reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
New York, NY 10003
- Reassigned Medicare billing, New York enrollment
- 62 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.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 37240 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 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
NASHVILLE, TN 37240
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 Peter Walker's NPI number?
The NPI number for Peter Walker is 1407646433. It was assigned to this individual provider in the NPPES registry on May 12, 2025.
Where is Peter Walker located?
Peter Walker practices at 461 21st Ave S, Nashville, TN 37240. The listed phone number is (615) 322-4400.
What is Peter Walker's specialty?
The primary specialty registered for this NPI is Nurse Practitioner, specializing in Psychiatric/Mental Health, with taxonomy code 363LP0808X.
Is Peter Walker enrolled in Medicare?
Yes. Peter Walker is registered in the Medicare PECOS enrollment system.
Which organization bills Medicare for Peter Walker's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Peter Walker reassigns Medicare benefits to Neighborhood Psychiatric Associates Of Manhattan PLLC (New York, NY). 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 Peter Walker's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
When was this NPI record last updated?
The NPPES record for Peter Walker was last updated on July 28, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 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.
# Peter Joseph Walker · NPI 1407646433
Psychiatric/Mental Health physician in Nashville, Tennessee. Individual provider, active in the CMS NPPES registry since May 12, 2025.
## Identity
- **NPI:** 1407646433 (Entity type: Individual)
- **Enumerated:** May 12, 2025
- **Primary specialty:** Nurse Practitioner - Psychiatric/Mental Health · taxonomy 363LP0808X
- **State license:** F408395-01 (New York)
- **Sole proprietor:** No
## Practice location
- **Address:** 461 21ST AVE S, Nashville, TN 37240-1104
- **Phone:** (615) 322-4400
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** Neighborhood Psychiatric Associates Of Manhattan PLLC (NPI 1831576735, New York, NY), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2025
## Record status
- **NPPES last updated:** July 28, 2026
---
Source: [NPI Profile](https://npiprofile.com/npi/1407646433) · Data from the CMS NPPES public registry.