GRADY MCMILLEN
NPI 1528839974
Nurse Practitioner - Psychiatric/Mental Health in Knoxville, TN
About Grady Mcmillen NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
GRADY MCMILLEN (NPI 1528839974) is an individual psychiatric/mental health provider in Knoxville, Tennessee, licensed in Tennessee (38010) and active in the NPI registry since January 2024. He is enrolled in Medicare PECOS and maintains 2 additional practice locations.
NPPES Registry Identity
Specialties & Licenses 2
Secondary Practice Locations 2
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Grady Mcmillen is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignment
Medicare enrollment records show Grady Mcmillen reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Knoxville, TN 37917
- Reassigned Medicare billing, Tennessee enrollment
- 134 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 37917 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.
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 Grady Mcmillen's NPI number?
The NPI number for Grady Mcmillen is 1528839974. It was assigned to this individual provider in the NPPES registry on January 15, 2024.
Where is Grady Mcmillen located?
Grady Mcmillen practices at 1515 Saint Mary St, Knoxville, TN 37917. The listed phone number is (865) 637-9711.
What is Grady Mcmillen's specialty?
The primary specialty registered for this NPI is Nurse Practitioner, specializing in Psychiatric/Mental Health, with taxonomy code 363LP0808X.
Is Grady Mcmillen enrolled in Medicare?
Yes. Grady Mcmillen is registered in the Medicare PECOS enrollment system.
Which organization bills Medicare for Grady Mcmillen's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Grady Mcmillen reassigns Medicare benefits to Helen Ross Mcnabb Center (Knoxville, 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 Grady Mcmillen's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Grady Mcmillen accept?
Health plans from BlueCross BlueShield of Tennessee, Cigna Healthcare and Oscar Insurance Company list Grady Mcmillen 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.
When was this NPI record last updated?
The NPPES record for Grady Mcmillen was last updated on April 29, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 18 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.
# Grady Mcmillen · NPI 1528839974
Psychiatric/Mental Health physician in Knoxville, Tennessee. Individual provider, active in the CMS NPPES registry since January 15, 2024.
## Identity
- **NPI:** 1528839974 (Entity type: Individual)
- **Enumerated:** January 15, 2024
- **Primary specialty:** Nurse Practitioner - Psychiatric/Mental Health · taxonomy 363LP0808X
- **State license:** 38010 (Tennessee)
- **Sole proprietor:** No
## Practice location
- **Address:** 1515 SAINT MARY ST, Knoxville, TN 37917-4503
- **Phone:** (865) 637-9711
## 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:** Helen Ross Mcnabb Center (NPI 1659330686, Knoxville, TN), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** April 29, 2025
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Source: [NPI Profile](https://npiprofile.com/npi/1528839974) · Data from the CMS NPPES public registry.