MRS. KEISHA WAYNETTE MASON AGACNP
NPI 1265396436
Nurse Practitioner - Acute Care in Nashville, TN
About Mrs. Keisha Waynette Mason Agacnp NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MRS. KEISHA WAYNETTE MASON AGACNP (NPI 1265396436) is an individual acute care provider in Nashville, Tennessee, licensed in Tennessee (40406) and active in the NPI registry since December 2025. She is enrolled in Medicare PECOS, is affiliated with Ascension Saint Thomas Hospital, and is a graduate of Other (2025).
NPPES Registry Identity
Specialties & Licenses
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
Mrs. Keisha Waynette Mason Agacnp 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 Reassignments
2Medicare enrollment records show Keisha Mason reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Goodlettsville, TN 37072
- Reassigned Medicare billing, Tennessee enrollment
- 734 clinicians in this Medicare group
Goodlettsville, TN 37072
- Reassigned Medicare billing, Tennessee enrollment
- 317 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.
Hospital Affiliations CMS Care Compare
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Ascension Saint Thomas Hospital
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 15
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
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 Keisha Mason's NPI number?
The NPI number for Keisha Mason is 1265396436. It was assigned to this individual provider in the NPPES registry on December 12, 2025.
Where is Keisha Mason located?
Keisha Mason practices at 300 20th Ave N Ste G4, Nashville, TN 37203. The listed phone number is (615) 284-5098.
What is Keisha Mason's specialty?
The primary specialty registered for this NPI is Nurse Practitioner, specializing in Acute Care, with taxonomy code 363LA2100X.
Is Keisha Mason enrolled in Medicare?
Yes. Keisha Mason 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 organizations bill Medicare for Keisha Mason's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Keisha Mason reassigns Medicare benefits to 2 organizations: Advanced Diagnostic Imaging, PC (Goodlettsville, TN) and Advanced Specialists, PC (Goodlettsville, TN). Each 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 Keisha Mason's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Keisha Mason accept?
Health plans from Ambetter Health, Ambetter from Arkansas Health & Wellness, Ambetter of Alabama, Ambetter of North Carolina and Ambetter of Tennessee and 4 other insurers list Keisha Mason 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 Keisha Mason affiliated with any hospitals?
According to CMS data, Keisha Mason is affiliated with Ascension Saint Thomas Hospital.
When was this NPI record last updated?
The NPPES record for Keisha Mason was last updated on January 16, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 9 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.
# Mrs. Keisha Waynette Mason, AGACNP · NPI 1265396436
Acute Care physician in Nashville, Tennessee. Individual provider, active in the CMS NPPES registry since December 12, 2025.
## Identity
- **NPI:** 1265396436 (Entity type: Individual)
- **Enumerated:** December 12, 2025
- **Primary specialty:** Nurse Practitioner - Acute Care · taxonomy 363LA2100X
- **State license:** 40406 (Tennessee)
- **Sole proprietor:** No
## Practice location
- **Address:** 300 20TH AVE N STE G4, Nashville, TN 37203-2244
- **Phone:** (615) 284-5098 · **Fax:** (615) 284-5385
## 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:** 2 organizations under Medicare reassignment (form CMS-855R): Advanced Diagnostic Imaging, PC (NPI 1093741464, Goodlettsville, TN); Advanced Specialists, PC (NPI 1649133463, Goodlettsville, TN) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2025
## Record status
- **NPPES last updated:** January 16, 2026
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Source: [NPI Profile](https://npiprofile.com/npi/1265396436) · Data from the CMS NPPES public registry.