MARY A WALKER LPC
NPI 1326407644
Counselor - Professional in Katy, TX
About Mary A Walker Lpc NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MARY A WALKER LPC (NPI 1326407644) is an individual professional provider in Katy, Texas, licensed in Texas (71329) and active in the NPI registry since February 2016. She is enrolled in Medicare PECOS and is a graduate of Other (2013).
NPPES Registry Identity
Specialties & Licenses
Other Names 1
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)
Mary A Walker Lpc is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignments
2Medicare enrollment records show Mary Walker reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Katy, TX 77494
- Reassigned Medicare billing, Texas enrollment
- 493 clinicians in this Medicare group
Round Rock, TX 78664
- Reassigned Medicare billing, Texas enrollment
- 362 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.
Other Providers at the Same Location NPPES 16
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
KATY, TX 77494
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 Mary Walker's NPI number?
The NPI number for Mary Walker is 1326407644. It was assigned to this individual provider in the NPPES registry on February 15, 2016. The provider is also known as Maryanne Walker Lpc.
Where is Mary Walker located?
Mary Walker practices at 602 W Grand Pkwy S, Katy, TX 77494. The listed phone number is (855) 417-2486.
What is Mary Walker's specialty?
The primary specialty registered for this NPI is Counselor, specializing in Professional, with taxonomy code 101YP2500X.
Is Mary Walker enrolled in Medicare?
Yes. Mary Walker is registered in the Medicare PECOS enrollment system.
Which organizations bill Medicare for Mary Walker's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Mary Walker reassigns Medicare benefits to 2 organizations: Minuteclinic Diagnostic Of Texas PLLC (Katy, TX) and Minuteclinic Telehealth Services Of Texas Association (Round Rock, TX). 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 Mary Walker's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Mary Walker accept?
Health plans from Ambetter from Arizona Complete Health, Ambetter from Arkansas Health & Wellness, Ambetter from Louisiana Healthcare Connections, Ambetter from Superior HealthPlan and Ambetter of Oklahoma and 1 other insurer list Mary 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.
When was this NPI record last updated?
The NPPES record for Mary Walker was last updated on July 21, 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.
# Mary A Walker, LPC · NPI 1326407644
Professional provider in Katy, Texas. Individual provider, active in the CMS NPPES registry since February 15, 2016.
## Identity
- **NPI:** 1326407644 (Entity type: Individual)
- **Enumerated:** February 15, 2016
- **Primary specialty:** Counselor - Professional · taxonomy 101YP2500X
- **State license:** 71329 (Texas)
- **Sole proprietor:** Yes
## Practice location
- **Address:** 602 W GRAND PKWY S, Katy, TX 77494-8328
- **Phone:** (855) 417-2486
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment
- **Bills Medicare through:** 2 organizations under Medicare reassignment (form CMS-855R): Minuteclinic Diagnostic Of Texas PLLC (NPI 1740898188, Katy, TX); Minuteclinic Telehealth Services Of Texas Association (NPI 1922564301, Round Rock, TX) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2013
## Record status
- **NPPES last updated:** July 21, 2026
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Source: [NPI Profile](https://npiprofile.com/npi/1326407644) · Data from the CMS NPPES public registry.