MS. MARY WALKER MS
NPI 1427371152
Counselor - Mental Health in Terre Haute, IN
About Ms. Mary Walker Ms NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MS. MARY WALKER MS (NPI 1427371152) is an individual mental health provider in Terre Haute, Indiana, licensed in Indiana (39002285A) and active in the NPI registry since March 2010. She is enrolled in Medicare PECOS and is a graduate of Other (2008).
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 and accepts Medicare assignment
Ms. Mary Walker Ms 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 Mary Walker reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Terre Haute, IN 47803
- Reassigned Medicare billing, Indiana enrollment
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
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 1427371152. It was assigned to this individual provider in the NPPES registry on March 9, 2010. The provider is also known as Mary Walker Ms Lmhc.
Where is Mary Walker located?
Mary Walker practices at 2901 Ohio Blvd Ste 114-6, Terre Haute, IN 47803. The listed phone number is (317) 730-0821.
What is Mary Walker's specialty?
The primary specialty registered for this NPI is Counselor, specializing in Mental Health, with taxonomy code 101YM0800X.
Is Mary Walker enrolled in Medicare?
Yes. Mary 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 Mary Walker's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Mary Walker reassigns Medicare benefits to Envision Hp LLC (Terre Haute, IN). 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 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 Health, Ambetter from Buckeye Health Plan, Ambetter from Meridian, CareSource and Oscar Health Maintenance Organization of Florida 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 January 27, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 8 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.
# Ms. Mary Walker, MS · NPI 1427371152
Mental Health provider in Terre Haute, Indiana. Individual provider, active in the CMS NPPES registry since March 9, 2010.
## Identity
- **NPI:** 1427371152 (Entity type: Individual)
- **Enumerated:** March 9, 2010
- **Primary specialty:** Counselor - Mental Health · taxonomy 101YM0800X
- **State license:** 39002285A (Indiana)
- **Sole proprietor:** No
## Practice location
- **Address:** 2901 OHIO BLVD STE 114-6, Terre Haute, IN 47803-2239
- **Phone:** (317) 730-0821
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment
- **Bills Medicare through:** Envision Hp LLC (NPI 1871205161, Terre Haute, IN), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2008
## Record status
- **NPPES last updated:** January 27, 2026
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Source: [NPI Profile](https://npiprofile.com/npi/1427371152) · Data from the CMS NPPES public registry.