MARY ELIZABETH WALKER RN
NPI 1104172808
Nurse Anesthetist, Certified Registered in Houston, TX
About Mary Elizabeth Walker Rn NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MARY ELIZABETH WALKER RN (NPI 1104172808) is an individual nurse anesthetist, certified registered in Houston, Texas, licensed in Texas (625752) and active in the NPI registry since July 2012. She is affiliated with Christus Southeast Texas- St Elizabeth, maintains 4 additional practice locations, and is a graduate of Other (2010).
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Locations 4
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
Mary Elizabeth Walker Rn 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
8Medicare enrollment records show Mary Walker reassigns Medicare billing to 8 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Houston, TX 77030
- Reassigned Medicare billing, Texas enrollment
- 2,554 clinicians in this Medicare group
Houston, TX 77042
- Reassigned Medicare billing, Texas enrollment
- Medicare enrollment name: U S Anesthesia Partners Of Texas, PA
- 3,804 clinicians in this Medicare group
Houston, TX 77065
- Reassigned Medicare billing, Texas enrollment
- 964 clinicians in this Medicare group
Webster, TX 77598
- Reassigned Medicare billing, Texas enrollment
- 543 clinicians in this Medicare group
Galveston, TX 77555
- Reassigned Medicare billing, Texas enrollment
- 2,222 clinicians in this Medicare group
Fort Worth, TX 76109
- Reassigned Medicare billing, Texas enrollment
- 1,612 clinicians in this Medicare group
Fort Worth, TX 76104
- Reassigned Medicare billing, Texas enrollment
- 509 clinicians in this Medicare group
Evansville, IN 47712
- Reassigned Medicare billing, Indiana enrollment
- 717 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.
Areas of Expertise CMS Part B claims 2
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Hospital Affiliations CMS Care Compare 2
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Christus Southeast Texas- St Elizabeth
Acute Care Hospitals · Beaumont, TXSierra Medical Center
Acute Care Hospitals · El Paso, TXPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 77030 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Medicare Quality Performance CMS QPP · MIPS
Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.
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.
HOUSTON, TX 77030
HOUSTON, TX 77030
HOUSTON, TX 77030
HOUSTON, TX 77030
HOUSTON, TX 77030
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 1104172808. It was assigned to this individual provider in the NPPES registry on July 31, 2012.
Where is Mary Walker located?
Mary Walker practices at 6720 Bertner Ave Ste O-520, Houston, TX 77030. The listed phone number is (713) 798-1750.
What is Mary Walker's specialty?
The primary specialty registered for this NPI is Nurse Anesthetist, Certified Registered with taxonomy code 367500000X.
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 organizations bill Medicare for Mary Walker's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Mary Walker reassigns Medicare benefits to 8 organizations: Baylor College Of Medicine (Houston, TX), U. S. Anesthesia Partners Of Texas, P.A., (Houston, TX), Bhs Physicians Network, Inc (Houston, TX), Texans Anesthesia Associates PLLC (Webster, TX), Utmb Faculty Group Practice (Galveston, TX) and 3 more organizations, listed in the Medicare section above. 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 Baylor Scott and White Health Plan, Blue Cross and Blue Shield of Texas, CareSource, Imperial Insurance Companies, Inc. and Oscar Insurance Company 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.
Is Mary Walker affiliated with any hospitals?
According to CMS data, Mary Walker is affiliated with Christus Southeast Texas- St Elizabeth and Sierra Medical Center.
When was this NPI record last updated?
The NPPES record for Mary Walker was last updated on October 25, 2023. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 years 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 Elizabeth Walker, RN · NPI 1104172808
Nurse Anesthetist, Certified Registered physician in Houston, Texas. Individual provider, active in the CMS NPPES registry since July 31, 2012.
## Identity
- **NPI:** 1104172808 (Entity type: Individual)
- **Enumerated:** July 31, 2012
- **Primary specialty:** Nurse Anesthetist, Certified Registered · taxonomy 367500000X
- **State license:** 625752 (Texas)
- **Sole proprietor:** No
## Practice location
- **Address:** 6720 BERTNER AVE STE O-520, Houston, TX 77030-2604
- **Phone:** (713) 798-1750 · **Fax:** (713) 798-4693
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Bills Medicare through:** 8 organizations under Medicare reassignment (form CMS-855R): Baylor College Of Medicine (NPI 1881026664, Houston, TX); U. S. Anesthesia Partners Of Texas, P.A., (NPI 1548208564, Houston, TX); Bhs Physicians Network, Inc (NPI 1548613128, Houston, TX); Texans Anesthesia Associates PLLC (NPI 1275733982, Webster, TX); Utmb Faculty Group Practice (NPI 1942241146, Galveston, TX); and 3 more · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2010
## Record status
- **NPPES last updated:** October 25, 2023
---
Source: [NPI Profile](https://npiprofile.com/npi/1104172808) · Data from the CMS NPPES public registry.