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SARAH KATHLEEN LEDDY WALTER MD
NPI 1891224812
Pediatrics - Pediatric Critical Care Medicine in Austin, TX

Active since June 05, 2017PECOS Enrolled
4900 MUELLER BLVD, AUSTIN, TX 78723(512) 324-9999 Get Directions Write a Review

NPPES record last updated: July 7, 2023. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Jul 7, 2023, Jul 13, 2020 (2 updates tracked since 2020).

About Sarah Kathleen Leddy Walter Md NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

SARAH KATHLEEN LEDDY WALTER MD (NPI 1891224812) is an individual pediatric critical care medicine provider in Austin, Texas, licensed in Texas (S6323) and active in the NPI registry since June 2017. She is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1891224812
Entity TypeIndividualFemale
Primary Taxonomy2080P0203X
Provider Legal NameSARAH KATHLEEN LEDDY WALTERCredential: MD
Location Address4900 MUELLER BLVDAustin, TX 78723-3051
Mailing Address4900 Mueller BlvdAustin, TX 78723-3051
Phone(512) 324-9999
Sole ProprietorNo
Enumeration DateJune 5, 2017
Last NPPES UpdateJuly 7, 20232 updates tracked since enumeration
NPPES CertifiedJuly 7, 2023
✔ NPI 1891224812 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPediatrics · Pediatric Critical Care MedicineAllopathic & Osteopathic Physicians
Taxonomy Code2080P0203X
License✔ Licensed in TX · S6323
Definition
A pediatrician expert in advanced life support for children from the term or near-term neonate to the adolescent. This competence extends to the critical care management of life-threatening organ system failure from any cause in both medical and surgical patients and to the support of vital physiological functions. This specialist may have administrative responsibilities for intensive care units and also facilitates patient care among other specialists.
4900 MUELLER BLVD, Austin, TX 78723
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Other Names 1

Former Name (1)Sarah Kathleen Leddy

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Ambetter from Arizona Complete Health, Ambetter from Arkansas Health & Wellness, Ambetter from Louisiana Healthcare Connections and more.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Sarah Kathleen Leddy Walter Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignment

Medicare enrollment records show Sarah Walter reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Dell Children's Medical Group
0.2 mi
Pediatrics
1301 BARBARA JORDAN BLVD STE 200
Austin, TX 78723
  • Reassigned Medicare billing, Texas enrollment
  • Medicare enrollment name: Dell Childrens Medical Group
  • 576 clinicians in this Medicare group
NPI 1326072943 (512) 628-1800

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 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

JENNIFER KRENA
Nurse Practitioner (Pediatrics)
4900 MUELLER BLVD
AUSTIN, TX 78723
Travis County (512) 324-0000
PATRICK EMERSON DAY MD
Pediatrics (Pediatric Cardiology)
4900 MUELLER BLVD
AUSTIN, TX 78723
Travis County (512) 324-0000
RACHEL SCHROER APRN, CPNP-PC/AC
Nurse Practitioner (Pediatrics)
4900 MUELLER BLVD
AUSTIN, TX 78723
Travis County (512) 324-0000
ARTURO VARGAS RRT
Respiratory Therapist, Registered (Neonatal/Pediatrics)
4900 MUELLER BLVD
AUSTIN, TX 78723
Travis County (512) 324-0000
NICOLE R FRIEDMAN
Student in an Organized Health Care Education/Training Program
4900 MUELLER BLVD
AUSTIN, TX 78723
Travis County (512) 324-0000
TANIA EID
Pediatrics
4900 MUELLER BLVD, SUITE 3S.066C
AUSTIN, TX 78723
Travis County (512) 324-0165
RICHARD THOMPSON
Pediatrics
4900 MUELLER BLVD, SUITE 3S.066C
AUSTIN, TX 78723
Travis County (512) 324-0165
DR. KATHRYN BRAND M.D.
Pediatrics
4900 MUELLER BLVD, SUITE 3S.066C
AUSTIN, TX 78723
Travis County (512) 324-0165

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 Sarah Walter's NPI number?

The NPI number for Sarah Walter is 1891224812. It was assigned to this individual provider in the NPPES registry on June 5, 2017. The provider is also known as Sarah Kathleen Leddy.

Where is Sarah Walter located?

Sarah Walter practices at 4900 Mueller Blvd, Austin, TX 78723. The listed phone number is (512) 324-9999.

What is Sarah Walter's specialty?

The primary specialty registered for this NPI is Pediatrics, specializing in Pediatric Critical Care Medicine, with taxonomy code 2080P0203X.

Is Sarah Walter enrolled in Medicare?

Yes. Sarah Walter is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Sarah Walter's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Sarah Walter reassigns Medicare benefits to Dell Children's Medical Group (Austin, TX). 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 Sarah Walter's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Sarah Walter 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 3 other insurers list Sarah Walter 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 Sarah Walter was last updated on July 7, 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.