DR. MARIAH LEIGH MONTGOMERY PHD
NPI 1033984414
Psychologist in Austin, TX

Active since November 16, 2023PECOS Enrolled
4900 MUELLER BLVD, AUSTIN, TX 78723(713) 819-5273 Get Directions Write a Review

NPPES record last updated: November 15, 2024. Verified against the NPPES registry weekly; last sync: November 01, 2026.

Record update history: Nov 15, 2024, Nov 16, 2023 (2 updates tracked since 2023).

About Dr. Mariah Leigh Montgomery Phd NPPES

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

DR. MARIAH LEIGH MONTGOMERY PHD (NPI 1033984414) is an individual psychologist in Austin, Texas, licensed in Texas (39922) and active in the NPI registry since November 2023. She is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1033984414
Entity TypeIndividualFemale
Primary Taxonomy103T00000X
Provider Legal NameDR. MARIAH LEIGH MONTGOMERYCredential: PHD
Location Address4900 MUELLER BLVDAustin, TX 78723-3051
Mailing Address4900 Mueller BlvdAustin, TX 78723-3051 · (713) 819-5273
Sole ProprietorNo
Enumeration DateNovember 16, 2023
Last NPPES UpdateNovember 15, 20242 updates tracked since enumeration
NPPES CertifiedNovember 15, 2024
✔ NPI 1033984414 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPsychologistBehavioral Health & Social Service Providers
Taxonomy Code103T00000X
License✔ Licensed in TX · 39922
Definition
A psychologist is an individual who is licensed to practice psychology which is defined as the observation, description, evaluation, interpretation, and modification of human behavior by the application of psychological principles, methods, and procedures, for the purpose of preventing or eliminating symptomatic, maladaptive, or undesired behavior and of enhancing interpersonal relationships, work and life adjustment, personal effectiveness, behavioral health, and mental health. The practice of psychology includes, but is not limited to, psychological testing and the evaluation or assessment of personal characteristics, such as intelligence, personality, abilities, interests, aptitudes, and neuropsychological functioning; counseling, psychoanalysis, psychotherapy, hypnosis, biofeedback, and behavior analysis and therapy; diagnosis and treatment of mental and emotional disorder or disability, alcoholism and substance abuse, disorders of habit or conduct, as well as of the psychological aspects of physical illness, accident, injury, or disability; and psycheducational evaluation, therapy, remediation, and consultation. Psychological services may be rendered to individuals, families, groups and the public.
4900 MUELLER BLVD, Austin, TX 78723

Other Names 1

Former Name (1)Mariah Montgomery Stickley

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)

Dr. Mariah Leigh Montgomery Phd 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 Mariah Montgomery reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Cardiovascular Disease
3501 MILLS AVE
Austin, TX 78731
  • Reassigned Medicare billing, Texas enrollment
  • 136 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 20

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

Nurse Practitioner (Pediatrics)
4900 MUELLER BLVD
AUSTIN, TX 78723
Pediatrics (Pediatric Cardiology)
4900 MUELLER BLVD
AUSTIN, TX 78723
Nurse Practitioner (Pediatrics)
4900 MUELLER BLVD
AUSTIN, TX 78723
Respiratory Therapist, Registered (Neonatal/Pediatrics)
4900 MUELLER BLVD
AUSTIN, TX 78723
Student in an Organized Health Care Education/Training Program
4900 MUELLER BLVD
AUSTIN, TX 78723
Pediatrics
4900 MUELLER BLVD, SUITE 3S.066C
AUSTIN, TX 78723
Pediatrics
4900 MUELLER BLVD, SUITE 3S.066C
AUSTIN, TX 78723
Pediatrics
4900 MUELLER BLVD, SUITE 3S.066C
AUSTIN, TX 78723

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 Mariah Montgomery's NPI number?

The NPI number for Mariah Montgomery is 1033984414. It was assigned to this individual provider in the NPPES registry on November 16, 2023. The provider is also known as Mariah Montgomery Stickley.

Where is Mariah Montgomery located?

Mariah Montgomery practices at 4900 Mueller Blvd, Austin, TX 78723. The listed phone number is (713) 819-5273.

What is Mariah Montgomery's specialty?

The primary specialty registered for this NPI is Psychologist with taxonomy code 103T00000X.

Is Mariah Montgomery enrolled in Medicare?

Yes. Mariah Montgomery is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Mariah Montgomery's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Mariah Montgomery reassigns Medicare benefits to Tri-County Clinical (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 Mariah Montgomery's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Mariah Montgomery accept?

Health plans from Harbor Health, Moda Health Plan, Inc., Sendero Health Plans, Local Nonprofit and WellPoint list Mariah Montgomery 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 Mariah Montgomery was last updated on November 15, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 23 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.