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DR. ALEXANDRA LEIGH CLARK PHD
NPI 1831755537
Clinical Neuropsychologist in Austin, TX

Active since May 17, 2019PECOS EnrolledAccepts Medicare Assignment
711 W 38TH ST STE F2, AUSTIN, TX 78705(512) 637-5841(512) 637-5997 Get Directions Write a Review

NPPES record last updated: August 27, 2025. Verified against the NPPES registry weekly; last sync: October 18, 2026.

About Dr. Alexandra Leigh Clark Phd NPPES

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

DR. ALEXANDRA LEIGH CLARK PHD (NPI 1831755537) is an individual clinical neuropsychologist in Austin, Texas, licensed in Texas (39726) and active in the NPI registry since May 2019. She is enrolled in Medicare PECOS and is a graduate of University Of California, San Diego School Of Medicine (2019).

NPPES Registry Identity

NPI1831755537
Entity TypeIndividualFemale
Primary Taxonomy103G00000X
Provider Legal NameDR. ALEXANDRA LEIGH CLARKCredential: PHD
Location Address711 W 38TH ST STE F2Austin, TX 78705-1133
Mailing Address711 W 38th St Ste F2Austin, TX 78705-1133 · (512) 637-5841 · Fax (512) 637-5997
Phone(512) 637-5841
Fax(512) 637-5997
Sole ProprietorNo
Medical School CMSUniversity Of California, San Diego School Of MedicineGraduated 2019
Enumeration DateMay 17, 2019
Last NPPES UpdateAugust 27, 2025
NPPES CertifiedAugust 27, 2025
✔ NPI 1831755537 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyClinical NeuropsychologistBehavioral Health & Social Service Providers
Taxonomy Code103G00000X
License✔ Licensed in TX · 39726
Definition
A clinical psychologist who applies principles of assessment and intervention based upon the scientific study of human behavior as it relates to normal and abnormal functioning of the central nervous system. The specialty is dedicated to enhancing the understanding of brain-behavior relationships and the application of such knowledge to human problems.
711 W 38TH ST STE F2, Austin, TX 78705
Open in Google Maps ↗

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

Dr. Alexandra Leigh Clark Phd 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.

PECOS PAC ID5799148433
PECOS Enrollment IDI20230829002849
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 Alexandra Clark reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Atx Neuropsychology PLLC
Same address
Clinical Neuropsychologist
711 W 38TH ST, BLDG F2
Austin, TX 78705
  • Reassigned Medicare billing, Texas enrollment
  • 3 clinicians in this Medicare group
NPI 1871667808 (512) 637-5841

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 5

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.

Administration of psychological or neuropsychological test by technician, each additional 30 minutes 96139
This service involves a technician administering additional psychological or neuropsychological testing. Each session lasts for an extra 30 minutes. These tests assess cognitive abilities, such as memory, attention, and problem-solving skills, to aid in diagnosing or monitoring mental health conditions.
193 services28 patients
Evaluation of neuropsychological test, first hour 96132
An evaluation of neuropsychological tests is a process to assess your brain's function. It involves tasks designed to measure cognitive abilities such as memory, attention, problem-solving, and language skills. The first hour involves initial testing and observation.
57 services30 patients
Evaluation of neuropsychological test, each additional hour 96133
This service involves further evaluation of your neuropsychological test results beyond the initial hour. It helps to understand your cognitive functioning better, focusing on areas like memory, attention, and problem-solving skills.
43 services25 patients
Administration of psychological or neuropsychological test by technician, first 30 minutes 96138
This procedure involves a trained technician administering a psychological or neuropsychological test. It's a process that assesses your mental function and behavior. The initial session will last 30 minutes. The aim is to understand your cognitive abilities better.
29 services28 patients
Exam of neurobehavioral status, first hour 96116
An exam of neurobehavioral status is a medical procedure that evaluates your brain's functions. This includes assessing your cognitive abilities, emotional responses, and behavioral patterns. The first hour of the exam is typically dedicated to this initial evaluation.
26 services26 patients

Other Providers at the Same Location NPPES

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

DR. DOUGLAS GREGORY ALLEN PHD
Clinical Neuropsychologist
711 W 38TH ST STE F2
AUSTIN, TX 78705
Travis County (512) 637-5841

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 Alexandra Clark's NPI number?

The NPI number for Alexandra Clark is 1831755537. It was assigned to this individual provider in the NPPES registry on May 17, 2019.

Where is Alexandra Clark located?

Alexandra Clark practices at 711 W 38th St Ste F2, Austin, TX 78705. The listed phone number is (512) 637-5841.

What is Alexandra Clark's specialty?

The primary specialty registered for this NPI is Clinical Neuropsychologist with taxonomy code 103G00000X.

Is Alexandra Clark enrolled in Medicare?

Yes. Alexandra Clark 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 Alexandra Clark's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Alexandra Clark reassigns Medicare benefits to Atx Neuropsychology PLLC (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 Alexandra Clark's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for Alexandra Clark was last updated on August 27, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 13 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.