1. Home
  2. Directory
  3. Mississippi
  4. Tupelo
  5. Clinical Neuropsychologist
  6. NPI Profile

WILLIAM BRIAN THOMAS PSY.D.
NPI 1720022973
Clinical Neuropsychologist in Tupelo, MS

Active since June 16, 2006PECOS EnrolledAccepts Medicare Assignment
93.1/100
CMS Quality Rating
144 S THOMAS ST STE 104A, TUPELO, MS 38801(662) 231-8916(662) 259-8479 Get Directions Write a Review

NPPES record last updated: July 19, 2017. Verified against the NPPES registry weekly; last sync: October 18, 2026.

About William Brian Thomas Psy.d. NPPES

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

WILLIAM BRIAN THOMAS PSY.D. (NPI 1720022973) is an individual clinical neuropsychologist in Tupelo, Mississippi, licensed in Mississippi (40015) and active in the NPI registry since June 2006. He is enrolled in Medicare PECOS and is a graduate of Other (1994).

NPPES Registry Identity

NPI1720022973
Entity TypeIndividualMale
Primary Taxonomy103G00000X
Provider Legal NameWILLIAM BRIAN THOMASCredential: PSY.D.
Location Address144 S THOMAS ST STE 104ATupelo, MS 38801-5337
Mailing Address144 S Thomas St, Ste 104aTupelo, MS 38801 · (662) 231-8916 · Fax (662) 259-8479
Phone(662) 231-8916
Fax(662) 259-8479
Sole ProprietorNo
Medical School CMSOtherGraduated 1994
Enumeration DateJune 16, 2006
Last NPPES UpdateJuly 19, 2017
✔ NPI 1720022973 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 MS · 40015
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.
144 S THOMAS ST STE 104A, Tupelo, MS 38801
Open in Google Maps ↗

Other Identifiers 3

Medicare UPINP36688MS
Medicaid2476081MS
Medicare ID-Type Unspecified680000257MS

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Ambetter from Arkansas Health & Wellness, Ambetter from Louisiana Healthcare Connections, Ambetter Health 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 and accepts Medicare assignment

William Brian Thomas Psy.d. 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 ID2365436060
PECOS Enrollment IDI20040414000896
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 Reassignments

2

Medicare enrollment records show William Thomas reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Brian Thomas Psy D PLLC
0.1 mi
Clinical Neuropsychologist
144 S THOMAS ST STE 104A
Tupelo, MS 38801
  • Reassigned Medicare billing, Mississippi enrollment
NPI 1972924033 (662) 231-8916
North Mississippi Medical Center
1.7 mi
Surgery
499 GLOSTER CREEK VLG STE S-2
Tupelo, MS 38801
  • Reassigned Medicare billing, Mississippi enrollment
  • 581 clinicians in this Medicare group
NPI 1295932853 (662) 377-7546

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 4

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.
296 services107 patients
Psychiatric diagnostic evaluation 90791
A psychiatric diagnostic evaluation is a thorough assessment used to identify any mental health conditions you may have. It involves a detailed discussion about your symptoms, thoughts, feelings and behavior patterns. Your medical history and family's mental health history are also considered.
111 services111 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.
108 services108 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.
107 services107 patients

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.

93.1/100
MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program
Scored through an Alternative Payment Model
Quality83.08
Promoting Interoperability88
Improvement Activities40

Other Providers at the Same Location NPPES

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

BRIAN THOMAS PSY D PLLC
Clinical Neuropsychologist
144 S THOMAS ST STE 104A
TUPELO, MS 38801
Lee County (662) 231-8916

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 William Thomas's NPI number?

The NPI number for William Thomas is 1720022973. It was assigned to this individual provider in the NPPES registry on June 16, 2006.

Where is William Thomas located?

William Thomas practices at 144 S Thomas St Ste 104A, Tupelo, MS 38801. The listed phone number is (662) 231-8916.

What is William Thomas's specialty?

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

Is William Thomas enrolled in Medicare?

Yes. William Thomas 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 William Thomas's services?

According to the CMS Revalidation Reassignment List (October 2026 release), William Thomas reassigns Medicare benefits to 2 organizations: Brian Thomas Psy D PLLC (Tupelo, MS) and North Mississippi Medical Center (Tupelo, MS). 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 William Thomas's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does William Thomas accept?

Health plans from Ambetter Health, Ambetter from Arkansas Health & Wellness, Ambetter from Louisiana Healthcare Connections, Ambetter of Alabama and Ambetter of Tennessee and 5 other insurers list William Thomas 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 William Thomas was last updated on July 19, 2017. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 9 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.