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DR. SARAH MAILANDER DYER PHD
NPI 1043877475
Clinical Neuropsychologist in Belleville, IL

Active since May 21, 2019PECOS EnrolledAccepts Medicare Assignment
900 ROYAL HEIGHTS RD STE 14, BELLEVILLE, IL 62226(618) 744-7373(618) 744-7373 Get Directions Write a Review

NPPES record last updated: May 21, 2019. Verified against the NPPES registry weekly; last sync: November 01, 2026.

About Dr. Sarah Mailander Dyer Phd NPPES

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

DR. SARAH MAILANDER DYER PHD (NPI 1043877475) is an individual clinical neuropsychologist in Belleville, Illinois, licensed in Illinois (071010027) and active in the NPI registry since May 2019. She is enrolled in Medicare PECOS and is a graduate of Other (2017).

NPPES Registry Identity

NPI1043877475
Entity TypeIndividualFemale
Primary Taxonomy103G00000X
Provider Legal NameDR. SARAH MAILANDER DYERCredential: PHD
Location Address900 ROYAL HEIGHTS RD STE 14Belleville, IL 62226-5457
Mailing Address900 Royal Heights Rd Ste 14Belleville, IL 62226-5457 · (618) 744-7373 · Fax (618) 744-7373
Phone(618) 744-7373
Fax(618) 744-7373
Sole ProprietorNo
Medical School CMSOtherGraduated 2017
Enumeration DateMay 21, 2019
✔ NPI 1043877475 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyClinical NeuropsychologistBehavioral Health & Social Service Providers
Taxonomy Code103G00000X
Licenses✔ Licensed in IL · 071010027✔ Licensed in IN · 20043233A
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.
Also ListedPsychologistTaxonomy 103T00000X · License 071010027 (IL), 20043233A (IN)
900 ROYAL HEIGHTS RD STE 14, Belleville, IL 62226
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Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Medica, UnitedHealthcare.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

Dr. Sarah Mailander Dyer 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 ID9638562382
PECOS Enrollment IDI20220202000969
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 Sarah Dyer reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Amethyst Neuropsychology PLLC
2.0 mi
Clinical Neuropsychologist
4505 N ILLINOIS ST STE 7
Swansea, IL 62226
  • Reassigned Medicare billing, Illinois enrollment
NPI 1093542904 (618) 680-0317
Hessed Psychological Services LLC
248 mi
Clinical Neuropsychologist
1700 LINCOLN HWY STE J
St Charles, IL 60174
  • Reassigned Medicare billing, Illinois enrollment
  • 6 clinicians in this Medicare group
NPI 1871149781 (331) 707-4031

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.

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.
62 services23 patients
Administration of psychological or neuropsychological test, each additional 30 minutes 96137
This procedure involves administering psychological or neuropsychological tests to evaluate your mental functions. Each additional 30 minutes allows for a more in-depth assessment of your cognitive abilities, emotions, and behavior. It's crucial for accurate diagnosis and treatment planning.
42 services22 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.
23 services23 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.
23 services23 patients
Administration of psychological or neuropsychological test, first 30 minutes 96136
This procedure involves a health professional conducting a psychological or neuropsychological test. The first 30 minutes typically involve understanding your mental health or brain function through various assessments. This helps in diagnosing and treating mental health disorders effectively.
23 services23 patients

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 Dyer's NPI number?

The NPI number for Sarah Dyer is 1043877475. It was assigned to this individual provider in the NPPES registry on May 21, 2019.

Where is Sarah Dyer located?

Sarah Dyer practices at 900 Royal Heights Rd Ste 14, Belleville, IL 62226. The listed phone number is (618) 744-7373.

What is Sarah Dyer's specialty?

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

Is Sarah Dyer enrolled in Medicare?

Yes. Sarah Dyer 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 Sarah Dyer's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Sarah Dyer reassigns Medicare benefits to 2 organizations: Amethyst Neuropsychology PLLC (Swansea, IL) and Hessed Psychological Services LLC (St Charles, IL). 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 Sarah Dyer's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Sarah Dyer accept?

Health plans from Medica and UnitedHealthcare list Sarah Dyer 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 Dyer was last updated on May 21, 2019. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 7 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.