Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 30 days.

CHRISTOPHER PATRICK WILLIAMS PH.D.
NPI 1003505967
Clinical Neuropsychologist in Chicago, IL

Q: What is Christopher Williams's NPI number?

The NPI number for Christopher Williams is 1003505967. It was assigned to this individual provider in the NPPES registry on May 4, 2023.

Q: What is Christopher Williams's specialty?

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

Active since May 04, 2023PECOS Enrolled

2740 W FOSTER AVE STE 113, CHICAGO, IL 60625(847) 425-6400(847) 425-6408 Get Directions Write a Review

NPPES record last updated: July 27, 2026. Verified against the NPPES registry weekly; last sync: August 02, 2026.

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About Christopher Patrick Williams Ph.d. NPPES

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

CHRISTOPHER PATRICK WILLIAMS PH.D. (NPI 1003505967) is an individual clinical neuropsychologist in Chicago, Illinois, licensed in Illinois (071011013) and active in the NPI registry since May 2023. He is enrolled in Medicare PECOS, is affiliated with Northshore University Healthsystem - Evanston Hospital, and maintains a secondary practice location in Royal Oak.

NPPES Registry Identity

NPI1003505967

Entity TypeIndividualMale

Primary Taxonomy103G00000X

Provider Legal NameCHRISTOPHER PATRICK WILLIAMSCredential: PH.D.

Location Address2740 W FOSTER AVE STE 113Chicago, IL 60625-3547

Mailing Address2650 Ridge Ave Ste 1223Evanston, IL 60201-1700 · (847) 570-2040

Phone(847) 425-6400

Fax(847) 425-6408

Sole ProprietorYes

Medical School CMSOtherGraduated 2021

Enumeration DateMay 4, 2023

Last NPPES UpdateJuly 27, 2026

NPPES CertifiedJuly 27, 2026

✔ NPI 1003505967 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 3

★ Primary SpecialtyClinical NeuropsychologistBehavioral Health & Social Service Providers

Taxonomy Code103G00000X

License✔ Licensed in IL · 071011013

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 6301019196 (MI)

Also ListedPsychologist · ClinicalTaxonomy 103TC0700X · License 071011013 (IL)

2740 W FOSTER AVE STE 113, Chicago, IL 60625

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Secondary Practice Location 1

Location 12510 Galpin AveRoyal Oak, MI 48073-3115 · Phone (773) 218-0523

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Ambetter from Home State Health, Ambetter Health, Ambetter Health of Delaware.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Christopher Patrick Williams Ph.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 ID7618322132

PECOS Enrollment IDI20231018001068

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.

Areas of Expertise CMS Part B claims 7

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, 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.

213 services35 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.

171 services57 patients

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.

136 services24 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.

59 services57 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.

58 services58 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.

35 services35 patients

Hospital Affiliations CMS Care Compare

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Northshore University Healthsystem - Evanston Hospital

Acute Care Hospitals · Evanston, IL

5/5 CMS rating

OwnershipVoluntary non-profit - Other

CMS Certification Number140010

Location2650 Ridge AveEvanston, IL 60201 · Cook County

Emergency services Birthing friendly

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Other Providers at the Same Location NPPES 10

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

ALLISON DOMINGO LCSW

Social Worker (Clinical)