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

DR. WILLIAM ERNEST NORDBROCK PH.D., ABPP
NPI 1881618965
Clinical Neuropsychologist in Crystal Lake, IL

Active since July 26, 2006PECOS Enrolled
755 MCARDLE DR, SUITE E, CRYSTAL LAKE, IL 60014(815) 355-8589(815) 923-7579 Get Directions Write a Review

NPPES record last updated: July 26, 2026. Verified against the NPPES registry weekly; last sync: July 26, 2026.

About Dr. William Ernest Nordbrock Ph.d., Abpp NPPES

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

DR. WILLIAM ERNEST NORDBROCK PH.D., ABPP (NPI 1881618965) is an individual clinical neuropsychologist in Crystal Lake, Illinois, licensed in Illinois (071-004915) and active in the NPI registry since July 2006. He is enrolled in Medicare PECOS and is a graduate of Other (1982).

NPPES Registry Identity

NPI1881618965
Entity TypeIndividualMale
Primary Taxonomy103G00000X
Provider Legal NameDR. WILLIAM ERNEST NORDBROCKCredential: PH.D., ABPP
Location Address755 MCARDLE DR, SUITE ECrystal Lake, IL 60014-1717
Mailing Address755 Mcardle Dr, Suite ECrystal Lake, IL 60014-1717 · (815) 355-8589 · Fax (815) 923-7579
Phone(815) 355-8589
Fax(815) 923-7579
Sole ProprietorYes
Medical School CMSOtherGraduated 1982
Enumeration DateJuly 26, 2006
Last NPPES UpdateJuly 26, 2026
✔ NPI 1881618965 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 IL · 071-004915
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.
755 MCARDLE DR, Crystal Lake, IL 60014
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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

Dr. William Ernest Nordbrock Ph.d., Abpp 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 ID6608949912
PECOS Enrollment IDI20141204000179
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 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.

Psychotherapy, 30 minutes 90832
Psychotherapy is a therapeutic interaction or treatment between a trained professional and a patient. In a 30-minute session, the therapist helps you explore feelings, thoughts, and behaviors to better understand yourself and manage life's challenges.
34 services29 patients
Psychotherapy, 1 hour 90837
Psychotherapy is a therapeutic interaction or treatment between a trained professional and a patient. In a 1-hour session, you'll talk about your feelings, thoughts, and behaviors to help identify and manage mental health issues. This process aids in personal growth, healing, and improved well-being.
33 services33 patients
Psychotherapy, 45 minutes 90834
Psychotherapy is a treatment method where you converse with a therapist about your thoughts, feelings, and behaviors. In a 45-minute session, the therapist assists you in understanding and managing your mental health concerns, improving emotional wellness, and promoting personal growth.
21 services21 patients
Psychiatric services complicated by communication factor 90785
Psychiatric services complicated by communication factors involve mental health care for individuals who have challenges with communication. This can include language barriers, speech disorders, or cognitive impairments. The process involves tailored strategies to ensure effective communication and appropriate mental health care.
17 services14 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 William Nordbrock's NPI number?

The NPI number for William Nordbrock is 1881618965. It was assigned to this individual provider in the NPPES registry on July 26, 2006.

Where is William Nordbrock located?

William Nordbrock practices at 755 Mcardle Dr Suite E, Crystal Lake, IL 60014. The listed phone number is (815) 355-8589.

What is William Nordbrock's specialty?

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

Is William Nordbrock enrolled in Medicare?

Yes. William Nordbrock 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.

When was this NPI record last updated?

The NPPES record for William Nordbrock was last updated on July 26, 2026. NPI Profile syncs with the weekly NPPES data releases published by CMS.