ICD-10-PCS Code For Neuropsychological: Procedure Code Group Overview

The International Classification of Diseases, Tenth Revision, Procedure Coding System (ICD-10-PCS) code group GZ13 includes procedures performed to administer and interpret standardized psychological tests in neuropsychological assessment. These ICD-10-PCS codes are used for inpatient documentation when formal psychological or neuropsychological testing and scoring are performed to evaluate cognitive, emotional, or behavioral function. Accurate coding within the ICD-10-PCS GZ13 group is essential for proper inpatient reimbursement, as it captures the assessment services performed and supports clinical documentation accuracy.

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Neuropsychological Psychological Tests Procedure Overview

This procedure group covers the administration and interpretation of standardized psychological tests and measurement instruments used to assess cognitive and psychological functioning. These procedures are part of mental health services and do not target an anatomical body system. Accurate coding of these procedures supports appropriate inpatient reimbursement by documenting the specific assessment services performed.

Code Attributes

Character	ICD-10-PCS Category	Code Group Details
G	Section	Mental Health
Z	Body System	None
1	Operation	Psychological Tests
3	Body Part	Neuropsychological

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ICD-10-PCS Code For Neuropsychological: Procedure Code Group Overview

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Neuropsychological Psychological Tests Procedure Overview

Code Attributes

Character	ICD-10-PCS Category	Code Group Details
G	Section	Mental Health
Z	Body System	None
1	Operation	Psychological Tests
3	Body Part	Neuropsychological

When to Use

Use a code from this group when formal neuropsychological or psychological testing is administered and interpreted during an inpatient encounter to assess cognitive, emotional, or behavioral status. Do not use these codes for informal screening or unstructured clinical interviews that do not involve standardized test administration and scoring.

ICD-10-PCS Codes

1 rows

ICD-10-PCS Code	Description
GZ13ZZZ	Psychological Tests, Neuropsychological

Typical Clinical Scenarios

An older adult with recent right hemispheric ischemic stroke is admitted for inpatient rehabilitation after acute stabilization; the care team notes new deficits in memory, attention, and executive function that impact therapy participation and discharge planning, so formal neuropsychological testing is performed to quantify cognitive impairments and guide rehabilitation goals. Typical codes: GZ13ZZZ.
A middle-aged patient hospitalized for severe traumatic brain injury with fluctuating orientation and delayed cognitive recovery undergoes structured neuropsychological test administration and interpretation to assess level of cognitive impairment, determine readiness for step-down care, and inform safety recommendations for discharge. Typical codes: GZ13ZZZ.
A patient with rapidly progressive cognitive decline admitted for medical evaluation to rule out reversible causes undergoes comprehensive neuropsychological testing during the inpatient stay to characterize the pattern and severity of deficits, differentiate delirium from underlying neurodegenerative disease, and direct further diagnostic workup. Typical codes: GZ13ZZZ.

Related Codes

GZ10-DEVELOPMENTAL-PSYCHOLOGICAL-TESTS

ICD-10-PCS Code For Developmental: Procedure Code Group Overview

GZ11-PERSONALITY-BEHAVIORAL-PSYCHOLOGICAL-TESTS

ICD-10-PCS Code For Personality And Behavioral: Procedure Code Group Overview

GZ12-INTELLECTUAL-PSYCHOEDUCATIONAL-PSYCHOLOGICAL-TESTS

ICD-10-PCS Code For Intellectual And Psychoeducational: Procedure Code Group Overview

GZ14-NEUROBEHAVIORAL-AND-COGNITIVE-STATUS-PSYCHOLOGICAL-TESTS

ICD-10-PCS Code For Neurobehavioral And Cognitive Status: Procedure Code Group Overview

Frequently Asked Questions

References

1.CPT® Codes and Descriptions. AAPC. Retrieved Aug 11, 2026.Maintains the CPT code set's official descriptions and guidelines, licensed from the American Medical Association, used as the definitional source for CPT codes on this page.
2.HCPCS Quarterly Update. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's quarterly release of HCPCS Level II codes and short/long descriptors, the source for HCPCS code definitions and update history.
3.ICD-10-CM Full Code List. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's complete ICD-10-CM diagnosis code list, used to cross-reference diagnosis codes associated with this procedure or service.

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When to Use

ICD-10-PCS Codes

1 rows

ICD-10-PCS Code	Description
GZ13ZZZ	Psychological Tests, Neuropsychological

Typical Clinical Scenarios

An older adult with recent right hemispheric ischemic stroke is admitted for inpatient rehabilitation after acute stabilization; the care team notes new deficits in memory, attention, and executive function that impact therapy participation and discharge planning, so formal neuropsychological testing is performed to quantify cognitive impairments and guide rehabilitation goals. Typical codes: GZ13ZZZ.
A middle-aged patient hospitalized for severe traumatic brain injury with fluctuating orientation and delayed cognitive recovery undergoes structured neuropsychological test administration and interpretation to assess level of cognitive impairment, determine readiness for step-down care, and inform safety recommendations for discharge. Typical codes: GZ13ZZZ.
A patient with rapidly progressive cognitive decline admitted for medical evaluation to rule out reversible causes undergoes comprehensive neuropsychological testing during the inpatient stay to characterize the pattern and severity of deficits, differentiate delirium from underlying neurodegenerative disease, and direct further diagnostic workup. Typical codes: GZ13ZZZ.

Related Codes

GZ10-DEVELOPMENTAL-PSYCHOLOGICAL-TESTS

ICD-10-PCS Code For Developmental: Procedure Code Group Overview

GZ11-PERSONALITY-BEHAVIORAL-PSYCHOLOGICAL-TESTS

ICD-10-PCS Code For Personality And Behavioral: Procedure Code Group Overview

GZ12-INTELLECTUAL-PSYCHOEDUCATIONAL-PSYCHOLOGICAL-TESTS

ICD-10-PCS Code For Intellectual And Psychoeducational: Procedure Code Group Overview

GZ14-NEUROBEHAVIORAL-AND-COGNITIVE-STATUS-PSYCHOLOGICAL-TESTS

ICD-10-PCS Code For Neurobehavioral And Cognitive Status: Procedure Code Group Overview

Frequently Asked Questions

References

1.CPT® Codes and Descriptions. AAPC. Retrieved Aug 11, 2026.Maintains the CPT code set's official descriptions and guidelines, licensed from the American Medical Association, used as the definitional source for CPT codes on this page.
2.HCPCS Quarterly Update. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's quarterly release of HCPCS Level II codes and short/long descriptors, the source for HCPCS code definitions and update history.
3.ICD-10-CM Full Code List. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's complete ICD-10-CM diagnosis code list, used to cross-reference diagnosis codes associated with this procedure or service.

Published by

Trek Health powers OpenPayer with a leading commercial payer intelligence platform, seamlessly converting fragmented payer data into actionable insights for provider organizations.

ICD-10-PCS Code For Neuropsychological: Procedure Code Group Overview

Sign up for ICD-10-PCS Code For Neuropsychological: Procedure Code Group Overview policy alerts

Neuropsychological Psychological Tests Procedure Overview

Code Attributes

ICD-10-PCS Code For Neuropsychological: Procedure Code Group Overview

Sign up for ICD-10-PCS Code For Neuropsychological: Procedure Code Group Overview policy alerts

Neuropsychological Psychological Tests Procedure Overview

Code Attributes

When to Use

ICD-10-PCS Codes

Typical Clinical Scenarios

Related Codes

What does the ICD-10-PCS GZ13 code group represent?

Which specific ICD-10-PCS code is included in this procedure group?

In which ICD-10-PCS section and body system is GZ13 classified?

Why is accurate coding within the GZ13 group important?

What types of services are described by the Psychological Tests, Neuropsychological procedure group?

References

When to Use

ICD-10-PCS Codes

Typical Clinical Scenarios

Related Codes

What does the ICD-10-PCS GZ13 code group represent?

Which specific ICD-10-PCS code is included in this procedure group?

In which ICD-10-PCS section and body system is GZ13 classified?

Why is accurate coding within the GZ13 group important?

What types of services are described by the Psychological Tests, Neuropsychological procedure group?

References