ICD-10-PCS Code For Unilateral-Single Seizure: Procedure Code Group Overview

The International Classification of Diseases, Tenth Revision, Procedure Coding System (ICD-10-PCS) code group GZB0 includes procedures performed to apply controlled electrical voltages to induce a unilateral single seizure. These ICD-10-PCS codes are used for inpatient documentation when electroconvulsive therapy is delivered as a single seizure on one side for treatment of a mental health disorder. Accurate coding within the ICD-10-PCS GZB0 group is essential for proper inpatient reimbursement, as it captures the procedure performed and supports clinical documentation accuracy.

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Unilateral-Single Seizure Electroconvulsive Therapy Procedure Overview

Procedures in this group involve the application of controlled electrical voltages to induce a single unilateral seizure for treatment of a mental health disorder. These procedures do not target an anatomical body system but instead deliver therapeutic electrical stimulation to one hemisphere to produce a single seizure. Accurate coding is important for inpatient reimbursement and clinical records because it captures the specific treatment modality and session details. Proper code selection supports documentation of care intensity and appropriate case mix assignment.

Code Attributes

Character	ICD-10-PCS Category	Code Group Details
G	Section	Mental Health
Z	Body System	None
B	Operation	Electroconvulsive Therapy
0	Body Part	Unilateral-Single Seizure

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ICD-10-PCS Code For Unilateral-Single Seizure: Procedure Code Group Overview

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Unilateral-Single Seizure Electroconvulsive Therapy Procedure Overview

Code Attributes

Character	ICD-10-PCS Category	Code Group Details
G	Section	Mental Health
Z	Body System	None
B	Operation	Electroconvulsive Therapy
0	Body Part	Unilateral-Single Seizure

When to Use

Use a code from this group when a single unilateral electroconvulsive therapy seizure is intentionally induced as the treatment session. Do not use these codes for bilateral seizures or for multiple-seizure treatment sessions.

ICD-10-PCS Codes

1 rows

ICD-10-PCS Code	Description
GZB0ZZZ	Electroconvulsive Therapy, Unilateral-Single Seizure

Typical Clinical Scenarios

An elderly patient with severe, treatment-resistant major depressive disorder is admitted for an inpatient course after failing multiple medication trials and psychotherapy; acute suicidal ideation and inability to eat or care for self prompt expedited ECT under monitoring to achieve rapid symptom control, with a single unilateral seizure delivered during the session to reduce cognitive side effects. Typical codes: GZB0ZZZ
A middle-aged patient with bipolar disorder presenting electively for inpatient stabilization due to recurrent depressive episodes despite outpatient management; the care team schedules a planned inpatient electroconvulsive therapy session to induce a single unilateral seizure as part of a controlled treatment regimen to accelerate mood improvement. Typical codes: GZB0ZZZ
A hospitalized patient with catatonia and failure to respond to benzodiazepines is taken for urgent ECT to resolve life-threatening immobility and refusal of oral intake; clinicians perform a single unilateral seizure during the emergent inpatient session aiming for rapid therapeutic effect while minimizing bilateral cognitive impact. Typical codes: GZB0ZZZ

ICD-10-PCS Code For Bilateral-Single Seizure: Procedure Code Group Overview

GZB4-OTHER-ELECTROCONVULSIVE-THERAPY

ICD-10-PCS Code For Other Electroconvulsive Therapy: 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
GZB0ZZZ	Electroconvulsive Therapy, Unilateral-Single Seizure

Typical Clinical Scenarios

An elderly patient with severe, treatment-resistant major depressive disorder is admitted for an inpatient course after failing multiple medication trials and psychotherapy; acute suicidal ideation and inability to eat or care for self prompt expedited ECT under monitoring to achieve rapid symptom control, with a single unilateral seizure delivered during the session to reduce cognitive side effects. Typical codes: GZB0ZZZ
A middle-aged patient with bipolar disorder presenting electively for inpatient stabilization due to recurrent depressive episodes despite outpatient management; the care team schedules a planned inpatient electroconvulsive therapy session to induce a single unilateral seizure as part of a controlled treatment regimen to accelerate mood improvement. Typical codes: GZB0ZZZ
A hospitalized patient with catatonia and failure to respond to benzodiazepines is taken for urgent ECT to resolve life-threatening immobility and refusal of oral intake; clinicians perform a single unilateral seizure during the emergent inpatient session aiming for rapid therapeutic effect while minimizing bilateral cognitive impact. Typical codes: GZB0ZZZ

ICD-10-PCS Code For Bilateral-Single Seizure: Procedure Code Group Overview

GZB4-OTHER-ELECTROCONVULSIVE-THERAPY

ICD-10-PCS Code For Other Electroconvulsive Therapy: 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.

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Unilateral-Single Seizure Electroconvulsive Therapy Procedure Overview

Code Attributes

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Unilateral-Single Seizure Electroconvulsive Therapy Procedure Overview

Code Attributes

When to Use

ICD-10-PCS Codes

Typical Clinical Scenarios

Related Codes

References

When to Use

ICD-10-PCS Codes

Typical Clinical Scenarios

Related Codes

References

ICD-10-PCS Code For Unilateral-Single Seizure: Procedure Code Group Overview

Sign up for ICD-10-PCS Code For Unilateral-Single Seizure: Procedure Code Group Overview policy alerts

Unilateral-Single Seizure Electroconvulsive Therapy Procedure Overview

Code Attributes

ICD-10-PCS Code For Unilateral-Single Seizure: Procedure Code Group Overview

Sign up for ICD-10-PCS Code For Unilateral-Single Seizure: Procedure Code Group Overview policy alerts

Unilateral-Single Seizure Electroconvulsive Therapy Procedure Overview

Code Attributes

When to Use

ICD-10-PCS Codes

Typical Clinical Scenarios

Related Codes

Which ICD-10-PCS code represents unilateral single-seizure electroconvulsive therapy?

What procedure does the `GZB0ZZZ` code describe?

Why is accurate coding of `GZB0ZZZ` important for inpatient care?

What are the section and operation attributes for the GZB0 code group?

When should `GZB0ZZZ` be used in billing and documentation?

References

When to Use

ICD-10-PCS Codes

Typical Clinical Scenarios

Related Codes

Which ICD-10-PCS code represents unilateral single-seizure electroconvulsive therapy?

What procedure does the `GZB0ZZZ` code describe?

Why is accurate coding of `GZB0ZZZ` important for inpatient care?

What are the section and operation attributes for the GZB0 code group?

When should `GZB0ZZZ` be used in billing and documentation?

References