ICD-10-PCS Code For Central Nervous: Procedure Code Group Overview

The International Classification of Diseases, Tenth Revision, Procedure Coding System (ICD-10-PCS) code group 4B00 includes procedures performed to measure physiological functions in the central nervous system. These ICD-10-PCS codes are used for inpatient documentation when clinicians perform monitoring or measurement procedures to determine the level of central nervous system function. Accurate coding within the ICD-10-PCS 4B00 group is essential for proper inpatient reimbursement, as it captures the specific measurement performed and supports clinical documentation accuracy.

Customize your policy alerts

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

Get alerted when relevant policies change without checking for updates manually.

Monitor payer policy activity

Receive email alerts as soon as relevant payer policies are published or updated.

Central Nervous Measurement Procedure Overview

This procedure group includes measurement and monitoring procedures that determine the level of a physiological or physical function of the central nervous system. These procedures target physiological devices and assessment of central nervous system function rather than operative treatment of brain tissue. Accurate ICD-10-PCS coding in this group ensures inpatient records reflect the monitoring performed and supports appropriate payment and clinical documentation.

Code Attributes

Character	ICD-10-PCS Category	Code Group Details
4	Section	Measurement and Monitoring
B	Body System	Physiological Devices
0	Operation	Measurement
0	Body Part	Central Nervous

Explore openpayer tools

View all tools

ICD-10-PCS Code For Central Nervous: Procedure Code Group Overview

Customize your policy alerts

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

Get alerted when relevant policies change without checking for updates manually.

Monitor payer policy activity

Receive email alerts as soon as relevant payer policies are published or updated.

Central Nervous Measurement Procedure Overview

Code Attributes

Character	ICD-10-PCS Category	Code Group Details
4	Section	Measurement and Monitoring
B	Body System	Physiological Devices
0	Operation	Measurement
0	Body Part	Central Nervous

When to Use

Use a code from this group when a documented measurement or monitoring procedure was performed to determine central nervous system function during an inpatient stay. Select the code that matches the device and measurement method recorded in the medical record.

ICD-10-PCS Codes

2 rows

ICD-10-PCS Code	Description
4B00XVZ	Measurement of Central Nervous Stimulator, External Approach
4B00XW0	Measurement of Central Nervous Cerebrospinal Fluid Shunt using Wireless Sensor, External Approach

Typical Clinical Scenarios

An adult patient is admitted after a fall with altered mental status and fluctuating consciousness. The inpatient team uses an external central nervous system stimulator monitoring device at the bedside to measure cortical responsiveness and document neurologic function over a point-in-time assessment to guide ongoing neurologic care. This measurement documents device performance and the patient’s neurologic level without any intracranial operative intervention. Typical codes: 4B00XVZ
A patient with a history of chronic hydrocephalus is admitted electively for planned evaluation of shunt function because of progressive gait disturbance and cognitive decline. Clinicians use an external wireless sensor system to noninvasively measure cerebrospinal fluid shunt performance and intracranial dynamics at a specific time during the inpatient stay to determine if the shunt is functioning as intended. This assessment is performed using a physiological monitoring device rather than a surgical revision. Typical codes: 4B00XW0
A hospitalized patient with a previously implanted external neurostimulation system develops abrupt new neurologic symptoms and concern for device malfunction. Team members perform point-in-time measurement of the external stimulator to evaluate device output and verify whether the stimulator is contributing to the change in neurologic status prior to any decision for revision or explantation. The assessment focuses on measurement using the external device to inform next steps. Typical codes: 4B00XVZ

Related Codes

4B01-PERIPHERAL-NERVOUS-MEASUREMENT

ICD-10-PCS Code For Peripheral Nervous: Procedure Code Group Overview

4B02-CARDIAC-MEASUREMENT

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

4B09-RESPIRATORY-MEASUREMENT-EXTERNAL

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

4B0F-MUSCULOSKELETAL-MEASUREMENT

ICD-10-PCS Code For Musculoskeletal: 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.

Trek Health ingests and normalizes Transparency in Coverage data and payer policy updates to give provider organizations a clear view of how commercial reimbursement behaves across markets, payers, and services. Our platform transforms raw payer disclosures into structured intelligence that supports contract evaluation, payer negotiations, and service line strategy. By combining market benchmarks with ongoing policy visibility, Trek helps teams identify variability, risk, and opportunity in commercial reimbursement. The result is faster insight, stronger negotiating positions, and more informed financial decisions.

Explore openpayer tools

View all tools

When to Use

ICD-10-PCS Codes

2 rows

ICD-10-PCS Code	Description
4B00XVZ	Measurement of Central Nervous Stimulator, External Approach
4B00XW0	Measurement of Central Nervous Cerebrospinal Fluid Shunt using Wireless Sensor, External Approach

Typical Clinical Scenarios

An adult patient is admitted after a fall with altered mental status and fluctuating consciousness. The inpatient team uses an external central nervous system stimulator monitoring device at the bedside to measure cortical responsiveness and document neurologic function over a point-in-time assessment to guide ongoing neurologic care. This measurement documents device performance and the patient’s neurologic level without any intracranial operative intervention. Typical codes: 4B00XVZ
A patient with a history of chronic hydrocephalus is admitted electively for planned evaluation of shunt function because of progressive gait disturbance and cognitive decline. Clinicians use an external wireless sensor system to noninvasively measure cerebrospinal fluid shunt performance and intracranial dynamics at a specific time during the inpatient stay to determine if the shunt is functioning as intended. This assessment is performed using a physiological monitoring device rather than a surgical revision. Typical codes: 4B00XW0
A hospitalized patient with a previously implanted external neurostimulation system develops abrupt new neurologic symptoms and concern for device malfunction. Team members perform point-in-time measurement of the external stimulator to evaluate device output and verify whether the stimulator is contributing to the change in neurologic status prior to any decision for revision or explantation. The assessment focuses on measurement using the external device to inform next steps. Typical codes: 4B00XVZ

Related Codes

4B01-PERIPHERAL-NERVOUS-MEASUREMENT

ICD-10-PCS Code For Peripheral Nervous: Procedure Code Group Overview

4B02-CARDIAC-MEASUREMENT

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

4B09-RESPIRATORY-MEASUREMENT-EXTERNAL

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

4B0F-MUSCULOSKELETAL-MEASUREMENT

ICD-10-PCS Code For Musculoskeletal: 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 Central Nervous: Procedure Code Group Overview

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

Central Nervous Measurement Procedure Overview

Code Attributes

ICD-10-PCS Code For Central Nervous: Procedure Code Group Overview

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

Central Nervous Measurement Procedure Overview

Code Attributes

When to Use

ICD-10-PCS Codes

Typical Clinical Scenarios

Related Codes

Which procedures are included in the ICD-10-PCS 4B00 code group?

What is the primary purpose of procedures coded to 4B00?

Which ICD-10-PCS attributes define the 4B00 group?

How should coders use 4B00 codes for inpatient documentation?

Are there related DRGs listed for the 4B00 group?

References

When to Use

ICD-10-PCS Codes

Typical Clinical Scenarios

Related Codes

Which procedures are included in the ICD-10-PCS 4B00 code group?

What is the primary purpose of procedures coded to 4B00?

Which ICD-10-PCS attributes define the 4B00 group?

How should coders use 4B00 codes for inpatient documentation?

Are there related DRGs listed for the 4B00 group?

References