4A08X0ZMeasurement of Olfactory Acuity, External Approach

Measurement and Monitoring›Physiological Systems›Measurement
  • Billable / Specific Code
ICD-10-PCS 4A08X0Z
CMS Source: FY 2026 ICD-10-PCS dataset. Effective Oct 1, 2025 – Sep 30, 2026.FacebookXLinkedInPrint

4A08X0Z is a billable ICD-10-PCS procedure code for Measurement of Olfactory Acuity, External Approach. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026). The root operation Measurement involves determining the level of a physiological or physical function at a point in time.

Code Identity

ICD-10-PCS Code
4A08X0Z
Billable Status
Yes — Valid for Submission
Code Describes
Measurement of Olfactory Acuity, External Approach
Parent Code
4A0
Short Description
Measurement of Olfactory Acuity, External Approach

PCS Table Breakdown

Each ICD-10-PCS code is built from seven characters, each an axis of the procedure. Hover or tap the icons for the official CMS definitions.

PositionDesignationValueMeaning
1Section4Measurement and Monitoring
2Body SystemAPhysiological Systems
3Operation0Measurement
4BodySystem8Olfactory
5ApproachXExternal
6Function/Device0Acuity
7QualifierZNo Qualifier

Convert to ICD-9-PCS

Closest ICD-9-PCS equivalents for 4A08X0Z under the General Equivalence Mappings.

89.12
Approximate match.

Questions About 4A08X0Z

Is 4A08X0Z a billable code?

Yes. 4A08X0Z is a complete seven-character ICD-10-PCS code, specific enough to report Measurement of Olfactory Acuity, External Approach on inpatient claims from October 1, 2025 through September 30, 2026.

What do the characters in 4A08X0Z mean?

4A08X0Z breaks down character by character: the 1st character 4 is the Section (Measurement and Monitoring); the 2nd character A is the Body System (Physiological Systems); the 3rd character 0 is the Operation (Measurement); the 4th character 8 is the BodySystem (Olfactory); the 5th character X is the Approach (External); the 6th character 0 is the Function/Device (Acuity); the 7th character Z is the Qualifier (No Qualifier).

What is the ICD-9-PCS equivalent of 4A08X0Z?

Under the General Equivalence Mappings, Measurement of Olfactory Acuity, External Approach crosswalks to ICD-9-PCS 89.12. The mapping is approximate, so confirm it fits the documentation.