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ICD-10-PCS 2027 procedure code

4A07X0ZMeasurement of Visual Acuity, External Approach

✓ Valid for 2027

Code unchanged since ICD-10-PCS took effect on October 1, 2015. Source: official FY2027 ICD-10-PCS release from CMS. Page updated September 29, 2026. About our data

About 4A07X0Z

4A07X0Z is the ICD-10-PCS code for a measurement procedure on the visual using an external approach with acuity. In ICD-10-PCS, measurement means determining the level of a physiological or physical function at a point in time.

In plain terms, this corresponds to visual field study, color vision study, dark adaptation study and 5 more, the ICD-9-CM procedure titles it maps to (95.05, 95.06, 95.07 and 5 more).

For a different body part, codes include 4A08X0Z (olfactory).

With a different device, use 4A07X7Z (mobility) and 4A07XBZ (pressure).

It doesn't appear in the MS-DRG procedure index, so on its own it doesn't change the DRG assignment.

It has been valid since ICD-10-PCS took effect on October 1, 2015.

What each character means

1. Section
4Measurement and Monitoring
2. Body System
APhysiological Systems
3. Operation
0Measurement

Determining the level of a physiological or physical function at a point in time

4. Body System
7Visual
5. Approach
XExternal

Procedures performed directly on the skin or mucous membrane and procedures performed indirectly by the application of external force through the skin or mucous membrane

6. Function / Device
0Acuity
7. Qualifier
ZNo Qualifier

Other versions of this procedure

Different body system

Different function / device

ICD-9-CM equivalent

Converter →
  • 95.05Visual field studyapproximate
  • 95.06Color vision studyapproximate
  • 95.07Dark adaptation studyapproximate
  • 95.21Electroretinogram [ERG]approximate
  • 95.22Electro-oculogram [EOG]approximate
  • 95.23Visual evoked potential [VEP]approximate
  • 95.24Electronystagmogram [ENG]approximate
  • 95.25Electromyogram of eye [EMG]approximate

From the CMS 2018 General Equivalence Mappings (GEMs), the final GEMs release.

Code history

  1. 2016
  2. 2017
  3. 2018
  4. 2019
  5. 2020
  6. 2021
  7. 2022
  8. 2023
  9. 2024
  10. 2025
  11. 2026
  12. 2027
  • FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
  • No changes since FY2016.

Common questions about 4A07X0Z

Is 4A07X0Z a valid ICD-10-PCS code for 2027?

Yes. 4A07X0Z is valid for inpatient procedures from October 1, 2026 through September 30, 2027.

What is the ICD-9 procedure code for 4A07X0Z?

The CMS GEMs map 4A07X0Z to ICD-9-CM 95.05 (Visual field study), 95.06 (Color vision study), 95.07 (Dark adaptation study) and 5 more.