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ICD-10-PCS 2027 procedure code

4A1335CMonitoring of Arterial Flow, Coronary, Percutaneous 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 4A1335C

4A1335C is the ICD-10-PCS code for a monitoring procedure on the arterial using a percutaneous approach with flow (qualifier: coronary). In ICD-10-PCS, monitoring means determining the level of a physiological or physical function repetitively over a period of time.

In plain terms, this corresponds to monitoring of coronary blood flow, the ICD-9-CM procedure title it maps to (89.69).

The same procedure with a different approach is coded 4A1305C (open).

With a different device, use 4A133BC (pressure) and 4A133JC (pulse).

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
1Monitoring

Determining the level of a physiological or physical function repetitively over a period of time

4. Body System
3Arterial
5. Approach
3Percutaneous

Entry, by puncture or minor incision, of instrumentation through the skin or mucous membrane and any other body layers necessary to reach the site of the procedure

6. Function / Device
5Flow
7. Qualifier
CCoronary

Other versions of this procedure

Different approach

Different function / device

ICD-9-CM equivalent

Converter →
  • 89.69Monitoring of coronary blood flowapproximate

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 4A1335C

Is 4A1335C a valid ICD-10-PCS code for 2027?

Yes. 4A1335C is valid for inpatient procedures from October 1, 2026 through September 30, 2027.

What is the ICD-9 procedure code for 4A1335C?

The CMS GEMs map 4A1335C to ICD-9-CM 89.69 (Monitoring of coronary blood flow).