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ICD-10-PCS 2027 procedure code

031L09KBypass Left Internal Carotid Artery to Left Extracranial Artery with Autologous Venous Tissue, Open Approach

✓ Valid for 2027O.R. procedure

Short description: Bypass L Int Carotid to L Extracran Art w Autol Vn, Open

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 031L09K

031L09K is the ICD-10-PCS code for a bypass procedure on the left internal carotid artery using an open approach with autologous venous tissue (qualifier: left extracranial artery). In ICD-10-PCS, bypass means altering the route of passage of the contents of a tubular body part.

In plain terms, this corresponds to other (peripheral) vascular shunt or bypass, the ICD-9-CM procedure title it maps to (39.29).

For a different body part, codes include 031209K (innominate artery), 031309K (right subclavian artery), 031409K (left subclavian artery), 031509K (right axillary artery), 031609K (left axillary artery), 031H09K (right common carotid artery) and 4 more.

With a different device, use 031L0AK (autologous arterial tissue), 031L0JK (synthetic substitute), 031L0KK (nonautologous tissue substitute) and 031L0ZK (no device).

It is an operating-room procedure in the MS-DRG logic for DRG 037 (Extracranial Procedures with MCC), DRG 038 (Extracranial Procedures with CC), DRG 039 (Extracranial Procedures without CC/MCC), DRG 166 (Other Respiratory System O.R. Procedures with MCC), DRG 167 (Other Respiratory System O.R. Procedures with CC) and DRG 168 (Other Respiratory System O.R. Procedures without CC/MCC), under the surgical categories “Extracranial Procedures”, “Other Respiratory System O.R. Procedures”, “Other Vascular Procedures” and 5 more.

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

What each character means

1. Section
0Medical and Surgical
2. Body System
3Upper Arteries
3. Operation
1Bypass

Altering the route of passage of the contents of a tubular body part

Rerouting contents of a body part to a downstream area of the normal route, to a similar route and body part, or to an abnormal route and dissimilar body part. Includes one or more anastomoses, with or without the use of a device

Includes: Coronary artery bypass, colostomy formation

4. Body Part
LInternal Carotid Artery, Left

Includes: Caroticotympanic artery; Carotid sinus

5. Approach
0Open

Cutting through the skin or mucous membrane and any other body layers necessary to expose the site of the procedure

6. Device
9Autologous Venous Tissue
7. Qualifier
KExtracranial Artery, Left

Other versions of this procedure

MS-DRG v44.0 grouping

All DRGs →

Surgical MS-DRGs this procedure can group to, depending on the principal diagnosis's MDC.

ICD-9-CM equivalent

Converter →
  • 39.29Other (peripheral) vascular shunt or bypassapproximate

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 031L09K

Is 031L09K a valid ICD-10-PCS code for 2027?

Yes. 031L09K is valid for inpatient procedures from October 1, 2026 through September 30, 2027.

Is 031L09K an O.R. procedure?

Yes. 031L09K is an O.R. procedure in MS-DRG v44.0.

What DRG does 031L09K group to?

Depending on the principal diagnosis, 031L09K can group to MS-DRG 037, MS-DRG 038, MS-DRG 039, MS-DRG 166, MS-DRG 167 and MS-DRG 168.

What is the ICD-9 procedure code for 031L09K?

The CMS GEMs map 031L09K to ICD-9-CM 39.29 (Other (peripheral) vascular shunt or bypass).