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ICD-10-PCS 2027 procedure code

041N4ASBypass Left Popliteal Artery to Lower Extremity Vein with Autologous Arterial Tissue, Percutaneous Endoscopic Approach

✓ Valid for 2027O.R. procedure

Short description: Bypass L Popl Art to Low Ex Vein w Autol Art, Perc Endo

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 041N4AS

041N4AS is the ICD-10-PCS code for a bypass procedure on the left popliteal artery using a percutaneous endoscopic approach with autologous arterial tissue (qualifier: lower extremity vein). 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 041K4AS (right femoral artery), 041L4AS (left femoral artery), 041M4AS (right popliteal artery), 041T4AS (right peroneal artery), 041U4AS (left peroneal artery), 041V4AS (right foot artery) and 1 more.

The same procedure with a different approach is coded 041N0AS (open).

With a different device, use 041N49S (autologous venous tissue), 041N4JS (synthetic substitute), 041N4KS (nonautologous tissue substitute) and 041N4ZS (no device).

It is an operating-room procedure in the MS-DRG logic for DRG 252 (Other Vascular Procedures with MCC), DRG 253 (Other Vascular Procedures with CC) and DRG 254 (Other Vascular Procedures without CC/MCC), under the surgical category “Other Vascular Procedures”.

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
4Lower 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
NPopliteal Artery, Left

Includes: Inferior genicular artery; Middle genicular artery; Superior genicular artery; Sural artery; Tibioperoneal trunk

5. Approach
4Percutaneous Endoscopic

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

6. Device
AAutologous Arterial Tissue
7. Qualifier
SLower Extremity Vein

Other versions of this procedure

Different approach

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 041N4AS

Is 041N4AS a valid ICD-10-PCS code for 2027?

Yes. 041N4AS is valid for inpatient procedures from October 1, 2026 through September 30, 2027.

Is 041N4AS an O.R. procedure?

Yes. 041N4AS is an O.R. procedure in MS-DRG v44.0.

What DRG does 041N4AS group to?

Depending on the principal diagnosis, 041N4AS can group to MS-DRG 252, MS-DRG 253 and MS-DRG 254.

What is the ICD-9 procedure code for 041N4AS?

The CMS GEMs map 041N4AS to ICD-9-CM 39.29 (Other (peripheral) vascular shunt or bypass).