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ICD-10-PCS 2027 procedure code

021049CBypass Coronary Artery, One Artery from Thoracic Artery with Autologous Venous Tissue, Percutaneous Endoscopic Approach

✓ Valid for 2027O.R. procedure

Short description: Bypass 1 Cor Art from Thor Art w Autol Vn, Perc Endo

Code last changed in FY2017 (effective October 1, 2016). Source: official FY2027 ICD-10-PCS release from CMS. Page updated September 29, 2026. About our data

About 021049C

021049C is the ICD-10-PCS code for a bypass procedure on the coronary artery, one artery using a percutaneous endoscopic approach with autologous venous tissue (qualifier: thoracic 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 single internal mammary-coronary artery bypass, the ICD-9-CM procedure title it maps to (36.15).

For a different body part, codes include 021149C (coronary artery, two arteries), 021249C (coronary artery, three arteries) and 021349C (coronary artery, four or more arteries).

The same procedure with a different approach is coded 021009C (open).

With a different device, use 021048C (zooplastic tissue), 02104AC (autologous arterial tissue), 02104JC (synthetic substitute), 02104KC (nonautologous tissue substitute) and 02104ZC (no device).

It is an operating-room procedure in the MS-DRG logic for DRG 231 (Coronary Bypass with PTCA with MCC), DRG 232 (Coronary Bypass with PTCA without MCC), DRG 233 (Coronary Bypass with Cardiac Catheterization or Open Ablation with MCC), DRG 234 (Coronary Bypass with Cardiac Catheterization or Open Ablation without MCC), DRG 235 (Coronary Bypass without Cardiac Catheterization with MCC) and DRG 236 (Coronary Bypass without Cardiac Catheterization without MCC), under the surgical categories “” and “Coronary Bypass without Cardiac Catheterization”.

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
2Heart and Great Vessels
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
0Coronary Artery, One Artery
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
9Autologous Venous Tissue
7. Qualifier
CThoracic Artery

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.

MDC 05 · Diseases and Disorders of the Circulatory System · Coronary Bypass without Cardiac Catheterization

ICD-9-CM equivalent

Converter →
  • 36.15Single internal mammary-coronary artery 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)
  • FY2017 (effective 10/1/2016): Title revised — was “Bypass Coronary Artery, One Site from Thoracic Artery with Autologous Venous Tissue, Percutaneous Endoscopic Approach”

Common questions about 021049C

Is 021049C a valid ICD-10-PCS code for 2027?

Yes. 021049C is valid for inpatient procedures from October 1, 2026 through September 30, 2027.

Is 021049C an O.R. procedure?

Yes. 021049C is an O.R. procedure in MS-DRG v44.0.

What DRG does 021049C group to?

Depending on the principal diagnosis, 021049C can group to MS-DRG 231, MS-DRG 232, MS-DRG 233, MS-DRG 234, MS-DRG 235 and MS-DRG 236.

What is the ICD-9 procedure code for 021049C?

The CMS GEMs map 021049C to ICD-9-CM 36.15 (Single internal mammary-coronary artery bypass).