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ICD-10-PCS 2027 procedure code

027W4ZZDilation of Thoracic Aorta, Descending, Percutaneous Endoscopic Approach

✓ Valid for 2027O.R. procedure

Short description: Dilation of Thoracic Aorta, Descending, Perc Endo Approach

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 027W4ZZ

027W4ZZ is the ICD-10-PCS code for a dilation procedure on the thoracic aorta, descending using a percutaneous endoscopic approach. In ICD-10-PCS, dilation means expanding an orifice or the lumen of a tubular body part.

In plain terms, this corresponds to procedure on single vessel and angioplasty of other non-coronary vessel(s), the ICD-9-CM procedure titles it maps to (00.40 and 39.50).

For a different body part, codes include 02704ZZ (coronary artery, one artery), 02714ZZ (coronary artery, two arteries), 02724ZZ (coronary artery, three arteries), 02734ZZ (coronary artery, four or more arteries), 027F4ZZ (aortic valve), 027G4ZZ (mitral valve) and 11 more.

The same procedure with a different approach is coded 027W0ZZ (open) and 027W3ZZ (percutaneous).

With a different device, use 027W44Z (intraluminal device, drug-eluting) and 027W4DZ (intraluminal 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
2Heart and Great Vessels
3. Operation
7Dilation

Expanding an orifice or the lumen of a tubular body part

The orifice can be a natural orifice or an artificially created orifice. Accomplished by stretching a tubular body part using intraluminal pressure or by cutting part of the orifice or wall of the tubular body part

Includes: Percutaneous transluminal angioplasty, internal urethrotomy

4. Body Part
WThoracic Aorta, Descending
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
ZNo Device
7. Qualifier
ZNo Qualifier

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 →
  • 00.40Procedure on single vesselapproximate, combination
  • 39.50Angioplasty of other non-coronary vessel(s)approximate, combination

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 “Dilation of Thoracic Aorta, Percutaneous Endoscopic Approach”

Common questions about 027W4ZZ

Is 027W4ZZ a valid ICD-10-PCS code for 2027?

Yes. 027W4ZZ is valid for inpatient procedures from October 1, 2026 through September 30, 2027.

Is 027W4ZZ an O.R. procedure?

Yes. 027W4ZZ is an O.R. procedure in MS-DRG v44.0.

What DRG does 027W4ZZ group to?

Depending on the principal diagnosis, 027W4ZZ can group to MS-DRG 252, MS-DRG 253 and MS-DRG 254.

What is the ICD-9 procedure code for 027W4ZZ?

The CMS GEMs map 027W4ZZ to ICD-9-CM 00.40 (Procedure on single vessel) and 39.50 (Angioplasty of other non-coronary vessel(s)).