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ICD-10-PCS 2027 procedure code

037N0ZZDilation of Left External Carotid Artery, Open Approach

✓ Valid for 2027O.R. procedure

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 037N0ZZ

037N0ZZ is the ICD-10-PCS code for a dilation procedure on the left external carotid artery using an open 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 03700ZZ (right internal mammary artery), 03710ZZ (left internal mammary artery), 03720ZZ (innominate artery), 03730ZZ (right subclavian artery), 03740ZZ (left subclavian artery), 03750ZZ (right axillary artery) and 23 more.

The same procedure with a different approach is coded 037N3ZZ (percutaneous) and 037N4ZZ (percutaneous endoscopic).

With a different device, use 037N04Z (intraluminal device, drug-eluting), 037N05Z (intraluminal device, drug-eluting, two), 037N06Z (intraluminal device, drug-eluting, three), 037N07Z (intraluminal device, drug-eluting, four or more), 037N0DZ (intraluminal device), 037N0EZ (intraluminal device, two) and 2 more.

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 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 categories “Extracranial Procedures” and “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
3Upper Arteries
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
NExternal Carotid Artery, Left

Includes: Ascending pharyngeal artery; Internal maxillary artery; Lingual artery; Maxillary artery; Occipital artery; Posterior auricular artery; Superior thyroid artery

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
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)
  • No changes since FY2016.

Common questions about 037N0ZZ

Is 037N0ZZ a valid ICD-10-PCS code for 2027?

Yes. 037N0ZZ is valid for inpatient procedures from October 1, 2026 through September 30, 2027.

Is 037N0ZZ an O.R. procedure?

Yes. 037N0ZZ is an O.R. procedure in MS-DRG v44.0.

What DRG does 037N0ZZ group to?

Depending on the principal diagnosis, 037N0ZZ can group to MS-DRG 037, MS-DRG 038, MS-DRG 039, MS-DRG 252, MS-DRG 253 and MS-DRG 254.

What is the ICD-9 procedure code for 037N0ZZ?

The CMS GEMs map 037N0ZZ to ICD-9-CM 00.40 (Procedure on single vessel) and 39.50 (Angioplasty of other non-coronary vessel(s)).