ICD-10-PCS 2027 procedure code
037N4ZZDilation of Left External Carotid Artery, Percutaneous Endoscopic Approach
Short description: Dilation of Left External Carotid Artery, Perc Endo Approach
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 037N4ZZ
037N4ZZ is the ICD-10-PCS code for a dilation procedure on the left external carotid artery 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 percutaneous angioplasty of extracranial vessel(s), the ICD-9-CM procedure titles it maps to (00.40 and 00.61).
For a different body part, codes include 03704ZZ (right internal mammary artery), 03714ZZ (left internal mammary artery), 03724ZZ (innominate artery), 03734ZZ (right subclavian artery), 03744ZZ (left subclavian artery), 03754ZZ (right axillary artery) and 23 more.
The same procedure with a different approach is coded 037N0ZZ (open) and 037N3ZZ (percutaneous).
With a different device, use 037N44Z (intraluminal device, drug-eluting), 037N45Z (intraluminal device, drug-eluting, two), 037N46Z (intraluminal device, drug-eluting, three), 037N47Z (intraluminal device, drug-eluting, four or more), 037N4DZ (intraluminal device), 037N4EZ (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”, “Other Vascular Procedures”, “Other O.R. Procedures for Injuries” and 1 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
- 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
- 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
Different body part
- 03704ZZInternal Mammary Artery, Right
- 03714ZZInternal Mammary Artery, Left
- 03724ZZInnominate Artery
- 03734ZZSubclavian Artery, Right
- 03744ZZSubclavian Artery, Left
- 03754ZZAxillary Artery, Right
- 03764ZZAxillary Artery, Left
- 03774ZZBrachial Artery, Right
- 03784ZZBrachial Artery, Left
- 03794ZZUlnar Artery, Right
- 037A4ZZUlnar Artery, Left
- 037B4ZZRadial Artery, Right
Different approach
Different device
- 037N44ZIntraluminal Device, Drug-eluting
- 037N45ZIntraluminal Device, Drug-eluting, Two
- 037N46ZIntraluminal Device, Drug-eluting, Three
- 037N47ZIntraluminal Device, Drug-eluting, Four or More
- 037N4DZIntraluminal Device
- 037N4EZIntraluminal Device, Two
- 037N4FZIntraluminal Device, Three
- 037N4GZIntraluminal Device, Four or More
MS-DRG v44.0 grouping
All DRGs →Surgical MS-DRGs this procedure can group to, depending on the principal diagnosis's MDC.
MDC 01 · Diseases and Disorders of the Nervous System · Extracranial Procedures
MDC 05 · Diseases and Disorders of the Circulatory System · Other Vascular Procedures
MDC 21 · Injuries, Poisonings and Toxic Effects of Drugs · Other O.R. Procedures for Injuries
MDC 24 · Multiple Significant Trauma · Other O.R. Procedures for Multiple Significant Trauma
ICD-9-CM equivalent
Converter →- 00.40Procedure on single vesselapproximate, combination
- 00.61Percutaneous angioplasty of extracranial vessel(s)approximate, combination
From the CMS 2018 General Equivalence Mappings (GEMs), the final GEMs release.
Code history
- 2016
- 2017
- 2018
- 2019
- 2020
- 2021
- 2022
- 2023
- 2024
- 2025
- 2026
- 2027
- FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
- No changes since FY2016.
Common questions about 037N4ZZ
Is 037N4ZZ a valid ICD-10-PCS code for 2027?
- Yes. 037N4ZZ is valid for inpatient procedures from October 1, 2026 through September 30, 2027.
Is 037N4ZZ an O.R. procedure?
- Yes. 037N4ZZ is an O.R. procedure in MS-DRG v44.0.
What DRG does 037N4ZZ group to?
- Depending on the principal diagnosis, 037N4ZZ 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 037N4ZZ?
- The CMS GEMs map 037N4ZZ to ICD-9-CM 00.40 (Procedure on single vessel) and 00.61 (Percutaneous angioplasty of extracranial vessel(s)).