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ICD-10-CM 2027 diagnosis code

S00.541External constriction of lip

Not billable — use a more specific codeRequires 7th character

S00.541 is a header code, so it can't be reported by itself. Choose one of the 3 more specific codes beneath it and add the required 7th character.

Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About S00.541

S00.541 is the ICD-10-CM diagnosis code for external constriction of lip. It belongs to category S00 (superficial injury of head), block S00-S09 (injuries to the head) and chapter 19 (injury, poisoning and certain other consequences of external causes). It is a header code, so it can't be reported by itself; one of its 3 subcodes must be used instead.

Within S00.54 (external constriction of lip and oral cavity), S00.541 is specifically for external constriction of lip. Related codes cover oral cavity (S00.542).

Codes in this range require a 7th character: A for initial encounter, D for subsequent encounter and S for sequela. Use placeholder "X" characters to fill any empty positions before the 7th character.

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.

7th character

The appropriate 7th character is to be added to each code from category S00

Notes that apply from higher levels

Instructions written at a parent level also apply to S00.541.

› From S00 Superficial injury of head
Excludes1
  • diffuse cerebral contusion (S06.2-)
  • focal cerebral contusion (S06.3-)
  • injury of eye and orbit (S05.-)
  • open wound of head (S01.-)

Broader instructions also apply from S00-S09 Injuries to the head and Chapter 19: Injury, poisoning and certain other consequences of external causes.

Alphabetic index entries

2 entries

Terms in the official ICD-10-CM index that lead to S00.541.

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 S00.541

Is S00.541 billable?

No. S00.541 is a header code. Report one of its more specific subcodes instead.