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ICD-10-CM 2027 diagnosis code

S01.551Open bite of lip

Not billable — use a more specific codeRequires 7th character

S01.551 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.

Looking up by condition? See ICD-10 code for Lip bite.

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 S01.551

S01.551 is the ICD-10-CM diagnosis code for open bite of lip. It belongs to category S01 (open wound 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 S01.55 (open bite of lip and oral cavity), S01.551 is specifically for open bite of lip. Related codes cover oral cavity (S01.552).

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.

Don't report S01.551 together with the conditions in its Excludes1 note: superficial bite of lip (S00.571).

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 S01

Coding notes

Applicable toConditions and synonyms classified to this code
  • Bite of lip NOS
Excludes1Not coded here — never report together with this code

Notes that apply from higher levels

Instructions written at a parent level also apply to S01.551.

› From S01.5 Open wound of lip and oral cavity
Excludes2
› From S01 Open wound of head
Excludes1
  • open skull fracture (S02.- with 7th character B)
Excludes2
  • injury of eye and orbit (S05.-)
  • traumatic amputation of part of head (S08.-)
Code also
  • any associated:
  • injury of cranial nerve (S04.-)
  • injury of muscle and tendon of head (S09.1-)
  • intracranial injury (S06.-)
  • wound infection

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

1 entries

Terms in the official ICD-10-CM index that lead to S01.551.

Codes whose notes reference S01.551

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 S01.551

Is S01.551 billable?

No. S01.551 is a header code. Report one of its more specific subcodes instead.