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ICD-10-CM 2027 diagnosis code

S00.52Blister (nonthermal) of lip and oral cavity

Not billable — use a more specific codeRequires 7th character

S00.52 is a header code, so it can't be reported by itself. Choose one of the 2 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 S00.52

S00.52 is the ICD-10-CM diagnosis code for Blister (nonthermal) of lip and oral cavity. 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 2 subcodes must be used instead.

Within S00.5 (superficial injury of lip and oral cavity), S00.52 is specifically for Blister (nonthermal) of lip and oral cavity. Related codes cover unspecified superficial injury of lip and oral cavity (S00.50), abrasion of lip and oral cavity (S00.51), contusion of lip and oral cavity (S00.53), external constriction of lip and oral cavity (S00.54), superficial foreign body of lip and oral cavity (S00.55), insect bite (nonvenomous) of lip and oral cavity (S00.56) and other superficial bite of lip and oral cavity (S00.57).

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

  • Ainitial encounter
  • Dsubsequent encounter
  • Ssequela

Notes that apply from higher levels

Instructions written at a parent level also apply to S00.52.

› 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.

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 S00.52

Is S00.52 billable?

No. S00.52 is a header code. Report one of its more specific subcodes instead.