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ICD-10-CM 2027 diagnosis code

S02.10Unspecified fracture of base of skull

Not billable — use a more specific codeRequires 7th character

S02.10 is a header code, so it can't be reported by itself. Choose one of the 9 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 S02.10

S02.10 is the ICD-10-CM diagnosis code for unspecified fracture of base of skull. It belongs to category S02 (fracture of skull and facial bones), 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 9 subcodes must be used instead.

Within S02.1, choose S02.10 (Unspecified fracture of base of skull) only when documentation doesn't support a more specific option: fracture of occiput (S02.11), fracture of orbital roof (S02.12) and other fracture of base of skull (S02.19).

Codes in this range require a 7th character: A for initial encounter for closed fracture, B for initial encounter for open fracture, D for subsequent encounter for fracture with routine healing, G for subsequent encounter for fracture with delayed healing, K for subsequent encounter for fracture with nonunion 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 S02

  • Ainitial encounter for closed fractureS02.10XA
  • Binitial encounter for open fractureS02.10XB
  • Dsubsequent encounter for fracture with routine healingS02.10XD
  • Gsubsequent encounter for fracture with delayed healingS02.10XG
  • Ksubsequent encounter for fracture with nonunionS02.10XK
  • SsequelaS02.10XS

Notes that apply from higher levels

Instructions written at a parent level also apply to S02.10.

› From S02.1 Fracture of base of skull
Excludes2
› From S02 Fracture of skull and facial bones
Note
  • A fracture not indicated as open or closed should be coded to closed
Code also
  • any associated intracranial injury (S06.-)

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 S02.10.

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 S02.10

Is S02.10 billable?

No. S02.10 is a header code. Report one of its more specific subcodes instead.