S90 – Superficial injury of ankle, foot and toes

ICD-10-CM 2027 diagnosis code · Injuries to the ankle and foot

Non-billable header

ICD-10-CM code S90

Code: S90 (claims format: S90)
Description: Superficial injury of ankle, foot and toes
Billable: No – use a more specific code below
Valid for: Dates of service October 1, 2026 – September 30, 2027 (FY2027)
Chapter: 19. Injury, poisoning and certain other consequences of external causes (S00-T88)
Block: S90-S99 Injuries to the ankle and foot

Billable codes under S90

S90 is a header code and cannot be used on claims. Choose the most specific code:

S90.0 – Contusion of ankleHeader (more codes below)
S90.1 – Contusion of toe without damage to nailHeader (more codes below)
S90.2 – Contusion of toe with damage to nailHeader (more codes below)
S90.3 – Contusion of footHeader (more codes below)
S90.4 – Other superficial injuries of toeHeader (more codes below)
S90.5 – Other superficial injuries of ankleHeader (more codes below)
S90.8 – Other superficial injuries of footHeader (more codes below)
S90.9 – Unspecified superficial injury of ankle, foot and toeHeader (more codes below)

7th character values

Codes in this category need a 7th character to describe the encounter or episode of care (use placeholder X for empty positions).

Character	Meaning
`A`	initial encounter
`D`	subsequent encounter
`S`	sequela

Notes for S90

7th character note:

The appropriate 7th character is to be added to each code from category S90

Notes inherited from parent codes

Instructional notes at a category or block level apply to every code below it.

Block S90-S99

Excludes2 (not included here):

burns and corrosions (T20-T32)
fracture of ankle and malleolus (S82.-)
frostbite (T33-T34)
insect bite or sting, venomous (T63.4)

Frequently asked questions

What is ICD-10 code S90?

S90 is the ICD-10-CM code for superficial injury of ankle, foot and toes, in the block S90-S99 (Injuries to the ankle and foot).

Is S90 a billable code?

No. S90 is a header code with more specific child codes; report one of the billable codes listed above.

Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.