S91.002 – Unspecified open wound, left ankle

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

Non-billable header

ICD-10-CM code S91.002

Code: S91.002 (claims format: S91002)
Description: Unspecified open wound, left ankle
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
Parent codes: S91 › S91.0 › S91.00

Billable codes under S91.002

S91.002 is a header code and cannot be used on claims. Choose the most specific code:

7th character values

Codes in this category need a 7th character to describe the encounter or episode of care.

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

Notes inherited from parent codes

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

S91 – Open wound of ankle, foot and toes

Excludes1 (not coded here):

open fracture of ankle, foot and toes (S92.-with 7th character B)
traumatic amputation of ankle and foot (S98.-)

Code also:

any associated wound infection

7th character note:

The appropriate 7th character is to be added to each code from category S91

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)

Related codes in S91.00

Frequently asked questions

What is ICD-10 code S91.002?

S91.002 is the ICD-10-CM code for unspecified open wound, left ankle, in the block S90-S99 (Injuries to the ankle and foot).

Is S91.002 a billable code?

No. S91.002 is a header code with more specific child codes; report one of the billable codes listed above.

What category does S91.002 belong to?

It belongs to category S91 – Open wound of ankle, foot and toes.

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.