S91.15 – Open bite of toe without damage to nail

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

Non-billable header

ICD-10-CM code S91.15

Code: S91.15 (claims format: S9115)
Description: Open bite of toe without damage to nail
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 › S91.1

Billable codes under S91.15

S91.15 is a header code and cannot be used on claims. Choose the most specific code:

S91.151 – Open bite of right great toe without damage to nailHeader (more codes below)
S91.152 – Open bite of left great toe without damage to nailHeader (more codes below)
S91.153 – Open bite of unspecified great toe without damage to nailHeader (more codes below)
S91.154 – Open bite of right lesser toe(s) without damage to nailHeader (more codes below)
S91.155 – Open bite of left lesser toe(s) without damage to nailHeader (more codes below)
S91.156 – Open bite of unspecified lesser toe(s) without damage to nailHeader (more codes below)
S91.159 – Open bite of unspecified toe(s) without damage to nailHeader (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 S91.15

Applicable to:

Bite of toe NOS

Excludes1 (not coded here):

superficial bite of toe (S90.46-, S90.47-)

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)

Index terms for S91.15

Entries in the ICD-10-CM alphabetic index that lead to this code:

Related codes in S91.1

Frequently asked questions

What is ICD-10 code S91.15?

S91.15 is the ICD-10-CM code for open bite of toe without damage to nail, in the block S90-S99 (Injuries to the ankle and foot).

Is S91.15 a billable code?

No. S91.15 is a header code with more specific child codes; report one of the billable codes listed above.

What category does S91.15 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.