`S81.059S` Open bite, unspecified knee, sequela

Billable ICD-10-CM code, FY2026.

Built from S81.059 with 7th character S (sequela).

Applies from S81 Open wound of knee and lower leg

Excludes1 (never code together)

open fracture of knee and lower leg (S82.-)
traumatic amputation of lower leg (S88.-)

Excludes2 (not included here)

open wound of ankle and foot (S91.-)

Code also

any associated wound infection

7th character note

The appropriate 7th character is to be added to each code from category S81

7th character required

A — initial encounter
D — subsequent encounter
S — sequela

Applies from S81.05 Open bite of knee

Applicable to

Bite of knee NOS

Excludes1 (never code together)

superficial bite of knee (S80.27-)

Code annotations containing back-references to S81.059S

Back-references to S81.05

Type 1 Excludes: S80.27 Other superficial bite of knee ("open bite of knee (S81.05-)")

Back-references to S81

Type 2 Excludes: M23 Internal derangement of knee ("current injury - see injury of knee and lower leg (S80-S89)")
Type 2 Excludes: S71 Open wound of hip and thigh ("open wound of knee and lower leg (S81.-)")
Code Also: S84 Injury of nerves at lower leg level ("any associated open wound (S81.-)")
Code Also: S85 Injury of blood vessels at lower leg level ("any associated open wound (S81.-)")
Code Also: S86 Injury of muscle, fascia and tendon at lower leg level ("any associated open wound (S81.-)")

Nearby codes

S81.052D Open bite, left knee, subsequent encounter
S81.052S Open bite, left knee, sequela
S81.059 Open bite, unspecified knee
S81.059A Open bite, unspecified knee, initial encounter
S81.059D Open bite, unspecified knee, subsequent encounter
S81.059S Open bite, unspecified knee, sequela (this code)
S81.8 Open wound of lower leg
S81.80 Unspecified open wound of lower leg
S81.801 Unspecified open wound, right lower leg
S81.801A Unspecified open wound, right lower leg, initial encounter
S81.801D Unspecified open wound, right lower leg, subsequent encounter