M23.01

M23.01: Cystic meniscus, anterior horn of medial meniscus

Non-billable headerICD-10-CM

M23.01 is a non-billable header ICD-10-CM code for cystic meniscus, anterior horn of medial meniscus. It cannot be billed on its own: choose one of the more specific child codes below.

Excludes1 inherited from the categories above M23.01

A category’s note binds every code beneath it.

Written on M23: Internal derangement of knee

ankylosis (M24.66)
deformity of knee (M21.-)
osteochondritis dissecans (M93.2)

Excludes2 inherited from the categories above M23.01

Not part of this code, but both may be coded when both are present.

Written on M23: Internal derangement of knee

current injury - see injury of knee and lower leg (S80-S89)
recurrent dislocation or subluxation of joints (M24.4)
recurrent dislocation or subluxation of patella (M22.0-M22.1)

Risk adjustment

No CMS-HCC V28 category: this code does not change a RAF score.

Code history

Unchanged in every release from FY2024 to FY2027.

Code to one of these instead M23.01

3 child codes. Green means billable.