M23.004

M23.004: Cystic meniscus, unspecified medial meniscus, left knee

Billable / specific codeICD-10-CMleft

M23.004 is a billable, specific ICD-10-CM code for cystic meniscus, unspecified medial meniscus, left knee. It is valid for submission on a claim.

Check M23.004 with the rest of the claim: free scrubber

Excludes1 inherited from the categories above M23.004

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 M23.004

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.

Medicare coverage

M23.004 is named in 10 Medicare coverage policies: 3 listing it as supporting medical necessity, and 7 listing it as NOT covered. Which one applies depends on your Medicare contractor.

A58865Billing and Coding: Amniotic and Placental-Derived Product Injections and/or Applications for Musculoskeletal Indications, Non-Woundnot covered
A58883Billing and Coding: Amniotic and Placental-Derived Product Injections and/or Applications for Musculoskeletal Indications, Non-Woundnot covered
A58893Billing and Coding: Amniotic and Placental-Derived Product Injections and/or Applications for Musculoskeletal Indications, Non-Woundnot covered
A59374Billing and Coding: Amniotic and Placental-Derived Product Injections and/or Applications for Musculoskeletal Indications, Non-Woundnot covered

Code history

Unchanged in every release from FY2024 to FY2027.