ICD-10-CM 2027
ICD-10 code for knee recurrent derangement
From the official ICD-10-CM alphabetic index entry “Derangement › knee (recurrent)”. Page updated September 29, 2026.
About coding knee recurrent derangement
The ICD-10-CM code for knee recurrent derangement is M23.9 (Unspecified internal derangement of knee). The official index lists 37 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on M23.9.
Within M23, choose M23.9 (Unspecified internal derangement of knee) only when documentation doesn't support a more specific option: cystic meniscus (M23.0), derangement of meniscus due to old tear or injury (M23.2), other meniscus derangements (M23.3), Loose body in knee (M23.4), chronic instability of knee (M23.5), other spontaneous disruption of ligament(s) of knee (M23.6) and other internal derangements of knee (M23.8).
To report this condition, pick the subcode that matches the documentation: M23.90 (knee), M23.91 (knee) and M23.92 (knee).
It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.
More specific knee recurrent derangement codes (official index)
- ligament disruption, spontaneous M23.60 — Other spontaneous disruption of unspecified ligament of knee
- anterior cruciate M23.61 — Other spontaneous disruption of anterior cruciate ligament of knee
- capsular M23.67 — Other spontaneous disruption of capsular ligament of knee
- instability, chronic M23.5 — Chronic instability of knee
- lateral collateral M23.64 — Other spontaneous disruption of lateral collateral ligament of knee
- medial collateral M23.63 — Other spontaneous disruption of medial collateral ligament of knee
- posterior cruciate M23.62 — Other spontaneous disruption of posterior cruciate ligament of knee
- loose body M23.4 — Loose body in knee
- meniscus M23.30 — Other meniscus derangements, unspecified meniscus
- cystic M23.0 — Cystic meniscus
- lateral M23.002 — Cystic meniscus, unspecified lateral meniscus, unspecified knee
- anterior horn M23.04 — Cystic meniscus, anterior horn of lateral meniscus
- posterior horn M23.05 — Cystic meniscus, posterior horn of lateral meniscus
- specified NEC M23.06 — Cystic meniscus, other lateral meniscus
- medial M23.005 — Cystic meniscus, unspecified medial meniscus, unspecified knee
- anterior horn M23.01 — Cystic meniscus, anterior horn of medial meniscus
- posterior horn M23.02 — Cystic meniscus, posterior horn of medial meniscus
- specified NEC M23.03 — Cystic meniscus, other medial meniscus
- degenerate
- detached
- due to old tear or injury M23.20 — Derangement of unspecified meniscus due to old tear or injury
- lateral M23.20 — Derangement of unspecified meniscus due to old tear or injury
- anterior horn M23.24 — Derangement of anterior horn of lateral meniscus due to old tear or injury
- posterior horn M23.25 — Derangement of posterior horn of lateral meniscus due to old tear or injury
- specified NEC M23.26 — Derangement of other lateral meniscus due to old tear or injury
- medial M23.20 — Derangement of unspecified meniscus due to old tear or injury
- anterior horn M23.21 — Derangement of anterior horn of medial meniscus due to old tear or injury
- posterior horn M23.22 — Derangement of posterior horn of medial meniscus due to old tear or injury
- specified NEC M23.23 — Derangement of other medial meniscus due to old tear or injury
- retained
- specified NEC M23.30 — Other meniscus derangements, unspecified meniscus
- lateral M23.30 — Other meniscus derangements, unspecified meniscus
- anterior horn M23.34 — Other meniscus derangements, anterior horn of lateral meniscus
- posterior horn M23.35 — Other meniscus derangements, posterior horn of lateral meniscus
- specified NEC M23.36 — Other meniscus derangements, other lateral meniscus
- medial M23.30 — Other meniscus derangements, unspecified meniscus
- anterior horn M23.31 — Other meniscus derangements, anterior horn of medial meniscus
- posterior horn M23.32 — Other meniscus derangements, posterior horn of medial meniscus
- specified NEC M23.33 — Other meniscus derangements, other medial meniscus
- old M23.8X — Other internal derangements of knee
- specified NEC
Common questions about knee recurrent derangement ICD-10 codes
What is the ICD-10 code for knee recurrent derangement?
- M23.9 — Unspecified internal derangement of knee (a header code; report a more specific subcode). More specific codes apply when the documentation supports them: M23.60, M23.61, M23.67, M23.5 and others below.
What is the ICD-10 code for loose body knee recurrent derangement?
- M23.4 — Loose body in knee (header code; choose a more specific subcode).
What is the ICD-10 code for meniscus knee recurrent derangement?
- M23.30 — Other meniscus derangements, unspecified meniscus (header code; choose a more specific subcode).
What is the ICD-10 code for old knee recurrent derangement?
- M23.8X — Other internal derangements of knee (header code; choose a more specific subcode).
Is M23.9 billable?
- No. M23.9 is a header code. Report one of its more specific subcodes instead.