M23.0 – Cystic meniscus
ICD-10-CM 2027 diagnosis code · Other joint disorders
ICD-10-CM code
M23.0
- Code
M23.0(claims format:M230)- Description
- Cystic meniscus
- Billable
- No – use a more specific code below
- Valid for
- Dates of service October 1, 2026 – September 30, 2027 (FY2027)
- Chapter
- 13. Diseases of the musculoskeletal system and connective tissue (M00-M99)
- Block
- M20-M25 Other joint disorders
- Parent codes
- M23
Billable codes under M23.0
M23.0 is a header code and cannot be used on claims. Choose the most specific code:
- M23.00 – Cystic meniscus, unspecified meniscusHeader (more codes below)
- M23.01 – Cystic meniscus, anterior horn of medial meniscusHeader (more codes below)
- M23.02 – Cystic meniscus, posterior horn of medial meniscusHeader (more codes below)
- M23.03 – Cystic meniscus, other medial meniscusHeader (more codes below)
- M23.04 – Cystic meniscus, anterior horn of lateral meniscusHeader (more codes below)
- M23.05 – Cystic meniscus, posterior horn of lateral meniscusHeader (more codes below)
- M23.06 – Cystic meniscus, other lateral meniscusHeader (more codes below)
Notes inherited from parent codes
Instructional notes at a category or block level apply to every code below it.
M23 – Internal derangement of knee
Excludes1 (not coded here):
Excludes2 (not included here):
Block M20-M25
Index terms for M23.0
Entries in the ICD-10-CM alphabetic index that lead to this code:
Related codes in M23
- M23.2 – Derangement of meniscus due to old tear or injuryHeader
- M23.3 – Other meniscus derangementsHeader
- M23.4 – Loose body in kneeHeader
- M23.5 – Chronic instability of kneeHeader
- M23.6 – Other spontaneous disruption of ligament(s) of kneeHeader
- M23.8 – Other internal derangements of kneeHeader
- M23.9 – Unspecified internal derangement of kneeHeader
Frequently asked questions
What is ICD-10 code M23.0?
M23.0 is the ICD-10-CM code for cystic meniscus, in the block M20-M25 (Other joint disorders).
Is M23.0 a billable code?
No. M23.0 is a header code with more specific child codes; report one of the billable codes listed above.
What category does M23.0 belong to?
It belongs to category M23 – Internal derangement of knee.
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.