M23.34 – Other meniscus derangements, anterior horn of lateral meniscus

ICD-10-CM 2027 diagnosis code · Other joint disorders

Non-billable header

ICD-10-CM code M23.34
Code
M23.34 (claims format: M2334)
Description
Other meniscus derangements, anterior horn of lateral meniscus
Short description
Oth meniscus derangements, anterior horn of lateral 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 › M23.3

Billable codes under M23.34

M23.34 is a header code and cannot be used on claims. Choose the most specific code:

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):
  • ankylosis (M24.66)
  • deformity of knee (M21.-)
  • osteochondritis dissecans (M93.2)
Excludes2 (not included here):
  • 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)

M23.3 – Other meniscus derangements

Applicable to:
  • Degenerate meniscus
  • Detached meniscus
  • Retained meniscus

Block M20-M25

Excludes2 (not included here):

Index terms for M23.34

Entries in the ICD-10-CM alphabetic index that lead to this code:

Related codes in M23.3

Frequently asked questions

What is ICD-10 code M23.34?

M23.34 is the ICD-10-CM code for other meniscus derangements, anterior horn of lateral meniscus, in the block M20-M25 (Other joint disorders).

Is M23.34 a billable code?

No. M23.34 is a header code with more specific child codes; report one of the billable codes listed above.

What category does M23.34 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.