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M23.25 ICD-10-CA code: Derangement of posterior horn of lateral meniscus due to old tear or injury

M23.25 is the ICD-10-CA code for “Derangement of posterior horn of lateral meniscus due to old tear or injury” in CIHI’s FY 2026–2027 release, in effect from Apr 1, 2026.

Official description

M23.25

Derangement of posterior horn of lateral meniscus due to old tear or injury

Short description: Derang post horn lat meniscus old tear

ICD-10-CA · Canada · Also written M2325

Notes for M23.25

As CIHI prints them, with any note M23.25 takes from the headings above it.

Includes

Excludes

Conditions classified elsewhere.

  • Ankylosis (M24.6)current injury - see injury to the knee and lower leg (S80-S89)deformity of knee (M21.-)disorders of patella (M22)osteochondritis dissecans (M93.2-)recurrent dislocation or subluxation (M24.4):• patella (M22.0-M22.1)From M23 Internal derangement of knee
  • Joints of the spine (M40-M54)From M20-M25 Other joint disorders
  • Certain:• conditions originating in the perinatal period (P00-P96)• disorders of the temporomandibular joint (K07.6)• infectious and parasitic diseases (A00-B99)compartment syndrome (T79.6)complications of pregnancy, childbirth and the puerperium (O00-O99)congenital malformations, deformations and chromosomal abnormalities (Q00-Q99)endocrine, nutritional and metabolic diseases (E00-E90)injury, poisoning and certain other consequences of external causes (S00-T98)neoplasms (C00-D48)symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R99)From Chapter 13: Diseases of the musculoskeletal system and connective tissue (M00-M99)

Note

  • The following fifth characters represent the following sites of involvement:0 Multiple sites1 Shoulder region: clavical , scapula — joint acromioclavicular, glenohumeral, sternoclavicular2 Upper arm: humerus — elbow joint,3 Forearm: radius , ulna — wrist joint,4 Hand: carpus, fingers, metacarpus — joints between these bones,5 Pelvic region and thigh: buttock , femur , pelvis — joint hip , sacroiliac6 Lower leg: fibula , tibia — knee joint7 Ankle and foot: metatarsus, tarsus, toes — other joints in foot8 Other:head neck ribs skull trunk vertebral column9 Site unspecifiedFrom Chapter 13: Diseases of the musculoskeletal system and connective tissue (M00-M99)

Where M23.25 sits

  1. 1ChapterChapter 13: Diseases of the musculoskeletal system and connective tissue (M00-M99)
  2. 2Block M00-M25Arthropathies
  3. 3Block M20-M25Other joint disorders
  4. 4Category M23Internal derangement of knee
  5. 5Subcategory M23.2Derangement of meniscus due to old tear or injury
  6. 6Valid code M23.25Derangement of posterior horn of lateral meniscus due to old tear or injury

Source and release

Data release
ICD-10-CA · FY 2026–2027
Effective date
Apr 1, 2026
Publisher
CIHI

This page is built from the ICD-10-CA catalog that Vero Codes reads when it suggests codes: Canadian Institute for Health Information’s FY 2026–2027 release, imported from the publisher’s file and checked against it. The description, notes and structured data come from the same record.

See M23.25 in the CIHI source

Frequently asked questions

What does ICD-10-CA code M23.25 mean?

M23.25 is the ICD-10-CA code for “Derangement of posterior horn of lateral meniscus due to old tear or injury” in CIHI’s ICD-10-CA FY 2026–2027 release.

Where is M23.25 in ICD-10-CA?

M23.25 sits under M23.2 Derangement of meniscus due to old tear or injury, within M23 Internal derangement of knee, within M20-M25 Other joint disorders, within M00-M25 Arthropathies, within Chapter 13: Diseases of the musculoskeletal system and connective tissue (M00-M99).

What coding notes apply to M23.25?

ICD-10-CA lists Includes, Excludes, Note notes for M23.25, including those from the headings it sits under. They are listed on this page with where each one comes from.

Which ICD-10-CA release does this page use?

It uses CIHI’s FY 2026–2027 release, in effect from Apr 1, 2026 to Mar 31, 2027. It is a reference: confirm the code against the current list and the payer’s rules before you submit it.

Codes beside M23.25

M23.20Derangement of meniscus due to old tear or injury, multiple sitesM23.21Derangement of anterior horn of medial meniscus due to old tear or injuryM23.22Derangement of posterior horn of medial meniscus due to old tear or injuryM23.23Derangement of other and unspecified medial meniscus due to old tear or injuryM23.24Derangement of anterior horn of lateral meniscus due to old tear or injuryM23.26Derangement of other and unspecified lateral meniscus due to old tear or injuryM23.29Derangement of unspecified meniscus due to old tear or injury