2020 ICD-10-CM Diagnosis Code M23.221

Derangement of posterior horn of medial meniscus due to old tear or injury, right knee

    2016 2017 2018 2019 2020 Billable/Specific Code
  • M23.221 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
  • Short description: Derang of post horn of medial mensc d/t old tear/inj, r knee
  • The 2020 edition of ICD-10-CM M23.221 became effective on October 1, 2019.
  • This is the American ICD-10-CM version of M23.221 - other international versions of ICD-10 M23.221 may differ.
The following code(s) above M23.221 contain annotation back-references
Annotation Back-References
In this context, annotation back-references refer to codes that contain:
  • Applicable To annotations, or
  • Code Also annotations, or
  • Code First annotations, or
  • Excludes1 annotations, or
  • Excludes2 annotations, or
  • Includes annotations, or
  • Note annotations, or
  • Use Additional annotations
that may be applicable to M23.221:
  • M00-M99
    2020 ICD-10-CM Range M00-M99

    Diseases of the musculoskeletal system and connective tissue

    Note
    • Use an external cause code following the code for the musculoskeletal condition, if applicable, to identify the cause of the musculoskeletal condition
    Type 2 Excludes
    • arthropathic psoriasis (L40.5-)
    • certain conditions originating in the perinatal period (P04-P96)
    • certain infectious and parasitic diseases (A00-B99)
    • compartment syndrome (traumatic) (T79.A-)
    • complications of pregnancy, childbirth and the puerperium (O00-O9A)
    • congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)
    • endocrine, nutritional and metabolic diseases (E00-E88)
    • injury, poisoning and certain other consequences of external causes (S00-T88)
    • neoplasms (C00-D49)
    • symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
    Diseases of the musculoskeletal system and connective tissue
  • M20-M25
    2020 ICD-10-CM Range M20-M25

    Other joint disorders

    Type 2 Excludes
    Other joint disorders
  • M23
    ICD-10-CM Diagnosis Code M23

    Internal derangement of knee

      2016 2017 2018 2019 2020 Non-Billable/Non-Specific Code
    Type 1 Excludes
    • ankylosis (M24.66)
    • current injury - see injury of knee and lower leg (S80-S89)
    • deformity of knee (M21.-)
    • osteochondritis dissecans (M93.2)
    • recurrent dislocation or subluxation of joints (M24.4)
    • recurrent dislocation or subluxation of patella (M22.0-M22.1)
    Internal derangement of knee
  • M23.2
    ICD-10-CM Diagnosis Code M23.2

    Derangement of meniscus due to old tear or injury

      2016 2017 2018 2019 2020 Non-Billable/Non-Specific Code
    Applicable To
    • Old bucket-handle tear
    Derangement of meniscus due to old tear or injury
Approximate Synonyms
  • Chronic derangement of posterior horn of medial meniscus of right knee
  • Derangement of medial meniscus due to old injury
  • Derangement of posterior horn of right medial meniscus due to old injury
ICD-10-CM M23.221 is grouped within Diagnostic Related Group(s) (MS-DRG v37.0):
  • 562 Fracture, sprain, strain and dislocation except femur, hip, pelvis and thigh with mcc
  • 563 Fracture, sprain, strain and dislocation except femur, hip, pelvis and thigh without mcc

Convert M23.221 to ICD-9-CM

Code History
  • 2016 (effective 10/1/2015): New code (first year of non-draft ICD-10-CM)
  • 2017 (effective 10/1/2016): No change
  • 2018 (effective 10/1/2017): No change
  • 2019 (effective 10/1/2018): No change
  • 2020 (effective 10/1/2019): No change
ICD-10-CM Codes Adjacent To M23.221
M23.204 Derangement of unspecified medial meniscus due to old tear or injury, left knee
M23.205 Derangement of unspecified medial meniscus due to old tear or injury, unspecified knee
M23.206 …… right knee
M23.207 …… left knee
M23.209 …… unspecified knee
M23.21 Derangement of anterior horn of medial meniscus due to old tear or injury
M23.211 …… right knee
M23.212 …… left knee
M23.219 …… unspecified knee
M23.22 Derangement of posterior horn of medial meniscus due to old tear or injury
M23.221 …… right knee
M23.222 …… left knee
M23.229 …… unspecified knee
M23.23 Derangement of other medial meniscus due to old tear or injury
M23.231 …… right knee
M23.232 …… left knee
M23.239 …… unspecified knee
M23.24 Derangement of anterior horn of lateral meniscus due to old tear or injury
M23.241 …… right knee
M23.242 …… left knee
M23.249 …… unspecified knee

Reimbursement claims with a date of service on or after October 1, 2015 require the use of ICD-10-CM codes.