2020 ICD-10-CM Diagnosis Code M25.66

Stiffness of knee, not elsewhere classified

    2016 2017 2018 2019 2020 Non-Billable/Non-Specific Code
  • M25.66 should not be used for reimbursement purposes as there are multiple codes below it that contain a greater level of detail.
  • The 2020 edition of ICD-10-CM M25.66 became effective on October 1, 2019.
  • This is the American ICD-10-CM version of M25.66 - other international versions of ICD-10 M25.66 may differ.
The following code(s) above M25.66 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 M25.66:
  • 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
  • M25
    ICD-10-CM Diagnosis Code M25

    Other joint disorder, not elsewhere classified

      2016 2017 2018 2019 2020 Non-Billable/Non-Specific Code
    Type 2 Excludes
    • abnormality of gait and mobility (R26.-)
    • acquired deformities of limb (M20-M21)
    • calcification of bursa (M71.4-)
    • calcification of shoulder (joint) (M75.3)
    • calcification of tendon (M65.2-)
    • difficulty in walking (R26.2)
    • temporomandibular joint disorder (M26.6-)
    Other joint disorder, not elsewhere classified
  • M25.6
    ICD-10-CM Diagnosis Code M25.6

    Stiffness of joint, not elsewhere classified

      2016 2017 2018 2019 2020 Non-Billable/Non-Specific Code
    Type 1 Excludes
    Stiffness of joint, not elsewhere classified
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

Diagnosis Index entries containing back-references to M25.66:
  • Stiffness, joint NEC M25.60-
    ICD-10-CM Diagnosis Code M25.60-

    Stiffness of unspecified joint, not elsewhere classified

      2016 2017 2018 2019 2020 Billable/Specific Code
    • knee M25.66-

ICD-10-CM Codes Adjacent To M25.66
M25.632 Stiffness of left wrist, not elsewhere classified
M25.639 Stiffness of unspecified wrist, not elsewhere classified
M25.64 Stiffness of hand, not elsewhere classified
M25.641 Stiffness of right hand, not elsewhere classified
M25.642 Stiffness of left hand, not elsewhere classified
M25.649 Stiffness of unspecified hand, not elsewhere classified
M25.65 Stiffness of hip, not elsewhere classified
M25.651 Stiffness of right hip, not elsewhere classified
M25.652 Stiffness of left hip, not elsewhere classified
M25.659 Stiffness of unspecified hip, not elsewhere classified
M25.66 Stiffness of knee, not elsewhere classified
M25.661 Stiffness of right knee, not elsewhere classified
M25.662 Stiffness of left knee, not elsewhere classified
M25.669 Stiffness of unspecified knee, not elsewhere classified
M25.67 Stiffness of ankle and foot, not elsewhere classified
M25.671 Stiffness of right ankle, not elsewhere classified
M25.672 Stiffness of left ankle, not elsewhere classified
M25.673 Stiffness of unspecified ankle, not elsewhere classified
M25.674 Stiffness of right foot, not elsewhere classified
M25.675 Stiffness of left foot, not elsewhere classified
M25.676 Stiffness of unspecified foot, not elsewhere classified

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