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ICD-10-CM Codes
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M00-M99
Diseases of the musculoskeletal system and connective tissue
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M20-M25
Other joint disorders
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M24-
Other specific joint derangements
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2020 ICD-10-CM Diagnosis Code M24.66
Ankylosis, knee
2016 2017 2018 2019 2020 Non-Billable/Non-Specific Code
- M24.66 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 M24.66 became effective on October 1, 2019.
- This is the American ICD-10-CM version of M24.66 - other international versions of ICD-10 M24.66 may differ.
The following code(s) above
M24.66 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
M24.66:
- M00-M99
2020 ICD-10-CM Range M00-M99
Diseases of the musculoskeletal system and connective tissueNote- 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)
- M20-M25
2020 ICD-10-CM Range M20-M25
Other joint disorders - M24
ICD-10-CM Diagnosis Code M24
Other specific joint derangements
2016 2017 2018 2019 2020 Non-Billable/Non-Specific Code
Type 1 Excludes- current injury - see injury of joint by body region
- M24.6
ICD-10-CM Diagnosis Code M24.6
Ankylosis of joint
2016 2017 2018 2019 2020 Non-Billable/Non-Specific Code
Type 1 Excludes- stiffness of joint without ankylosis (M25.6-)
- 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
Code annotations containing back-references to M24.66:
- Ankylosis (fibrous) (osseous) (joint) M24.60
ICD-10-CM Diagnosis Code M24.60
Ankylosis, unspecified joint
2016 2017 2018 2019 2020 Billable/Specific Code
ICD-10-CM Codes Adjacent To M24.66
M24.639 Ankylosis, unspecified wrist
M24.649 Ankylosis, unspecified hand
M24.66
Ankylosis, knee
M24.669 Ankylosis, unspecified knee
M24.67 Ankylosis, ankle and foot
M24.673 Ankylosis, unspecified ankle
M24.676 Ankylosis, unspecified foot
Reimbursement claims with a date of service on or after October 1, 2015 require the use of ICD-10-CM codes.
