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HomeICD-10 CodesM23
ICD-10-CM
Billable

M23

Classification
Category:
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Coding Guidance
Coding Guidance M23 should not be used for reimbursement purposes as there are more specific codes below it that contain a greater level of detail. See Related Codes to drill down to more specific billable codes for appropriate reimbursement.
Excludes 1
From
  • ankylosis ( M24.66 )
  • deformity of knee ( M21 .-)
  • osteochondritis dissecans ( M93.2 )
Excludes 2
From
  • 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 )
From
  • 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 )

More Specific Codes

M23.0
Cystic meniscus M23.0
M23.2
Derangement of meniscus due to old tear or injury M23.2
M23.3
Other meniscus derangements M23.3
M23.4
Loose body in knee M23.4
M23.5
Chronic instability of knee M23.5
M23.6
Other spontaneous disruption of ligament(s) of knee M23.6
M23.8
Other internal derangements of knee M23.8
M23.9
Unspecified internal derangement of knee M23.9
M00-M99
M00-M99 - Diseases of the musculoskeletal system and connective tissue

External Resources

2025 ICD-10 guidelines from CMS.gov