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M85.661BillableSave

M85.661 - Other cyst of bone, right lower leg

ICD-10-CM Chapter 13: Diseases of the musculoskeletal system and connective tissue · M80-M85 Disorders of bone density and structure (M80-M85) · Subcategory of M85.66 · FY2027

Includes, Excludes and Coding Notes

Excludes 1 — Not Coded HereFrom M85.6

Mutually exclusive: these conditions are never reported together with this code.

  • cyst of jaw NEC (M27.4)
  • osteitis fibrosa cystica generalisata [von Recklinghausen's disease of bone] (E21.0)
Excludes 1 — Not Coded HereFrom M85

Mutually exclusive: these conditions are never reported together with this code.

  • osteogenesis imperfecta (Q78.0)
  • osteopetrosis (Q78.2)
  • osteopoikilosis (Q78.8)
  • polyostotic fibrous dysplasia (Q78.1)
Excludes 2 — Not Included HereFrom Chapter M00-M99

Not part of this code; report both codes when the patient has both conditions.

  • 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)
NotesFrom Chapter M00-M99

Instructional notes from the ICD-10-CM tabular list.

  • Use an external cause code following the code for the musculoskeletal condition, if applicable, to identify the cause of the musculoskeletal condition

Related condition guides

Documentation requirements, coding pitfalls and FAQs for conditions coded with M85.661.