Alphabetic Index FY2027

M84.464

Pathological fracture, left fibula

FY2027Chapter 13: Diseases of the musculoskeletal system and connective tissue/M80–M85 Disorders of bone density and structure

Non-billable headerNot valid on its own. Use one of the more specific codes under it.

M84.464 is a non-billable ICD-10-CM code header for pathological fracture, left fibula. Report a more specific code from it instead. It is part of the FY2027 code set, effective October 1, 2026. A 7th character is required to complete the code. Its coding notes include 6 Excludes1 entries and 12 Excludes2 entries.

7th character

Category M84.4 requires a 7th character.

Assembled code M84.464A Open code

Guidelines tip

From the FY2027 Official Guidelines. ICD10Ref adds no rules of its own.

7th character A applies while the patient is in active treatment, regardless of which provider sees them. D is for routine care during healing after active treatment ends.

Guidelines I.C.13.cPathological fractures: the 7th characterRead the official text

Excludes1

Not coded here. The listed conditions generally should not be reported together.

Inherited from M84.4 Pathological fracture, not elsewhere classified

Excludes2

Not included here. Both codes may be reported if the patient has both conditions.

Inherited from M84.4 Pathological fracture, not elsewhere classified
  • personal history of (healed) pathological fracture (Z87.311)
Inherited from M84 Disorder of continuity of bone
  • traumatic fracture of bone-see fracture, by site
Also from chapter/block level (10 notes)
Inherited from Chapter 13 Diseases of the musculoskeletal system and connective tissue
  • 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)

Notes

Also from chapter/block level (1 note)
Inherited from Chapter 13 Diseases of the musculoskeletal system and connective tissue
  • Use an external cause code following the code for the musculoskeletal condition, if applicable, to identify the cause of the musculoskeletal condition

7th-character codes under M84.464 6