Alphabetic Index FY2027

M84.371

Stress fracture, right ankle

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.

M84.371 is a non-billable ICD-10-CM code header for stress fracture, right ankle. 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 a Use additional code instruction, 3 Excludes1 entries and 13 Excludes2 entries.

7th character

Category M84.3 requires a 7th character.

Assembled code M84.371A Open code

Use additional code

Add the listed code as a secondary code, if known.

Inherited from M84.3 Stress fracture
  • external cause code(s) to identify the cause of the stress fracture

Excludes1

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

Inherited from M84.3 Stress fracture

Excludes2

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

Inherited from M84.3 Stress fracture
  • personal history of (healed) stress (fatigue) fracture (Z87.312)
  • stress fracture of vertebra (M48.4-)
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 M84.371 6