M84.379
Stress fracture, unspecified toe(s)
Not billable — category only FY2026 2025-10-01 → 2026-09-30
This is the unspecified option. 8 more
specific codes sit alongside it. Worth
checking whether the documentation supports one of them.
Exclusions 16 never code together
M84code
Excludes2
- traumatic fracture of bone-see fracture, by site
M84.3code
Excludes1
M00-M99chapter
Excludes2
- arthropathic psoriasis (L40.5-)L40.5-
- certain conditions originating in the perinatal period (P04-P96)P04-P96
- certain infectious and parasitic diseases (A00-B99)A00-B99
- compartment syndrome (traumatic) (T79.A-)T79.A-
- complications of pregnancy, childbirth and the puerperium (O00-O9A)O00-O9A
- congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)Q00-Q99
- endocrine, nutritional and metabolic diseases (E00-E88)E00-E88
- injury, poisoning and certain other consequences of external causes (S00-T88)S00-T88
- neoplasms (C00-D49)C00-D49
- symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)R00-R94
Excludes1 — never code together. The excluded condition and this one are mutually exclusive.
Excludes2 — not included here, but the patient may have both. Code both when documented.
7th character 6
A initial encounter for fracture
D subsequent encounter for fracture with routine healing
G subsequent encounter for fracture with delayed healing
K subsequent encounter for fracture with nonunion
P subsequent encounter for fracture with malunion
S sequela
Instructional notes 6
M84.3code
Inclusion terms
- Fatigue fracture
- March fracture
- Stress fracture NOS
- Stress reaction
Use additional code
- external cause code(s) to identify the cause of the stress fracture
M00-M99chapter
Notes
- Use an external cause code following the code for the musculoskeletal condition, if applicable, to identify the cause of the musculoskeletal condition
Index entries leading here 1
Alongside this code 8 same parent — M84.37
M84.371 Stress fracture, right ankle category M84.372 Stress fracture, left ankle category M84.373 Stress fracture, unspecified ankle category M84.374 Stress fracture, right foot category M84.375 Stress fracture, left foot category M84.376 Stress fracture, unspecified foot category M84.377 Stress fracture, right toe(s) category M84.378 Stress fracture, left toe(s) category
Subordinate codes 6
M84.379A Stress fracture, unsp toe(s), init encntr for fracture M84.379D Stress fracture, unsp toe(s), subs for fx w routn heal M84.379G Stress fracture, unsp toe(s), subs for fx w delay heal M84.379K Stress fracture, unsp toe(s), subs for fx w nonunion M84.379P Stress fracture, unsp toe(s), subs for fx w malunion M84.379S Stress fracture, unspecified toe(s), sequela
Additional references
AHA Coding Clinic® Licence required
Official coding advice for this code. Published by the American Hospital Association. Not included in this installation.