M84.3
ICD-10Non-billable categoryStress fracture
Official ICD-10-CM descriptor (FY2026)
Stress fracture
M84.3 is a category heading, not a billable code. CMS does not accept it on a claim; report one of the more specific codes beneath it.
Inclusion terms
- Fatigue fracture
- March fracture
- Stress fracture NOS
- Stress reaction
Excludes1
Not coded here. An Excludes1 code should never be reported at the same time as the code above it.
- pathological fracture NOS (M84.4.-)
- pathological fracture due to osteoporosis (M80.-)
- traumatic fracture (S12.-, S22.-, S32.-, S42.-, S52.-, S62.-, S72.-, S82.-, S92.-)
Excludes2
Not included here. The condition is not part of this code, but a patient may have both, and both codes may be reported together.
- personal history of (healed) stress (fatigue) fracture (Z87.312)
- stress fracture of vertebra (M48.4-)
Use additional code
Report an additional code to identify the associated condition.
- external cause code(s) to identify the cause of the stress fracture
7th character
- The appropriate 7th character is to be added to each code from subcategory M84.3:
Permitted 7th characters
| 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 |
ICD-10-CM FY2026 defines 9 codes beneath M84.3. See the ICD-10-CM index for what this site publishes.
Related codes in M84
- M84.4Pathological fracture, not elsewhere classifiedcategory
- M84.5Pathological fracture in neoplastic diseasecategory
- M84.6Pathological fracture in other diseasecategory
- M84.7Nontraumatic fracture, not elsewhere classifiedcategory
- M84.8Other disorders of continuity of bonecategory
- M84.9Disorder of continuity of bone, unspecified
Where this code sits
- Parent code
- M84
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ICD-10-CM FY2026. Centers for Medicare & Medicaid Services (CMS) / National Center for Health Statistics (NCHS), “2026 ICD-10-CM Code Descriptions in Tabular Order” (icd10cm_order_2026.txt). Download the original file from cms.gov. Public domain (US Government work). Descriptors, billable flags and instructional notes on this page are reproduced from that file without modification. Krasyn adds no clinical guidance.