ICD-10 M84.3
Non-Billable HeaderStress fracture
About ICD-10-CM M84.3
ICD-10-CM code M84.3 represents Stress fracture. This is a non-billable header code in the Musculoskeletal and Connective Tissue chapter (block M84). The 2026 edition of ICD-10-CM M84.3 became effective on October 1, 2025. Non-billable codes cannot be used as a primary or secondary diagnosis on a claim, use a more specific child code instead.
Inclusion Terms / Approximate Synonyms
Clinical terms and conditions classified under M84.3. Per CMS ICD-10-CM Tabular 2026.
- Fatigue fracture
- March fracture
- Stress fracture NOS
- Stress reaction
Type 1 Excludes
Pure excludes, these codes can never be coded together with M84.3. The conditions are mutually exclusive (e.g., congenital vs acquired forms).
- pathological fracture NOS (M84.4.-)
- pathological fracture due to osteoporosis (M80.-)
- traumatic fracture (S12.-, S22.-, S32.-, S42.-, S52.-, S62.-, S72.-, S82.-, S92.-)
Type 2 Excludes
Not included here, the excluded code is not part of M84.3, but a patient may have both conditions at the same time. Both codes may be coded together when applicable.
- personal history of (healed) stress (fatigue) fracture (Z87.312)
- stress fracture of vertebra (M48.4-)
Use Additional Code
When coding M84.3, also report these additional codes when applicable.
- external cause code(s) to identify the cause of the stress fracture
Coding Notes
Seven Chr Note
- The appropriate 7th character is to be added to each code from subcategory M84.3:
Medicare LCD Coverage for M84.3
Local Coverage Determinations (LCDs) from CMS MACs that list M84.3 as a covered diagnosis.
This doesn't mean the code isn't covered, it means no MAC has issued a Local Coverage Determination naming this specific code. Coverage may still apply under National Coverage Determinations or general medical-necessity rules.
Commercial Payer Coverage
Coverage policies from major commercial payers referencing M84.3.
Our payer policy database covers Aetna, Cigna, Anthem, BCBS, Humana, and Medicare Advantage plans, but M84.3 doesn't currently appear in any indexed policy. The code may still be covered under standard plan benefits.
CPT Codes Commonly Billed with M84.3
Procedures frequently paired with this diagnosis based on PayerReady's Dx↔Px linkage data.
We don't have CPT pairings indexed for this specific code yet. Use the CPT search above to find common procedures, or check your payer's published medical policy for code-specific guidance.
Codes Adjacent To M84.3
Other codes in section M80-M85 (Disorders of bone density and structure).
ICD-10 M84.3, Billing FAQ
Is ICD-10 code M84.3 billable? +
No, M84.3 is a non-billable header code. Use a more specific child code from block M84 when submitting claims.
What other names or terms map to M84.3? +
ICD-10 M84.3 includes: Fatigue fracture; March fracture; Stress fracture NOS, and 1 more clinical synonyms.
What codes are Type 1 Excludes for M84.3? +
Type 1 Excludes (never code together with M84.3): pathological fracture NOS (M84.4.-); pathological fracture due to osteoporosis (M80.-); traumatic fracture (S12.-, S22.-, S32.-, S42.-, S52.-, S62.-, S72.-, S82.-, S92.-)
What codes are Type 2 Excludes for M84.3? +
Type 2 Excludes (may be coded together when both conditions exist): personal history of (healed) stress (fatigue) fracture (Z87.312); stress fracture of vertebra (M48.4-)
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Reviewed by the PayerReady Medical Coding Team
Verified against the CMS 2026 code set on June 1, 2026.
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