X78.1XXA ICD-10-CM Code: Intentional self-harm by knife, initial encounter
Billing Status: YES. This is a valid, specific, and billable ICD-10-CM reference.
Risk Adjustment (CMS-HCC)
Payment categories this diagnosis maps to under CMS-HCC V28, payment year 2026.
- HCC 155 — Major Depression, Moderate or Severe, without Psychosis
Other models: CMS-HCC V22 HCC 58 · RxHCC V08 HCC 132
Risk scores depend on the enrollee's full accepted diagnosis set and segment; a category mapping alone does not determine payment.
Code Set: Valid FY2026 and FY2027. FY2026 took effect October 1, 2025.
Official Registry Overview & Definition
Intentional self-harm by knife, initial encounter is a billable ICD-10-CM diagnosis code (X78.1A).
Frequently Asked Questions (FAQ) & Clinical Guidance
Does X78.1XXA require a 7th character?
Yes. The appropriate 7th character is to be added to each code from category X78.
Nearest Codes in This Family
Official ICD-10-CM classifications closest to X78.1XXA in its code family, with their registry titles.
- X78.0 — Intentional self-harm by sharp glass
- X78.0XXA — Intentional self-harm by sharp glass, initial encounter
- X78.0XXD — Intentional self-harm by sharp glass, subsequent encounter
- X78.0XXS — Intentional self-harm by sharp glass, sequela
- X78.1 — Intentional self-harm by knife
- X78.1XXD — Intentional self-harm by knife, subsequent encounter
- X78.1XXS — Intentional self-harm by knife, sequela
- X78.2 — Intentional self-harm by sword or dagger
- X78.2XXA — Intentional self-harm by sword or dagger, initial encounter
- X78.2XXD — Intentional self-harm by sword or dagger, subsequent encounter