{"code":"G44.31","type":"code","title":"Acute post-traumatic headache","codeAlso":[],"includes":[],"modern_v":"official26","codeFirst":[],"excludes1":["headache NOS (R51.9)"],"excludes2":["atypical facial pain (G50.1)","headache due to lumbar puncture (G97.1)","migraines (G43.-)","trigeminal neuralgia (G50.0)"],"isBillable":false,"fyEffectivity":{"fy2026":true,"fy2027":true,"billableFy2026":false,"billableFy2027":false},"inclusionTerms":[],"useAdditionalCode":[],"clinicalDefinition":"Acute post-traumatic headache is a non-billable ICD-10-CM category code (G44.31). A more specific billable subcode must be selected for claims submission. Excludes1 (not coded here): headache NOS (R51.9). Excludes2 (not included here): atypical facial pain (G50.1); headache due to lumbar puncture (G97.1); migraines (G43.-); trigeminal neuralgia (G50.0).","officialDefinition":"Acute post-traumatic headache is a non-billable ICD-10-CM category code (G44.31). A more specific billable subcode must be selected for claims submission. Excludes1 (not coded here): headache NOS (R51.9). Excludes2 (not included here): atypical facial pain (G50.1); headache due to lumbar puncture (G97.1); migraines (G43.-); trigeminal neuralgia (G50.0).","seventhCharacterInstructions":[],"workflowProtocols":[],"guidelines":{"whenToUse":[],"whenNotToUse":[],"commonBillingMistakes":[],"codeComparisons":[],"documentationChecklist":[]},"domainLandscape":{"summary":"Primary diagnostic domain and clinical landscape evaluation.","keyCategories":[],"diagnosticContinuum":"Progression continuum from acute presentation to resolution."},"children":[],"hierarchy":[],"relatedCodes":[],"relevantCPTCodes":[],"documentationTips":[],"caseStudies":[],"description":"","overview":""}