{"code":"R83.3","type":"code","title":"Abnormal level of substances chiefly nonmedicinal as to source in cerebrospinal fluid","codeAlso":[],"includes":[],"modern_v":"official26","codeFirst":[],"excludes1":["abnormal findings on antenatal screening of mother (O28.-)","diagnostic abnormal findings classified elsewhere - see Alphabetical Index"],"excludes2":["abnormal findings on examination of blood, without diagnosis (R70-R79)","abnormal findings on examination of urine, without diagnosis (R80-R82)","abnormal tumor markers (R97.-)"],"isBillable":true,"fyEffectivity":{"fy2026":true,"fy2027":true},"sibling_codes":["R83","R83.0","R83.1","R83.2","R83.4","R83.5","R83.6","R83.8","R83.9"],"inclusionTerms":[],"sibling_titles":{"code":"R83.9","title":"Unspecified abnormal finding in cerebrospinal fluid","isBillable":true},"useAdditionalCode":[],"clinicalDefinition":"Abnormal level of substances chiefly nonmedicinal as to source in cerebrospinal fluid is a billable ICD-10-CM diagnosis code (R83.3). Excludes1 (not coded here): abnormal findings on antenatal screening of mother (O28.-); diagnostic abnormal findings classified elsewhere - see Alphabetical Index. Excludes2 (not included here): abnormal findings on examination of blood, without diagnosis (R70-R79); abnormal findings on examination of urine, without diagnosis (R80-R82); abnormal tumor markers (R97.-).","officialDefinition":"Abnormal level of substances chiefly nonmedicinal as to source in cerebrospinal fluid is a billable ICD-10-CM diagnosis code (R83.3). Excludes1 (not coded here): abnormal findings on antenatal screening of mother (O28.-); diagnostic abnormal findings classified elsewhere - see Alphabetical Index. Excludes2 (not included here): abnormal findings on examination of blood, without diagnosis (R70-R79); abnormal findings on examination of urine, without diagnosis (R80-R82); abnormal tumor markers (R97.-).","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":""}