icd10-lookup
Local CLI tool for querying the CMS ICD-10-CM FY2026 diagnosis code set (bundled XML + order files from CMS/NCHS, public domain). Validates codes, returns full records with coding instructions and inherited parent notes, lists billable children under a prefix, searches by clinical keywords, and checks pairing relationships between two codes (useAdditional, codeFirst, codeAlso, excludes, subsumption). Use it when the user asks to validate an ICD-10-CM code, find a code from a clinical concept, discover mandatory companion codes, or check whether two diagnosis codes can coexist on the same claim.