Tier 1 Molecular Pathology ProceduresTier 1 molecular pathology covering common single-gene and small panel genetic tests, mutation analysis, and sequence-based assays. CPT range 81105–81383 including genetic analysis procedures and HLA typing subsets within Tier 1.Codes 81105–81383Total Codes: 214Sub-groups: 2Updated 5/4/20262 sub-groups
Tier 2 Molecular Pathology ProceduresTier 2 molecular pathology codes for advanced or multilocus sequence analysis and more complex molecular assays. CPT range 81400–81408 representing Tier 2 molecular pathology tests for higher-complexity sequence analyses.Codes 81400–81408Total Codes: 9Updated 5/4/2026Standalone