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ICD-10 H4020X1 Code Mapping

Terms & Definitions

Alternative: Single ICD-9 code reproduces the complete meaning of one ICD-10 code. Cluster: Multiple ICD-9 codes representing single ICD-10 code. At times it requires multiple ICD-9 codes combined to reproduce the complete meaning of one ICD-10 code. Mapping Types: "Single Code-to-Single Code", "Single Code-to-Cluster", "Cluster-to-Single Code". Note: More than one ICD-9 code (cluster) may be a valid translation of a given ICD-10 code. Which one of those ICD-9 codes (clusters) is the most correct translation must be determined based on the clinical case.

ICD-10 H4020X1 (Diagnosis) to ICD-9 Mapping Options

Source ICD-10 Mapping Type Target ICD-9
Recommended Mapping (based on statistical analysis)
H4020X1 (Diagnosis) - Unspecified primary angle-closure glaucoma, mild stage Single To Single 36520 (Diagnosis) - Prim angl-clos glauc NOS (Primary angle-closure glaucoma, unspecified)
CMS/CDC General Equivalence Mappings
H4020X1 (Diagnosis) - Unspecified primary angle-closure glaucoma, mild stage Single To Single Alternative #1: 36520 (Diagnosis) - Prim angl-clos glauc NOS (Primary angle-closure glaucoma, unspecified)
Single To Cluster Cluster #1:
36520 (Diagnosis) - Prim angl-clos glauc NOS (Primary angle-closure glaucoma, unspecified)
with
36571 (Diagnosis) - Mild stage glaucoma