ICD-10 H542X21 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 H542X21 (Diagnosis) to ICD-9 Mapping Options

Source ICD-10	Mapping Type	Target ICD-9
Recommended Mapping (based on statistical analysis)
H542X21 (Diagnosis) - Low vision r eye category 2, low vision left eye category 1 (Low vision right eye category 2, low vision left eye category 1)	Single To Single	36920 (Diagnosis) - Low vision, 2 eyes NOS (Moderate or severe impairment, both eyes, impairment level not further specified)
CMS/CDC General Equivalence Mappings
H542X21 (Diagnosis) - Low vision r eye category 2, low vision left eye category 1 (Low vision right eye category 2, low vision left eye category 1)	Single To Single	Alternative #1: 36920 (Diagnosis) - Low vision, 2 eyes NOS (Moderate or severe impairment, both eyes, impairment level not further specified)
	Single To Single	Alternative #2: 36924 (Diagnosis) - One eye-moderate/oth-sev (Better eye: moderate vision impairment; lesser eye: severe vision impairment)