ICD-10 M158 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 M158 (Diagnosis) to ICD-9 Mapping Options

Source ICD-10	Mapping Type	Target ICD-9
Recommended Mapping (based on statistical analysis)
M158 (Diagnosis) - Other polyosteoarthritis	Single To Single	71580 (Diagnosis) - Osteoarthrosis-mult site (Osteoarthrosis involving, or with mention of more than one site, but not specified as generalized, site unspecified)
CMS/CDC General Equivalence Mappings
M158 (Diagnosis) - Other polyosteoarthritis	Single To Single	Alternative #1: 71580 (Diagnosis) - Osteoarthrosis-mult site (Osteoarthrosis involving, or with mention of more than one site, but not specified as generalized, site unspecified)
	Single To Single	Alternative #2: 71589 (Diagnosis) - Osteoarthrosis-mult site (Osteoarthrosis involving, or with mention of more than one site, but not specified as generalized, multiple sites)