ICD-10-CM > M00-M99 > M20-M25 > M22 > M22.3 > M22.3X M22.3X Other derangements of patella Non-Billable/Non-Specific Codes M22.3X1Other derangements of patella, right kneeM22.3X2Other derangements of patella, left kneeM22.3X9Other derangements of patella, unspecified knee