ICD-10-CM > R00-R99 > R20-R23 > R22 > R22.4 R22.4 Localized swelling, mass and lump, lower limb Non-Billable/Non-Specific Codes R22.40Localized swelling, mass and lump, unspecified lower limbR22.41Localized swelling, mass and lump, right lower limbR22.42Localized swelling, mass and lump, left lower limbR22.43Localized swelling, mass and lump, lower limb, bilateral