ICD-10-CM > M00-M99 > M65-M67 > M67 > M67.2 > M67.25 M67.25 Synovial hypertrophy, not elsewhere classified, thigh Non-Billable/Non-Specific Codes M67.251Synovial hypertrophy, not elsewhere classified, right thighM67.252Synovial hypertrophy, not elsewhere classified, left thighM67.259Synovial hypertrophy, not elsewhere classified, unspecified thigh