ICD-10-CM > M00-M99 > M20-M25 > M25 > M25.6 > M25.61 M25.61 Stiffness of shoulder, not elsewhere classified Non-Billable/Non-Specific Codes M25.611Stiffness of right shoulder, not elsewhere classifiedM25.612Stiffness of left shoulder, not elsewhere classifiedM25.619Stiffness of unspecified shoulder, not elsewhere classified