I.C.13

Chapter 13: Diseases of the Musculoskeletal System and Connective

In this section

I.C.13.aSite and laterality
I.C.13.bAcute traumatic versus chronic or recurrent musculoskeletal conditions
I.C.13.cCoding of Pathologic Fractures
I.C.13.dOsteoporosis
I.C.13.eMultisystem Inflammatory Syndrome

ICD-10-CM Official Guidelines for Coding and Reporting, FY 2026 (effective October 1, 2025). Published by CMS and NCHS. Reproduced for reference — always verify against the official CMS release.