ICD-9-CM Diagnosis Code 359.29
Diagnosis Code: 359.29 (Raw: 35929)
Description: Other specified myotonic disorder
Classification: International Classification of Diseases, Ninth Revision, Clinical Modification (ICD-9-CM)
Fiscal Year: 2026 Reference
CMS Section 111 Status: Valid for reporting.
Overview & Historical Usage
ICD-9-CM code 359.29 is designated for Other specified myotonic disorder. While superseded by ICD-10 for current healthcare encounters, it remains a recognized reference code for CMS Section 111 reporting, legacy claims adjudication, and historical clinical data analysis.