359 Muscular dystrophies and other myopathies (359.0-359.9) ICD-9-CM
The 359.0-359.9 block classified 359 muscular dystrophies and other myopathies with 16 legacy diagnosis codes. None remain valid for claim submission; each code below links to its reference page with the official ICD-10-CM replacement under the CMS General Equivalence Mappings.
Retired Code Set
ICD-9-CM stopped being valid for U.S. claims with dates of service on or after October 1, 2015, when ICD-10-CM replaced it. Use this index for historical lookups and crosswalking; for current coding, start from the ICD-10-CM codes list or the ICD-9 / ICD-10 converter.
Legacy Codes in the 359.0-359.9 Block 16 codes
None of these codes remain valid for claim submission. Each code page shows its ICD-10-CM replacement under the CMS General Equivalence Mappings.
- 359.0 Cong hered musc dystrphy
- 359.1 Hered prog musc dystrphy
- 359.21 Myotonic musclr dystrphy
- 359.22 Myotonia congenita
- 359.23 Myotonic chondrodystrphy
- 359.24 Drug induced myotonia
- 359.29 Myotonic disorder NEC
- 359.3 Periodic paralysis
- 359.4 Toxic myopathy
- 359.5 Myopathy in endocrin dis
- 359.6 Infl myopathy in oth dis
- 359.71 Inclusion body myositis
- 359.79 Inflm/immune myopath NEC
- 359.81 Critical illness myopthy
- 359.89 Myopathies NEC
- 359.9 Myopathy NOS
Questions About This Page
Are the 359.0-359.9 codes still billable?
No. Every code in this block became invalid for U.S. claims after September 30, 2015. Each code page linked above shows the ICD-10-CM replacement CMS assigned in the General Equivalence Mappings, and the ICD-9 / ICD-10 converter translates any of them directly.
What did the 359.0-359.9 block classify?
The block classified 359 muscular dystrophies and other myopathies with 16 codes in the final ICD-9-CM release. It sat under Diseases of the nervous system (320–359) in the legacy hierarchy.
Related References
Source: final CMS ICD-9-CM release (version date October 1, 2014). Retired from U.S. claims after September 30, 2015.
