ICD-9-CM (clinical modification) codes are the US version of the World Health Organization's International Classification of Diseases version 9 used in medical billing and coding to describe diseases, injuries, symptoms and conditions.
ICD-9-CM 355.9 is one of thousands of ICD-9-CM codes used in healthcare. Although ICD-9-CM and CPT (clinical procedural terminology) codes are largely numeric, they differ in that CPT codes describe medical procedures and services.
ICD-9-CM codes will be replaced by ICD-10-CM codes in October of 2014.
Billable medical code that can be used on a reimbursement claim.
Non-Billable medical code
General Equivalent Mapping (GEM) of ICD-9-CM to ICD-10-CM