The ICD-9 code for hypoglycemia is E16.2, according to ICD9Data.com. Hypoglycemia occurs in people who take medication for diabetes, and it is more commonly known as low blood sugar, according to WebMD.
ICD-9 refers to the International Classification of Diseases, Ninth Revision, which is the current version of the classification system as of 2014. The Center for Disease Control and Prevention describes the ICD as the official system of classification of the health care industry. It provides a standardized system of classifying diseases and medical conditions to aid in the collection and processing of statistical information on an international basis.
The CDC states that the World Health Organization oversees the ICD and occasionally revises the classification, making adjustments as necessary. As of 2014, the ICD is in the process of revising the current ICD-9 classification system, to be replaced by ICD-10.