2008 ICD-9-CM Volume 1 Diagnosis Codes Home > Injury And Poisoning 800-999 > Other And Unspecified Effects Of External Causes 990-995 > Certain Adverse Effects Not Elsewhere Classified 995.* > 2008 ICD-9-CM Diagnosis 995.86 Malignant hyperthermia  On October 1, 2008 the 2009 ICD-9-CM codes came into effect. Therefore, this code may be out of date. The 2009 version of ICD-9-CM 995.86 can be accessed here. Rapid and excessive rise of temperature accompanied by muscular rigidity following general anesthesia. 995.86 is a specific code that can be used to specify a diagnosis 995.86 contains 2 index entries View the ICD-9-CM Volume 1 995.* hierarchy ICD9Data's sister site ProcedureCodes.com launches with the 2008/09 CPT® codes - read more on the ICD9Data.com blog. 995.86 also known as: Malignant hyperpyrexia due to anesthesia Index entries containing 995.86: Hyperpyrexia 780.6 malignant, due to anesthetic 995.86 Hyperthermia (of unknown origin) (see also Pyrexia) 780.6 malignant (due to anesthesia) 995.86