2006 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.* > 2006 ICD-9-CM Diagnosis 995.2 Unspecified adverse effect of drug medicinal and biological substance not elsewhere classified View the most recent version of ICD-9-CM 995.2 Immunologically mediated adverse reactions to medicinal substances used legally or illegally. 995.2 is a specific code that can be used to specify a diagnosis 995.2 contains 18 index entries View the ICD-9-CM Volume 1 995.* hierarchy Alternate Terminology Adverse effect to correct medicinal substance properly administered Allergic reaction to correct medicinal substance properly administered Hypersensitivity to correct medicinal substance properly administered Idiosyncrasy due to correct medicinal substance properly administered Drug: hypersensitivity NOS reaction NOS 995.2 Excludes pathological drug intoxication (292.2)