2006 ICD-9-CM Volume 1 Diagnosis Codes Home > Symptoms, Signs, And Ill-Defined Conditions 780-799 > Symptoms 780-789 > 2006 ICD-9-CM Diagnosis 784 Symptoms involving head and neck View the most recent version of ICD-9-CM 784 784 is a non-specific code that cannot be used to specify a diagnosis 784 Excludes encephalopathy NOS (348.30) specific symptoms involving neck classifiable to 723 (723.0-723.9)