2007 ICD-9-CM Procedure 99.1 Injection or infusion of therapeutic or prophylactic substance 99.1 is a non-specific code that should not be used to specify a procedure View the full Volume 3 99.* hierarchy 99.1 includes: injection or infusion given: hypodermically acting locally or systemically intramuscularly acting locally or systemically intravenously acting locally or systemically