Contaminated med/biolog sub, injected or used for immuniz

This code signifies an adverse event where a patient has been exposed to a medical or biological substance that was contaminated, and this substance was administered via injection or used for immunization. It indicates that the contamination of the substance itself, rather than the injection procedure, is the primary issue leading to the patient's condition. This can result in various infections or adverse reactions depending on the nature of the contaminant.

Use this code when documentation clearly indicates a patient's illness or adverse reaction is directly attributable to a contaminated vaccine, medication, or biological product administered parenterally. This applies to situations where the substance itself was impure or contained unintended pathogens/substances prior to administration. Examples include bacterial contamination of a multi-dose vial or a vaccine containing an unintended viral agent.

• Always sequence this code as a secondary diagnosis, following the code for the specific condition or infection resulting from the contamination.
• Ensure documentation specifies the substance was "contaminated" and administered via "injection" or "immunization" to justify this code.
• Do not use for adverse effects of correctly administered, non-contaminated substances; use codes from T36-T50 for those scenarios.