Adverse effect of caffeine, initial encounter

This diagnosis code signifies a patient experiencing an undesirable or harmful reaction to the therapeutic or prescribed use of caffeine. These reactions are typically dose-dependent and can manifest as various physiological or psychological symptoms. It indicates that the caffeine was administered or consumed appropriately, but the patient still developed an adverse outcome.

Apply this code when a patient presents with symptoms such as palpitations, anxiety, insomnia, tremors, or gastrointestinal upset directly attributable to caffeine intake, and it's their first time seeking treatment for this specific adverse event. This includes reactions to caffeine in medications, supplements, or excessive consumption of caffeinated beverages.

• Ensure documentation clearly links the patient's symptoms to caffeine use and specifies it as an adverse effect, not poisoning.
• Confirm this is the initial encounter for this specific adverse effect; subsequent encounters would use a different seventh character.
• Always code the specific manifestation of the adverse effect (e.g., anxiety, tachycardia) as a primary diagnosis, with this code as a secondary diagnosis to indicate the cause.