Underdosing of salicylates, subsequent encounter

This code signifies that a patient has experienced an adverse health event due to taking less than the prescribed or recommended dose of a salicylate medication. This underdosing is not accidental but rather a deliberate act or omission, leading to insufficient therapeutic effect or symptom recurrence.

This code is appropriate when a patient presents with worsening of a condition or new symptoms directly attributable to not taking enough of their salicylate medication, and this is not the initial encounter for the underdosing event. Examples include patients with chronic inflammatory conditions or cardiovascular disease whose symptoms return or worsen because they intentionally or unintentionally reduced their prescribed aspirin or other salicylate intake.

• Ensure documentation clearly indicates underdosing as the cause of the patient's current condition, not just non-compliance.
• Verify that this is a subsequent encounter for the underdosing event; initial encounters would use the 'A' seventh character.
• Confirm the medication involved is a salicylate; other medication classes for underdosing have different codes.