Underdosing of other bacterial vaccines, initial encounter

This code signifies a patient's underdosing of a bacterial vaccine not specified elsewhere, meaning they received less than the prescribed or recommended amount. This could be due to various reasons, such as patient non-compliance, administration error, or a supply issue, leading to incomplete or ineffective immunization.

This code is appropriate when documenting an initial encounter where a patient has received an insufficient dose of a bacterial vaccine, excluding those with more specific ICD-10-CM codes. Examples include a patient presenting for follow-up after self-administering a partial dose of a prescribed bacterial vaccine, or when an administration error resulted in a suboptimal dose.

• Always assign an additional code for the specific bacterial vaccine involved, if known.
• Consider an additional code for the adverse effect or complication, if any, resulting from the underdosing.
• Ensure the encounter is truly "initial" for this specific underdosing event; subsequent encounters would use a different seventh character.