Advrs effect of pertuss vaccine, inc combin w pertuss, sqla

This code signifies a long-term or residual health problem that has resulted from an adverse reaction to a pertussis-containing vaccine. This includes vaccines that combine pertussis with other components, such as DTaP or Tdap. The adverse effect is no longer acute but has left a lasting impact on the patient's health.

Use this code when documenting a chronic condition or permanent injury directly attributable to a past adverse reaction to a pertussis vaccine. Examples include persistent neurological deficits, chronic allergic reactions, or other lasting sequelae. This code is appropriate when the acute phase of the adverse event has resolved, but its effects continue.

• Always sequence this code after the code describing the specific sequela (e.g., a code for chronic encephalopathy).
• Ensure documentation clearly links the current chronic condition to a previous pertussis vaccine adverse event.
• Do not use this code for acute adverse reactions; instead, use the appropriate acute adverse effect code from the T50.A1- series.