Adverse effect of smallpox vaccines, sequela

This code signifies a long-term or residual condition resulting from an adverse reaction to a smallpox vaccine. It indicates that the initial acute adverse effect has resolved, but a lasting health problem remains directly attributable to the vaccine.

Apply this code when documenting a chronic or permanent sequela, such as scarring, chronic pain, or neurological deficits, that developed as a consequence of an adverse event following smallpox vaccination. This code is appropriate when the patient is presenting for treatment or evaluation of this persistent condition.

• Always sequence this code after the code for the specific sequela (e.g., a code for scar, chronic dermatitis, or neurological disorder).
• Ensure documentation clearly links the current condition as a direct, long-term consequence of the smallpox vaccine.
• Do not use this code for acute adverse reactions; use the appropriate acute adverse effect code for those scenarios.