Toxic effect of formaldehyde, assault, subsequent encounter

This code signifies a toxic reaction to formaldehyde exposure that occurred as a result of an assault, and the patient is now receiving follow-up care for the effects of that exposure. This could involve ongoing treatment for respiratory issues, skin irritation, or other systemic effects stemming from the initial harmful contact.

Apply this code when documenting a patient's subsequent visit for conditions directly attributable to formaldehyde poisoning, where the poisoning was intentionally inflicted by another person. This includes follow-up appointments for monitoring, medication adjustments, or rehabilitation related to the assault-induced toxic effect.

• Ensure documentation clearly states the formaldehyde exposure was due to an assault and that this is a follow-up encounter.
• Always sequence this code after the primary diagnosis describing the specific manifestation of the toxic effect (e.g., acute bronchitis, dermatitis).
• Do not use for initial encounters; a different 7th character would be appropriate for the initial phase of care.