Toxic effect of phosphorus and its compounds, undet, subs

This code signifies a toxic reaction to phosphorus or its various compounds, where the intent (e.g., accidental, intentional self-harm, assault) of the exposure is not yet determined. It is used when the patient is receiving active treatment for the toxic effect after the initial phase of care.

Apply this code for follow-up encounters, such as subsequent hospital visits, clinic appointments, or ongoing treatment, for a patient experiencing adverse effects from phosphorus exposure. This is appropriate when the circumstances surrounding the exposure remain unclear or are under investigation.

• Always sequence this code after the primary diagnosis for the specific manifestation of the toxic effect.
• Ensure the "D" seventh character is appropriate for subsequent care; do not use for initial or sequela encounters.
• Review medical record documentation carefully for any clarification on the intent of exposure to determine if a more specific intent code can be assigned.