Oth acute reaction to foreign sub acc left dur proc, sequela

This code signifies a long-term or late-developing adverse effect resulting from a foreign substance inadvertently retained in the body following a medical procedure. This reaction is acute in nature, meaning it presents suddenly and severely, but the code specifically captures the sequelae, or residual effects, of that initial acute reaction.

Use this code when documenting a patient presenting with a current, chronic, or residual condition directly attributable to an acute inflammatory or allergic reaction to a foreign object or substance left inside the body during a prior surgical or medical intervention. Examples include chronic pain, adhesions, or organ dysfunction stemming from an acute reaction to a retained surgical sponge or instrument fragment.

• Requires a seventh character "S" to indicate sequela, meaning the initial acute reaction has resolved but its lasting effects are being treated.
• Do not use for initial acute reactions; those would be coded with the appropriate acute encounter seventh character.
• Always sequence this code after the code(s) for the specific manifestation(s) of the sequela (e.g., chronic pain, adhesion formation).