Corrosion of unsp degree of back of left hand, subs encntr

This code indicates a chemical burn (corrosion) of an unspecified severity affecting the back of the patient's left hand. The "subsequent encounter" designation means the patient is receiving follow-up care for this injury after the initial treatment.

Apply this code when documenting ongoing management, such as wound care, dressing changes, or monitoring for complications, for a chemical burn to the dorsal aspect of the left hand. This is appropriate after the initial diagnosis and treatment have been rendered.

• Ensure the documentation specifies "corrosion" (chemical burn) rather than a thermal burn.
• Verify the laterality (left hand) and anatomical site (back of hand) are clearly documented.
• Confirm the encounter is for follow-up care, not the initial treatment, to justify the "D" seventh character.