Partial traumatic MCP amputation of left thumb, sequela

This code signifies a partial traumatic amputation of the left thumb at the metacarpophalangeal (MCP) joint level, indicating that some portion of the thumb distal to this joint was lost due to an injury. The "sequela" seventh character specifies that this code is used for complications or conditions that arise as a direct result of the initial amputation, occurring after the acute phase of the injury has passed.

This code is appropriate for documenting long-term effects or complications stemming from a previous partial traumatic amputation of the left thumb at the MCP joint. Examples include chronic pain, nerve damage, non-union of bone fragments, or functional limitations directly attributable to the old injury. It should be used when the patient is presenting for treatment of these lasting consequences, not for the initial injury.

• Always ensure the documentation clearly specifies "left thumb" and "metacarpophalangeal" joint involvement.
• The "S" seventh character for sequela is crucial and indicates that this is a late effect of the original injury.
• Do not use this code for the initial acute injury; instead, use the appropriate acute injury code with the correct seventh character for initial encounter, subsequent encounter, or sequela, depending on the phase of care.