Caisson disease, subsequent encounter

This code signifies a patient's ongoing care for decompression sickness, also known as caisson disease. This condition arises from rapid pressure changes, leading to gas bubble formation in tissues and blood, and can manifest with various symptoms affecting multiple organ systems.

Apply this code when a patient is receiving follow-up treatment, rehabilitation, or monitoring for previously diagnosed decompression sickness. This includes subsequent hyperbaric oxygen therapy sessions, management of residual neurological deficits, or ongoing evaluation of musculoskeletal or pulmonary complications.

• This "D" seventh character indicates a subsequent encounter, meaning the patient is receiving routine care during the healing or recovery phase.
• Do not use this code for the initial diagnosis or acute treatment of decompression sickness; refer to the appropriate "A" (initial encounter) code.
• Always code any associated manifestations or complications of decompression sickness separately and in addition to this code.