Prolonged stay in weightless environment, sequela

This code describes the long-term or residual effects resulting from an extended period spent in a weightless environment, such as during space travel. These sequelae can manifest as various physiological changes that persist after the individual has returned to a normal gravitational setting.

This code is appropriate for documenting conditions like chronic bone density loss, persistent muscle atrophy, or lasting cardiovascular deconditioning that are directly attributable to prolonged exposure to microgravity. It should be used when the acute effects of the weightless environment have resolved, but the patient continues to experience related health issues.

• Always use this code as a secondary diagnosis, following the code for the specific sequela being treated (e.g., M81.0 for osteoporosis).
• Ensure documentation clearly links the current condition to a history of prolonged weightless exposure.
• This code requires a 7th character for sequela (S).