Effects of weightlessness, sequela

This code signifies long-term or residual health problems that arise from a prior exposure to weightlessness or microgravity. These sequelae can manifest as persistent physiological changes affecting various body systems, such as bone density, muscle mass, cardiovascular function, or neurological equilibrium, long after the individual has returned to a normal gravitational environment.

Use this code when documenting conditions that are directly attributed to a past experience of weightlessness, such as chronic osteoporosis in astronauts, persistent vestibular dysfunction, or long-term cardiovascular deconditioning. It is appropriate for follow-up care or evaluations where the primary issue is a lasting consequence of spaceflight or prolonged microgravity exposure.

• Always use in conjunction with a code describing the specific sequela (e.g., M81.0 for age-related osteoporosis).
• Ensure documentation clearly links the current condition to a history of weightlessness.
• The "S" in the seventh character indicates sequela, meaning the residual effect of a past condition.