Constant exophthalmos, bilateral

This code signifies a persistent protrusion of both eyeballs from the orbits. It indicates a chronic, non-intermittent bulging of the eyes, affecting both sides of the face. This condition is often associated with underlying systemic diseases.

Apply this code when documentation clearly states "constant exophthalmos" affecting both eyes. It is appropriate for conditions like Graves' ophthalmopathy where bilateral, sustained proptosis is a hallmark. Documentation should specify the bilateral nature and chronicity of the exophthalmos.

• Differentiate from intermittent exophthalmos, which would require a different code.
• Ensure documentation specifies "bilateral" to support the use of this code.
• Always code the underlying cause of the exophthalmos first, if known and documented (e.g., thyroid eye disease).