ICD-10 Code H05.242 – Constant exophthalmos, left eye (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H05.242 – Constant exophthalmos, left eye
What it is
H05.242 identifies a persistent forward protrusion of the left eyeball. Use it when the chart documents constant exophthalmos affecting only the left eye.
Clinical signs
Typical findings include visible unilateral eye prominence, eyelid retraction, or incomplete lid closure. Clinical features vary; refer to documentation.
When to use this code
Use this code when the provider clearly documents constant exophthalmos of the left eye. It may appear in records describing orbital disease, thyroid eye disease, or other causes, but you should code only what is documented.
If the note states proptosis without laterality, or if the condition is intermittent rather than constant, Check documentation before assigning H05.242.
Do not use for
Do not use this code for right eye, bilateral, or unspecified exophthalmos. Avoid it when the chart describes a different orbital abnormality or does not confirm persistence.
Coding tip
Confirm both laterality and the word “constant” in the provider note before coding H05.242.