Other interstitial and deep keratitis, bilateral

This code describes inflammation of the corneal stroma or deep layers of the cornea, excluding specific types like interstitial keratitis due to herpes or syphilis. It indicates that both eyes are affected by this non-specific form of deep corneal inflammation.

Use this code when documentation specifies bilateral interstitial or deep keratitis that is not otherwise classified or attributed to a specific infectious agent. This applies to cases where the etiology is unknown or not explicitly stated as herpetic, syphilitic, or other specified causes.

• Ensure documentation clearly states "bilateral" involvement; otherwise, use the appropriate unilateral code.
• Always look for a more specific code if the underlying cause (e.g., herpes, syphilis) of the interstitial keratitis is identified.
• Do not confuse with superficial keratitis codes (H16.2-) or other specific forms of keratitis.