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H10.42

Non-billable

Simple chronic conjunctivitis

H10.42 is the ICD-10-CM code for Simple chronic conjunctivitis. It is a non-billable category code — use a more specific child code such as H10.421 for billing.

Status
Header (non-billable)
Chapter
H00-H59
Parent
H10.4
Subcodes
4
Edition
FY2026

H00-H59 Diseases of the eye and adnexa

No additional coding notes for this code.

Frequently asked questions

What is ICD-10 code H10.42?
H10.42 is the ICD-10-CM code for "Simple chronic conjunctivitis". It falls under H00-H59 Diseases of the eye and adnexa.
Is H10.42 a billable code?
No — H10.42 is a non-billable header code. Use a more specific child code (such as H10.421) for billing.
What are the subcodes of H10.42?
H10.42 has 4 more specific child codes, including H10.421, H10.422, H10.423.

Source: CMS ICD-10-CM FY2026. For informational purposes only — not medical advice. See our medical disclaimer.

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