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H10.422

H10.422: Simple chronic conjunctivitis, left eye

Billable / specific codeICD-10-CMleft

H10.422 is a billable, specific ICD-10-CM code for simple chronic conjunctivitis, left eye. It is valid for submission on a claim.

Check H10.422 with the rest of the claim: free scrubber

Excludes1 inherited from the categories above H10.422

A category’s note binds every code beneath it.

Written on H10: Conjunctivitis

  • keratoconjunctivitis (H16.2-)

Risk adjustment

No CMS-HCC V28 category: this code does not change a RAF score.

Medicare coverage

H10.422 is named in 3 Medicare coverage policies: 3 listing it as supporting medical necessity. Which one applies depends on your Medicare contractor.

  • A57044Billing and Coding: Removal of Benign Skin Lesions
  • A57068Billing and Coding: Ocular Photography - External
  • A57284Billing and Coding: Nasal Punctum-Nasolacrimal Duct Dilation and Probing with or without Irrigation

Code history

Unchanged in every release from FY2024 to FY2027.

Other codes under H10.42

ICD-10-CMFY2027· effective October 1, 2026

Loaded directly from the CMS/NCHS ICD-10-CM public-domain release: see data sources and our editorial policy. If this page disagrees with the CMS tabular list, this page is wrong. Reference information for professional coders; not medical or billing advice.