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.
Risk adjustment
H10.422 does not map to an HCC and does not risk-adjust under CMS-HCC V28. That is normal — most ICD-10 codes do not. It still needs to be coded correctly; it just will not move a RAF score.
Medicare coverage
H10.422 is named in 3 Medicare coverage policies — 3 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.
- 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
H10.422 has not changed since FY2024 — no addition, revision or deletion across the three most recent ICD-10-CM releases.
Related codes at this level
Codes that share H10.42. If H10.422 is not quite right, the correct code is usually one of these.
Questions about H10.422
- Is H10.422 a billable ICD-10-CM code?
- Yes. H10.422 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
- Where does H10.422 sit in the tabular list?
- Diseases of the eye and adnexa (H00-H59), in the block Disorders of conjunctiva (H10-H11).