H16.309 — Unspecified interstitial keratitis, unspecified eye
H16.309 is a billable, specific ICD-10-CM code for unspecified interstitial keratitis, unspecified eye. It is valid for submission on a claim.
Risk adjustment
H16.309 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
H16.309 is named in 1 Medicare coverage policy — 1 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.
- A57637Billing and Coding: Visual Field Examination
How H16.309 is indexed
Coders do not find codes by browsing the tabular list — they look them up in the alphabetic index, under the word the physician wrote. These are the index entries that lead here, so you can see which chart wordings map to H16.309.
- Keratitis›deep
Related codes at this level
Codes that share H16.30. If H16.309 is not quite right, the correct code is usually one of these.
Questions about H16.309
- Is H16.309 a billable ICD-10-CM code?
- Yes. H16.309 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
- Where does H16.309 sit in the tabular list?
- Diseases of the eye and adnexa (H00-H59), in the block Disorders of sclera, cornea, iris and ciliary body (H15-H22).