H16 – Keratitis
ICD-10-CM 2027 diagnosis code · Disorders of sclera, cornea, iris and ciliary body
ICD-10-CM code
H16
- Code
H16(claims format:H16)- Description
- Keratitis
- Billable
- No – use a more specific code below
- Valid for
- Dates of service October 1, 2026 – September 30, 2027 (FY2027)
- Chapter
- 7. Diseases of the eye and adnexa (H00-H59)
- Block
- H15-H22 Disorders of sclera, cornea, iris and ciliary body
Billable codes under H16
H16 is a header code and cannot be used on claims. Choose the most specific code:
- H16.0 – Corneal ulcerHeader (more codes below)
- H16.1 – Other and unspecified superficial keratitis without conjunctivitisHeader (more codes below)
- H16.2 – KeratoconjunctivitisHeader (more codes below)
- H16.3 – Interstitial and deep keratitisHeader (more codes below)
- H16.4 – Corneal neovascularizationHeader (more codes below)
- H16.8 – Other keratitisBillable
- H16.9 – Unspecified keratitisBillable
Frequently asked questions
What is ICD-10 code H16?
H16 is the ICD-10-CM code for keratitis, in the block H15-H22 (Disorders of sclera, cornea, iris and ciliary body).
Is H16 a billable code?
No. H16 is a header code with more specific child codes; report one of the billable codes listed above.
Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.