H16.0 – Corneal ulcer

ICD-10-CM 2027 diagnosis code · Disorders of sclera, cornea, iris and ciliary body

Non-billable header

ICD-10-CM code H16.0

Code: H16.0 (claims format: H160)
Description: Corneal ulcer
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
Parent codes: H16

Billable codes under H16.0

H16.0 is a header code and cannot be used on claims. Choose the most specific code:

H16.00 – Unspecified corneal ulcerHeader (more codes below)
H16.01 – Central corneal ulcerHeader (more codes below)
H16.02 – Ring corneal ulcerHeader (more codes below)
H16.03 – Corneal ulcer with hypopyonHeader (more codes below)
H16.04 – Marginal corneal ulcerHeader (more codes below)
H16.05 – Mooren's corneal ulcerHeader (more codes below)
H16.06 – Mycotic corneal ulcerHeader (more codes below)
H16.07 – Perforated corneal ulcerHeader (more codes below)

Related codes in H16

H16.1 – Other and unspecified superficial keratitis without conjunctivitisHeader
H16.2 – KeratoconjunctivitisHeader
H16.3 – Interstitial and deep keratitisHeader
H16.4 – Corneal neovascularizationHeader
H16.8 – Other keratitisBillable
H16.9 – Unspecified keratitisBillable

Frequently asked questions

What is ICD-10 code H16.0?

H16.0 is the ICD-10-CM code for corneal ulcer, in the block H15-H22 (Disorders of sclera, cornea, iris and ciliary body).

Is H16.0 a billable code?

No. H16.0 is a header code with more specific child codes; report one of the billable codes listed above.

What category does H16.0 belong to?

It belongs to category H16 – Keratitis.

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.