H18.79 – Other corneal deformities

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

Non-billable header

ICD-10-CM code H18.79

Code: H18.79 (claims format: H1879)
Description: Other corneal deformities
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: H18 › H18.7

Billable codes under H18.79

H18.79 is a header code and cannot be used on claims. Choose the most specific code:

H18.791 – Other corneal deformities, right eyeBillable
H18.792 – Other corneal deformities, left eyeBillable
H18.793 – Other corneal deformities, bilateralBillable
H18.799 – Other corneal deformities, unspecified eyeBillable

Notes inherited from parent codes

Instructional notes at a category or block level apply to every code below it.

H18.7 – Other and unspecified corneal deformities

Excludes1 (not coded here):

congenital malformations of cornea (Q13.3-Q13.4)

Index terms for H18.79

Entries in the ICD-10-CM alphabetic index that lead to this code:

Related codes in H18.7

H18.70 – Unspecified corneal deformityBillable
H18.71 – Corneal ectasiaHeader
H18.72 – Corneal staphylomaHeader
H18.73 – DescemetoceleHeader

Frequently asked questions

What is ICD-10 code H18.79?

H18.79 is the ICD-10-CM code for other corneal deformities, in the block H15-H22 (Disorders of sclera, cornea, iris and ciliary body).

Is H18.79 a billable code?

No. H18.79 is a header code with more specific child codes; report one of the billable codes listed above.

What category does H18.79 belong to?

It belongs to category H18 – Other disorders of cornea.

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.