H18.6 — Keratoconus

Not billable

Is H18.6 billable?

No — H18.6 is a non-billable header code. H18.6 groups more specific codes and cannot be submitted on a claim. A valid ICD-10-CM code must be reported at the highest level of specificity available in its branch. Select one of the 12 billable codes beneath H18.6.

Billable codes under this header

H18.6 at a glance

Code	H18.6
Description	Keratoconus
Billable	No — header code
Code set	ICD-10-CM FY2027
Valid for encounters	October 1, 2026 – September 30, 2027

Excludes2 — not included here — inherited from Chapter 7

The conditions below are not part of H18.6, but a patient may have both at the same time. When documentation supports it, H18.6 and the excluded code may both be reported.

certain conditions originating in the perinatal period (P04-P96)
certain infectious and parasitic diseases (A00-B99)
complications of pregnancy, childbirth and the puerperium (O00-O9A)
congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)
diabetes mellitus related eye conditions (E09.3-, E10.3-, E11.3-, E13.3-)
endocrine, nutritional and metabolic diseases (E00-E88)
injury (trauma) of eye and orbit (S05.-)
injury, poisoning and certain other consequences of external causes (S00-T88)
neoplasms (C00-D49)
symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
syphilis related eye disorders (A50.01, A50.3-, A51.43, A52.71)

What codes fall under H18.6? (3)

How long has H18.6 existed?

H18.6 has been in ICD-10-CM since at least FY2016, the earliest fiscal year on record here.

Derived from the official order files for FY2016–FY2026. FY2017 and FY2020 publish no order file, so those years are not covered.