H15.842 Scleral ectasia, left eye

ICD-10-CM Code H15.842: Scleral ectasia, left eye

ICD-10-CM code H15.842 identifies scleral ectasia of the left eye, classified as a disease or syndrome with an active status for the 2026 edition. It is a specific concept nested under the broader parent code for scleral ectasia. General clinical literature discusses corneal ectasia, including keratoconus, but does not explicitly contrast it with this code. 1 2 3

Plain-language overview

Code H15.842 identifies a condition called scleral ectasia affecting the left eye, and the terminology record classifies this concept as a disease or syndrome. 1

What this code represents

The official display label for ICD-10-CM code H15.842 is scleral ectasia, left eye, and the terminology record indicates this code currently holds an active status. 1

Code H15.842 is a narrower concept nested under the parent concept H15.84, which represents the general diagnosis of scleral ectasia within the terminology hierarchy. 1

Coding details

The terminology record for H15.842 includes a published abbreviation matching the preferred name, and the code is listed within the 2026 version of the ICD-10-CM system. 1 3

Documentation considerations

The terminology record for H15.842 explicitly specifies the left eye and the disease or syndrome classification, establishing the core elements of this diagnosis concept. 1

What the sources add

While S1 defines the target diagnosis, S2 provides general clinical context by identifying keratoconus as a primary corneal ectasia, though it does not explicitly contrast this with scleral ectasia. 1 2

Both S1 and S3 confirm the official terminology and 2026 version designation for code H15.842, while S3 additionally provides a release date of January 1, 2026. 1 3

Coverage and utilization context

A clinical review discusses scleral lenses as an intervention for corneal ectasia, but the supplied sources do not establish payer coverage or utilization rules for code H15.842. 2

Questions to verify

The supplied sources do not establish the specific clinical symptoms, underlying causes, diagnostic criteria, or treatment protocols for scleral ectasia of the left eye. 1 2 3

Sources

1. ICD-10-CM H15.842 terminology record — National Cancer Institute Enterprise Vocabulary Services; accessed 2026-07-27.
2. Long-Term Effectiveness of Scleral Lens Treatment in the Management of Keratoconus: A Systematic Review — pmc.ncbi.nlm.nih.gov; accessed 2026-07-27.
3. EVS Explore — evsexplore.semantics.cancer.gov; accessed 2026-07-27.