H44.40 Unspecified hypotony of eye

ICD-10-CM Code H44.40: Unspecified hypotony of eye

ICD-10-CM code H44.40 designates an unspecified hypotony of eye. The terminology record is active and classifies this concept as a disease or syndrome. It is a billable, specific code valid for reimbursement, situated under the parent category H44.4 for hypotony of eye. This reference summarizes public terminology records. 1 5

Plain-language overview

ICD-10-CM code H44.40 carries the official descriptor unspecified hypotony of eye, providing a standardized diagnostic label for this clinical concept within medical terminology systems. 1 3

What this code represents

The terminology record classifies the H44.40 concept with the semantic type of disease or syndrome, establishing its fundamental nature within the diagnostic vocabulary framework. 1

Code H44.40 is a narrower concept under the parent code H44.4, which broadly covers the category of hypotony of eye diagnoses within the ICD-10-CM hierarchy. 1

Coding details

Code H44.40 holds an active record status and exists as a narrower concept under the parent code H44.4, which broadly covers hypotony of eye diagnoses. 1

The H44.40 code is identified as a billable, specific code valid for reimbursement purposes, according to external coding reference materials that list its operational status. 5

Documentation considerations

Clinical navigation portals list alternate codes such as H44.441 for primary hypotony of the right eye, which provides specific lateralized options within the same broader coding category. 4

The official descriptor for H44.40 includes the term unspecified, which is explicitly established in the terminology record alongside its parent hierarchy and active status. 1

What the sources add

While official terminology sources define the active status and hierarchical parent of H44.40, external coding references add the operational context that this specific code is billable for reimbursement. 1 5

Official vocabulary services confirm the H44.40 code descriptor across different system versions and release dates, whereas clinical navigation portals demonstrate its placement alongside more specific lateralized codes. 2 4

Sources

1. ICD-10-CM H44.40 terminology record — National Cancer Institute Enterprise Vocabulary Services; accessed 2026-07-27.
2. EVS Explore — evsexplore.semantics.cancer.gov; accessed 2026-07-27.
3. Browse Code Systems — vsac.nlm.nih.gov; accessed 2026-07-27.
4. H44.44 - Primary hypotony of eye | ICD-10-CM — unboundmedicine.com; accessed 2026-07-27.
5. H44.40 — Unspecified hypotony of eye | ICD-10 Code · Eleplan — eleplan.com; accessed 2026-07-27.