H21.533 Iridodialysis, bilateral

ICD-10-CM Code H21.533: Iridodialysis, bilateral

ICD-10-CM code H21.533 represents a diagnosis of bilateral iridodialysis. The code is identified as a billable and specific code valid for reimbursement purposes. Public sources map this diagnosis to standardized terminology and include it within Medicare billing and coding articles. Clinical literature discusses imaging methods for evaluating iridodialysis to assist with surgical planning. 2 5 3 1

Plain-language overview

The ICD-10-CM code H21.533 is designated for the diagnosis of iridodialysis when the condition is bilateral. This code is listed alongside other specific codes for unilateral presentations, such as iridodialysis of the left eye. 2 4

What this code represents

Code H21.533 is identified as a billable and specific code that is valid for reimbursement. The designation of this code in the ICD-10-CM system provides a formal classification for bilateral iridodialysis. 5 2

Coding details

The code H21.533 is situated within the ICD-10-CM chapter range starting with H00. Adjacent codes in this classification structure include H21.532 for iridodialysis of the left eye and H21.539 for iridodialysis of an unspecified eye. 4 5

Documentation considerations

The existence of separate codes for bilateral, left eye, and unspecified iridodialysis establishes distinct diagnostic categories based on laterality. The presence of these specific codes allows documentation to differentiate bilateral cases from unilateral or unspecified presentations. 2 4

Coverage and utilization context

Code H21.533 appears in a Centers for Medicare and Medicaid Services article concerning billing and coding for cataract extraction. The inclusion of this diagnosis code in the article links it to administrative documentation for this specific procedure type. 3

Clinical context

Anterior segment optical coherence tomography has enabled precise visualization of iridodialysis. This imaging modality has been used to facilitate meticulous surgical planning and effective postoperative assessment in cases of traumatic iridodialysis. 1

What the sources add

Clinical evidence from medical literature describes the use of anterior segment optical coherence tomography for the visualization and surgical planning of iridodialysis, while coding sources establish the billable status and reimbursement validity of the H21.533 code. 1 5

A terminology mapping source links the ICD-10-CM code H21.533 to the SNOMEDCTUS concept 45953007. This mapping connects the bilateral iridodialysis diagnosis code to standardized clinical terminology systems. [2](https://evsexplore.semantics.cancer.gov/evsexplore/concept/snomedctus/45953007)

Sources

1. Clinical application of anterior segment optical coherence tomography in ocular emergencies: A comprehensive review — pmc.ncbi.nlm.nih.gov; accessed 2026-07-25.
2. EVS Explore — evsexplore.semantics.cancer.gov; accessed 2026-07-25.
3. Article - Billing and Coding: Cataract Extraction (including Complex Cataract Surgery) (A56615) — cms.gov; accessed 2026-07-25.
4. H21.532 — Iridodialysis, left eye | ICD-10 Code · Eleplan — eleplan.com; accessed 2026-07-25.
5. H21.533 — Iridodialysis, bilateral | ICD-10 Code · Eleplan — eleplan.com; accessed 2026-07-25.
6. H21.533 - Iridodialysis, bilateral | ICD-10-CM — unboundmedicine.com; accessed 2026-07-25.