H30.23 Posterior cyclitis, bilateral

ICD-10-CM H30.23: Posterior cyclitis, bilateral

ICD-10-CM code H30.23 designates a diagnosis of bilateral posterior cyclitis. It is a billable, specific code within the chapter for diseases of the eye and adnexa, under the subcategory for posterior cyclitis. Clinical literature indicates that posterior segment uveitis is often bilateral and chronic, and surgical interventions for posterior uveitis may yield varying clinical efficacies. 5 2 1

Plain-language overview

ICD-10-CM code H30.23 identifies a diagnosis of posterior cyclitis affecting both eyes. Clinical literature notes that inflammation involving the posterior segment of the eye is often bilateral and chronic. 5 2

What this code represents

The code H30.23 is a billable and specific diagnosis code with no child codes. It falls under category H30 for chorioretinal inflammation and subcategory H30.2 for posterior cyclitis. 5

H30.23 is listed in Chapter 7, Diseases of the eye and adnexa (H00-H59), within the block for Disorders of choroid and retina (H30-H36). The official label for this code is posterior cyclitis, bilateral. 5

Coding details

The reference data for H30.23 lists no inclusion terms. Additionally, no code first or use additional code instructions are listed for this specific diagnosis. 5

The subcategory H30.2 provides distinct codes for laterality, including H30.21 for the right eye, H30.22 for the left eye, and H30.23 for bilateral involvement. H30.20 is used for an unspecified eye. 6

Clinical context

Clinical research on uveitis patients indicates that those with posterior uveitis have the worst clinical efficacy with vitrectomy compared to patients with panuveitis. The literature suggests carefully considering the operation method for these patients. 1

Documentation considerations

Medical documentation for posterior uveitis may describe clinical findings such as vitritis, papilledema, and perivascular retinal whitening. The literature also associates posterior ocular segment involvement with poor visual prognosis. 2

What the sources add

While the ICD-10-CM reference provides the structural hierarchy and bilateral designation for H30.23, clinical studies contribute context regarding the chronic nature of posterior segment inflammation and the comparative outcomes of surgical interventions like vitrectomy. 5 1 2

Coverage and utilization context

The absence of code first and use additional code instructions is documented for H30.23. The available reference data does not establish payer-specific coverage rules or reimbursement guarantees for this diagnosis. 5

Sources

1. Analysis of Clinical Characteristics of 52 Patients with Uveitis before and after Vitrectomy and Factors Affecting Clinical Efficacy — pmc.ncbi.nlm.nih.gov; accessed 2026-07-25.
2. Uveitis as an Open Window to Systemic Inflammatory Diseases — pmc.ncbi.nlm.nih.gov; accessed 2026-07-25.
3. Phecode 371.1 · Cancer PRSweb — csg.sph.umich.edu; accessed 2026-07-25.
4. ICD-10 | Posterior cyclitis, left eye (H30.22) — cdek.pharmacy.purdue.edu; accessed 2026-07-25.
5. ICD-10-CM H30.23: Posterior cyclitis, bilateral | Vero — veroscribe.com; accessed 2026-07-25.
6. H30.2 — medcode.ch; accessed 2026-07-25.