2026 ICD-10-CM Diagnosis Code H20Iridocyclitis

ICD-10-CM Codes›H00–H59›H15-H22›H20

ICD-10-CM H20
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

H20 is a non-billable ICD-10-CM category code for iridocyclitis, so it cannot be submitted on claims. Use a more specific code from this category instead, such as H20.00, H20.011, H20.012, and H20.013.

Code Identity

ICD-10-CM Code
H20
Billable Status
No — Non-Billable Category
Code Describes
Iridocyclitis
Chapter
H15-H22
Disorders of sclera, cornea, iris and ciliary body

Code Classification

ChapterH00–H59Diseases of the eye and adnexa
SectionH15-H22Disorders of sclera, cornea, iris and ciliary body
CategoryH20Iridocyclitis
This CodeH20Iridocyclitis

Specific Coding for IridocyclitisOverview

Non-specific codes like H20 require more characters. Use one of these billable codes instead:

  • H20.0 for Acute and subacute iridocyclitis

  • Use H20.00 for Unspecified acute and subacute iridocyclitis

  • H20.01 for Primary iridocyclitis

  • H20.02 for Recurrent acute iridocyclitis

  • H20.03 for Secondary infectious iridocyclitis

  • H20.04 for Secondary noninfectious iridocyclitis

  • H20.05 for Hypopyon

  • H20.1 for Chronic iridocyclitis

  • Use H20.10 for Chronic iridocyclitis, unspecified eye

  • Use H20.11 for Chronic iridocyclitis, right eye

  • Use H20.12 for Chronic iridocyclitis, left eye

  • Use H20.13 for Chronic iridocyclitis, bilateral

  • H20.2 for Lens-induced iridocyclitis

  • Use H20.20 for Lens-induced iridocyclitis, unspecified eye

  • Use H20.21 for Lens-induced iridocyclitis, right eye

  • Use H20.22 for Lens-induced iridocyclitis, left eye

  • Use H20.23 for Lens-induced iridocyclitis, bilateral

  • H20.8 for Other iridocyclitis

  • H20.81 for Fuchs' heterochromic cyclitis

  • H20.82 for Vogt-Koyanagi syndrome

  • Use H20.9 for Unspecified iridocyclitis

Clinical InformationClinical

  • Iridocyclitis

    acute or chronic inflammation of the iris and ciliary body characterized by exudates into the anterior chamber, discoloration of the iris, and constricted, sluggish pupil. symptoms include radiating pain, photophobia, lacrimation, and interference with vision.

  • Chronic Iridocyclitis|Chronic Uveitis

    uveitis that is usually insidious in onset, bilateral, and can be asymptomatic, most often affecting the anterior uveal tract, including the iris and ciliary body, and can result in long-term complications. it is most commonly associated with certain forms of juvenile idiopathic arthritis, but may occur independent of arthritis.

  • Iridocyclitis

    inflammation of the iris and the ciliary body.

Patient EducationClinical

Eye Diseases

Even if your eyes feel healthy, you could have a problem and not know it. That's why regular eye exams are so important. Refractive errors are the most common type of vision problem that makes it hard to see clearly. But some eye conditions or diseases don't have any symptoms and can lead to a permanent loss of vision.

The full article covers:

  • What diseases can affect the eye?
  • What are the symptoms of eye diseases?
  • Who is more likely to develop eye diseases?
  • What are the treatments for eye diseases?
  • Can eye diseases be prevented?

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About H20Overview

Is H20 (Iridocyclitis) a billable code?

No. This is a category header that groups the codes for iridocyclitis, and headers cannot be submitted on claims. Claims for iridocyclitis need a more specific code from this category, such as H20.00, H20.011, and H20.012.