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  3. H00–H59
  4. H15-H22
  5. Iridocyclitis (H20)

Iridocyclitis (H20)

Iridocyclitis (ICD-10 code H20) is a specific group of codes used to classify inflammation that affects both the iris and the ciliary body of the eye. These codes help document various types of iridocyclitis, including acute, chronic, infectious, noninfectious, and secondary causes. Each diagnosis can be further specified by laterality (right eye, left eye, bilateral, or unspecified).

The ICD-10 code for iridocyclitis encompasses several distinct conditions. For example, H20.00 includes idiopathic acute anterior uveitis and subacute iridocyclitis, guiding coders when no specific cause is identified. Primary cases (codes H20.011 to H20.019) cover iridocyclitis originating without underlying disease, while recurrent forms are captured under H20.02. Infectious forms listed under H20.03 include conditions caused by various pathogens, as highlighted by synonyms like Lyme uveitis or parasitic chorioretinitis. Noninfectious secondary iridocyclitis (codes starting with H20.04) includes drug-induced cases. Lens-induced iridocyclitis with possible complications such as postoperative inflammation is covered by H20.2. Specialized types like Fuchs' heterochromic cyclitis (H20.81) and Vogt-Koyanagi syndrome (H20.82) have their own subcodes. Overall, these codes serve to specify inflammation location, cause, and progression, aiding accurate clinical reporting and classification for eye inflammation disorders.

  • Diseases of the eye and adnexa (H00–H59)

    • Disorders of sclera, cornea, iris and ciliary body (H15-H22)

        • Iridocyclitis (H20)

        • H20 Iridocyclitis
        • H20.0 Acute and subacute iridocyclitis
        • H20.00 Unspecified acute and subacute iridocyclitis
        • H20.01 Primary iridocyclitis
        • H20.011 Primary iridocyclitis, right eye
        • H20.012 Primary iridocyclitis, left eye
        • H20.013 Primary iridocyclitis, bilateral
        • H20.019 Primary iridocyclitis, unspecified eye
        • H20.02 Recurrent acute iridocyclitis
        • H20.021 Recurrent acute iridocyclitis, right eye
        • H20.022 Recurrent acute iridocyclitis, left eye
        • H20.023 Recurrent acute iridocyclitis, bilateral
        • H20.029 Recurrent acute iridocyclitis, unspecified eye
        • H20.03 Secondary infectious iridocyclitis
        • H20.031 Secondary infectious iridocyclitis, right eye
        • H20.032 Secondary infectious iridocyclitis, left eye
        • H20.033 Secondary infectious iridocyclitis, bilateral
        • H20.039 Secondary infectious iridocyclitis, unspecified eye
        • H20.04 Secondary noninfectious iridocyclitis
        • H20.041 Secondary noninfectious iridocyclitis, right eye
        • H20.042 Secondary noninfectious iridocyclitis, left eye
        • H20.043 Secondary noninfectious iridocyclitis, bilateral
        • H20.049 Secondary noninfectious iridocyclitis, unspecified eye
        • H20.05 Hypopyon
        • H20.051 Hypopyon, right eye
        • H20.052 Hypopyon, left eye
        • H20.053 Hypopyon, bilateral
        • H20.059 Hypopyon, unspecified eye
        • H20.1 Chronic iridocyclitis
        • H20.10 Chronic iridocyclitis, unspecified eye
        • H20.11 Chronic iridocyclitis, right eye
        • H20.12 Chronic iridocyclitis, left eye
        • H20.13 Chronic iridocyclitis, bilateral
        • H20.2 Lens-induced iridocyclitis
        • H20.20 Lens-induced iridocyclitis, unspecified eye
        • H20.21 Lens-induced iridocyclitis, right eye
        • H20.22 Lens-induced iridocyclitis, left eye
        • H20.23 Lens-induced iridocyclitis, bilateral
        • H20.8 Other iridocyclitis
        • H20.81 Fuchs' heterochromic cyclitis
        • H20.811 Fuchs' heterochromic cyclitis, right eye
        • H20.812 Fuchs' heterochromic cyclitis, left eye
        • H20.813 Fuchs' heterochromic cyclitis, bilateral
        • H20.819 Fuchs' heterochromic cyclitis, unspecified eye
        • H20.82 Vogt-Koyanagi syndrome
        • H20.821 Vogt-Koyanagi syndrome, right eye
        • H20.822 Vogt-Koyanagi syndrome, left eye
        • H20.823 Vogt-Koyanagi syndrome, bilateral
        • H20.829 Vogt-Koyanagi syndrome, unspecified eye
        • H20.9 Unspecified iridocyclitis

Clinical Terms

The following clinical terms provide additional context, helping users better understand the clinical background and common associations for each diagnosis listed in this section. Including related terms alongside ICD-10-CM codes supports coders, billers, and healthcare professionals in improving accuracy, enhancing documentation, and facilitating research or patient education.

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.

Iritis

Inflammation of the iris characterized by circumcorneal injection, aqueous flare, keratotic precipitates, and constricted and sluggish pupil along with discoloration of the iris.

Ophthalmia, Sympathetic

Granulomatous uveitis which follows in one eye after a penetrating injury to the other eye; the secondarily affected eye is called the sympathizing eye, and the injured eye is called the exciting or activating eye.

Pars Planitis

Form of granulomatous uveitis occurring in the region of the pars plana. This disorder is a common condition with no detectable focal pathology. It causes fibrovascular proliferation at the inferior ora serrata.

Uveitis

Inflammation of part or all of the uvea, the middle (vascular) tunic of the eye, and commonly involving the other tunics (sclera and cornea, and the retina). (Dorland, 27th ed)

Uveitis, Anterior

Inflammation of the anterior uvea comprising the iris, angle structures, and the ciliary body. Manifestations of this disorder include ciliary injection, exudation into the anterior chamber, iris changes, and adhesions between the iris and lens (posterior synechiae). Intraocular pressure may be increased or reduced.

Uveitis, Intermediate

Inflammation of the pars plana, ciliary body, and adjacent structures.

Uveitis, Posterior

Inflammation of the choroid as well as the retina and vitreous body. Some form of visual disturbance is usually present. The most important characteristics of posterior uveitis are vitreous opacities, choroiditis, and chorioretinitis.

Uveitis, Suppurative

Intraocular infection caused mainly by pus-producing bacteria and rarely by fungi. The infection may be caused by an injury or surgical wound (exogenous) or by endogenous septic emboli in such diseases as bacterial endocarditis or meningococcemia.