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    v1.0.28
    OpenPayerBilling CodesDisorders of sclera, cornea, iris and ciliary bodyICD-10-CM h20-iridocyclitis
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    ICD-10-CM Code For Iridocyclitis: Group Overview

    The International Classification of Diseases, Tenth Revision, Clinical Modification (ICD-10-CM) code group H20 includes inflammatory disorders of the iris and ciliary body such as acute, chronic, and unspecified iridocyclitis, and can capture laterality and complications when specified. These ICD-10-CM diagnosis codes are used to document inflammatory involvement of the anterior uveal tract, capturing disease acuity, laterality, and any associated complications relevant to management. Accurate coding within the ICD-10-CM H20 group supports proper claim adjudication, complete clinical documentation, and appropriate reimbursement.

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    ICD-10-CM H20: Iridocyclitis Overview

    The ICD-10-CM H20 group encompasses inflammatory conditions of the iris and ciliary body, commonly referred to as iridocyclitis or anterior uveitis. These diagnoses target the anterior segment of the eye and can affect vision and ocular comfort. Accurate coding matters for appropriate claim adjudication and to reflect the clinical complexity for reimbursement.

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    When to Use

    Use a code from this group when a clinician documents iridocyclitis or anterior uveitis involving the iris and ciliary body. Select the most specific code available to reflect acuity, laterality, and any documented complications.

    ICD-10-CM Codes

    38 rows

    ICD-10-CM CodeDescription
    H20.00Unspecified acute and subacute iridocyclitis
    H20.011Primary iridocyclitis, right eye
    H20.012Primary iridocyclitis, left eye
    H20.013Primary iridocyclitis, bilateral
    H20.019Primary iridocyclitis, unspecified eye
    H20.021Recurrent acute iridocyclitis, right eye
    H20.022Recurrent acute iridocyclitis, left eye
    H20.023Recurrent acute iridocyclitis, bilateral
    H20.029Recurrent acute iridocyclitis, unspecified eye
    H20.031Secondary infectious iridocyclitis, right eye
    H20.032Secondary infectious iridocyclitis, left eye
    H20.033Secondary infectious iridocyclitis, bilateral
    H20.039Secondary infectious iridocyclitis, unspecified eye
    H20.041Secondary noninfectious iridocyclitis, right eye
    H20.042Secondary noninfectious iridocyclitis, left eye
    H20.043Secondary noninfectious iridocyclitis, bilateral
    H20.049Secondary noninfectious iridocyclitis, unspecified eye
    H20.051Hypopyon, right eye
    H20.052Hypopyon, left eye
    H20.053Hypopyon, bilateral

    Showing 1–20 of 38

    DRG Codes

    2 rows

    DRG CodeDescription
    124Other Disorders of the Eye with MCC or Thrombolytic Agent
    125Other Disorders of the Eye without MCC

    Typical Clinical Scenarios

    • A 28-year-old contact lens wearer presents to the emergency department with acute onset severe eye pain, photophobia, redness, and blurred vision after several days of irritation. Slit-lamp exam reveals anterior chamber inflammation with cells and flare consistent with acute iridocyclitis involving the iris and ciliary body; infectious causes are considered and urgent ophthalmology evaluation is arranged. A code from this group is assigned to document the acute anterior segment inflammatory process. Typical codes: H20.0, H20.00, H20.10.
    • A 52-year-old patient with a history of chronic noninfectious anterior uveitis associated with autoimmune disease attends a follow-up clinic visit for longstanding intermittent eye pain, floaters, and mild visual fluctuation despite maintenance therapy. Examination shows low-grade anterior chamber inflammation and posterior synechiae from prior episodes, indicating chronic or recurrent iridocyclitis requiring ongoing management and documentation of laterality and chronicity. Typical codes: H20.11, H20.12, H20.13.
    • A 65-year-old diabetic patient is hospitalized after cataract surgery complicated by postoperative anterior segment inflammation with hypopyon and marked anterior chamber reaction; the ophthalmologist documents internal ocular inflammation related to surgery with concern for postoperative infectious endophthalmitis vs severe postoperative iridocyclitis. A diagnosis from this group is used to capture the postoperative anterior uveal inflammation as a complication/comorbidity during the hospital stay. Typical codes: H20.821, H20.822, H20.829.

    Related Codes

    H15-DISORDERS-OF-SCLERA

    ICD-10-CM Code For Disorders Of Sclera: Group Overview

    H16-KERATITIS-CORNEAL-DISORDERS

    ICD-10-CM Code For Keratitis: Group Overview

    H17-CORNEAL-SCARS-AND-OPACITIES

    ICD-10-CM Code For Corneal Scars And Opacities: Group Overview

    H18-OTHER-DISORDERS-OF-CORNEA

    ICD-10-CM Code For Other Disorders Of Cornea: Group Overview

    H21-OTHER-DISORDERS-OF-IRIS

    ICD-10-CM Code For Other Disorders Of Iris And Ciliary Body: Group Overview

    H22-DISORDERS-OF-IRIS-AND-CILIARY-BODY

    ICD-10-CM Code For Disorders Of Iris And Ciliary Body In Diseases Classified Elsewhere: Group Overview

    Frequently Asked Questions

    References

    1. 1.CPT® Codes and Descriptions. AAPC. Retrieved Aug 11, 2026.Maintains the CPT code set's official descriptions and guidelines, licensed from the American Medical Association, used as the definitional source for CPT codes on this page.
    2. 2.HCPCS Quarterly Update. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's quarterly release of HCPCS Level II codes and short/long descriptors, the source for HCPCS code definitions and update history.
    3. 3.ICD-10-CM Full Code List. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's complete ICD-10-CM diagnosis code list, used to cross-reference diagnosis codes associated with this procedure or service.
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