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    v1.0.28
    OpenPayerBilling CodesDisorders of lensICD-10-CM h28-cataract-in-diseases-classified-elsewhere
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    ICD-10-CM Code For Cataract In Diseases Classified Elsewhere: Group Overview

    The International Classification of Diseases, Tenth Revision, Clinical Modification (ICD-10-CM) code group H28 includes cataracts that are secondary to other systemic or ocular diseases, such as traumatic, metabolic, inflammatory, or postoperative conditions, and specifies laterality and causative context. These ICD-10-CM diagnosis codes are used to document the presence of lens opacification attributable to another underlying condition, capturing clinical complexity and causation relevant to ophthalmic and systemic care. Accurate coding within the ICD-10-CM H28 group supports proper claim adjudication, complete clinical documentation, and appropriate reimbursement.

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    ICD-10-CM H28: Cataract In Diseases Classified Elsewhere Overview

    This group represents cataract diagnoses that occur as a direct result of systemic or ocular conditions classified elsewhere, affecting the lens of the eye. It targets lens opacities secondary to other diseases and complications, and includes laterality and specific causative conditions when specified. Accurate coding matters for reimbursement because it clarifies medical necessity and links the cataract to the underlying diagnosis driving treatment choices.

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    When to Use

    Use a code from this group when a cataract is clinically documented as secondary to another disease, such as inflammatory, metabolic, traumatic, or postoperative causes. Select the most specific code that documents the underlying causative condition and laterality when provided in the medical record.

    ICD-10-CM Codes

    1 rows

    ICD-10-CM CodeDescription
    H28Cataract in diseases classified elsewhere

    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

    • An elderly patient with gradually progressive blurring of vision and glare while driving presents to the ophthalmology clinic for evaluation; slit-lamp exam reveals lens opacity consistent with cataract in the setting of an underlying ocular or systemic disorder (such as uveitis or high myopia) contributing to lens changes, so a diagnosis from this group is assigned to indicate cataract attributed to another disease process. Typical codes: H28
    • A middle-aged patient with a history of chronic anterior uveitis reports recent decreased visual acuity and photophobia; on exam there are focal lens opacities thought to be secondary to the inflammatory process, prompting assignment of a cataract-in-diseases-classified-elsewhere code to capture the lens disorder as a complication of the underlying inflammatory disease. Typical codes: H28
    • A postoperative patient who underwent radiation therapy for orbital lymphoma develops progressive posterior subcapsular lens opacities noted on follow-up ophthalmology visit; because the cataract is attributable to the prior therapeutic exposure (a disease or treatment classified elsewhere), the clinician assigns a code from this group to document the etiology. Typical codes: H28

    Related Codes

    H25-AGE-RELATED-CATARACT

    ICD-10-CM Code For Age-Related Cataract: Group Overview

    H26-OTHER-CATARACT

    ICD-10-CM Code For Other Cataract: Group Overview

    H27-OTHER-DISORDERS-OF-LENS

    ICD-10-CM Code For Other Disorders Of Lens: 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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