H18.55
Macular corneal dystrophy
Clinical Classification Guidelines
Medical Intelligence & Overview
Macular corneal dystrophy is a rare genetic eye disorder that affects the cornea, the clear, domed surface that covers the front of the eye. This condition leads to progressive clouding of the cornea, which can impair vision over time. It is inherited in an autosomal recessive pattern, meaning both parents must pass on the defective gene for a person to develop the disease. Recognizing the signs early and understanding the nature of macular corneal dystrophy can help in managing its progression and its impact on vision.
Causes & Symptoms
Clinical Causes: Genetics: The primary cause of macular corneal dystrophy is mutations in the CD34 gene. These genetic changes are inherited from both parents. Autosomal recessive inheritance: A person must inherit two copies of the defective gene—one from each parent—to develop the disorder. Abnormal accumulation of mucopolysaccharides: These substances build up within the corneal tissue, leading to cloudiness and thickening. Progressive degeneration: The ongoing buildup of abnormal deposits results in worsening corneal clarity and vision impairment.
Key Symptoms: Corneal clouding or opacification, typically bilateral (affecting both eyes) Decreased visual acuity or clarity, gradually worsening over time Corneal haze that can thickens as the disease progresses Presence of faint, grayish-white deposits in the cornea Possible discomfort or mild irritation in the affected eye, though pain is uncommon
Diagnostic & Treatment
Diagnosis Path: Diagnosing macular corneal dystrophy involves a comprehensive eye examination, including slit-lamp biomicroscopy, which allows detailed visualization of corneal structures. Additional diagnostic procedures include:
Treatment Protocols: Management of macular corneal dystrophy primarily aims to restore or preserve vision, as there is no cure to reverse the condition. Common treatments include:
Clinical Advice & FAQs
Billing Guidance
Is H18.55 a billable ICD-10 code?
Yes, H18.55 is a specific, billable code that can be used to indicate a diagnosis for reimbursement purposes.
Documentation
How do I report H18.55?
Clinical documentation must specify the nature of Macular corneal dystrophy and any associated comorbidities for accurate reporting.
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