G71.11
Myotonic muscular dystrophy
Clinical Classification Guidelines
Inclusion Terms
- Dystrophia myotonica [Steinert]
- Myotonia atrophica
- Myotonic dystrophy
- Proximal myotonic myopathy (PROMM)
- Steinert disease
Medical Intelligence & Overview
Myotonic muscular dystrophy, also known as Steinert's disease, is a genetic disorder characterized by progressive muscle weakness and difficulty relaxing the muscles after contraction—a phenomenon called myotonia. This condition can affect various parts of the body, leading to a wide range of physical and functional impairments. It is the most common form of adult-onset muscular dystrophy, often manifesting in young adulthood and progressing over time.
Causes & Symptoms
Clinical Causes: Genetic mutation in the DMPK gene on chromosome 19 Autosomal dominant inheritance pattern, meaning only one copy of the altered gene can cause the disorder Genetic anticipation, where symptoms may become more severe or appear at a younger age in successive generations due to the expansion of the DNA repeat
Key Symptoms: Muscle weakness, especially in the facial, neck, and limb muscles Myotonia, or delayed muscle relaxation after voluntary movement Cataracts, which can develop early in the disease course Cardiac conduction abnormalities, increasing the risk of arrhythmias Endocrine issues such as insulin resistance and hormonal imbalances Respiratory problems due to weakness in the muscles involved in breathing Difficulty swallowing and speaking Excessive daytime sleepiness and fatigue Cognitive and behavioral changes in some individuals
Diagnostic & Treatment
Diagnosis Path: Diagnosis involves a combination of clinical evaluation, family history assessment, and laboratory testing. Key diagnostic steps include:
Treatment Protocols: Currently, there is no cure for myotonic dystrophy, but various therapies can help manage symptoms and improve quality of life. Treatment strategies include:
Clinical Advice & FAQs
Billing Guidance
Is G71.11 a billable ICD-10 code?
Yes, G71.11 is a specific, billable code that can be used to indicate a diagnosis for reimbursement purposes.
Documentation
How do I report G71.11?
Clinical documentation must specify the nature of Myotonic muscular dystrophy and any associated comorbidities for accurate reporting.
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