2025 ICD-10-CM code G71.1
(Active) Effective Date: N/A Diseases of the nervous system - Diseases of myoneural junction and muscle 6 Feed
Myotonic disorders
Medical necessity for services related to myotonic disorders is established by the presence of signs, symptoms, and functional limitations caused by the condition.The medical record should clearly document the impact of the disorder on the patient's ability to perform daily activities and the need for interventions such as medication, therapy, or other supportive services.
Diagnosis involves physical and neurological examination, blood tests (creatine kinase, liver enzymes), muscle biopsy, EMG, NCV, pulmonary function test, ECG, and genetic testing. Treatment focuses on symptom management and may include medication, physical and speech therapy, respiratory support, and surgery if necessary.
In simple words: Myotonic disorders make it hard for muscles to relax after they tighten up. This can make it difficult to do things like let go of objects or stand up.Sometimes, other parts of the body like the heart, eyes, and stomach can also be affected.
Myotonic disorders are a group of genetic neuromuscular conditions characterized by delayed muscle relaxation after contraction (myotonia). This can manifest as difficulty releasing grip, stiffness, and impaired movement.These disorders can also affect other systems in the body, such as the heart, eyes, and digestive system.
Example 1: A 30-year-old patient presents with difficulty releasing grip after shaking hands, stiffness in the fingers, and occasional eyelid spasms. After a thorough examination and diagnostic testing (including EMG and genetic testing), they are diagnosed with myotonic dystrophy type 1 (DM1)., A 50-year-old individual experiences muscle stiffness primarily in the legs and difficulty standing up after sitting for a prolonged period. They also report experiencing worsening stiffness with repeated activity. Following diagnostic tests, including EMG and genetic testing, they are diagnosed with myotonic dystrophy type 2 (DM2)., An infant is born with generalized muscle stiffness and difficulty sucking and swallowing. Upon examination and genetic testing, a diagnosis of congenital myotonia is made.
Documentation should include details of the patient's medical history, family history of similar conditions, physical and neurological examination findings, results of EMG, NCV, genetic testing, and other relevant diagnostic tests. Details about the specific type of myotonic disorder, the affected muscle groups, the severity of symptoms, and any associated complications should also be documented.
- Specialties:Neurology, Genetics, Physical Medicine and Rehabilitation, Cardiology
- Place of Service:Office, Inpatient Hospital, Outpatient Hospital, Independent Clinic