ICD10 code of Hyperkalemic periodic paralysis and ICD9 code

The ICD-10 code for Hyperkalemic periodic paralysis is G72.3, which is categorized under periodic paralysis. In the older ICD-9-CM classification system, the condition was represented by the code 359.3.

What is Hyperkalemic periodic paralysis?

Hyperkalemic periodic paralysis is a rare autosomal dominant neuromuscular disorder characterized by episodes of muscle weakness or paralysis that occur in association with elevated serum potassium levels. Unlike other forms of periodic paralysis, patients with Hyperkalemic periodic paralysis often experience attacks that are triggered by rest after exercise, fasting, or the ingestion of potassium-rich foods. Because this condition is rare—with an estimated prevalence of approximately 1 in 100,000 to 200,000 individuals—it is often misdiagnosed or overlooked in clinical settings.

How is Hyperkalemic periodic paralysis diagnosed?

Diagnosis of Hyperkalemic periodic paralysis relies on a combination of clinical history, laboratory testing, and genetic analysis. During an active attack, a physician will typically measure serum potassium levels, which are often (though not always) elevated. Genetic testing is the gold standard for confirmation, as Hyperkalemic periodic paralysis is primarily caused by mutations in the SCN4A gene, which encodes the alpha subunit of the skeletal muscle sodium channel. At DiseaseMaps.org, we have seen 21 members join our community who are actively navigating these diagnostic and management hurdles, highlighting the importance of specialized care.

What are the common triggers and symptoms of Hyperkalemic periodic paralysis?

Understanding the triggers of Hyperkalemic periodic paralysis is vital for symptom management and quality of life. Common clinical presentations include:

• Episodes of muscle weakness lasting from minutes to several hours.


• Myotonia, which is a delayed relaxation of muscles, often seen in the eyelids or hands.


• Weakness triggered by potassium-rich foods (e.g., bananas, potatoes).


• Attacks precipitated by cold temperatures or physical exhaustion.


• Potential for permanent muscle weakness (myopathy) in later stages of the disease.

Is Hyperkalemic periodic paralysis hereditary?

Yes, Hyperkalemic periodic paralysis is an inherited condition with an autosomal dominant pattern of inheritance. This means that an affected individual has a 50% chance of passing the SCN4A gene mutation to each of their children. Genetic counseling is highly recommended for families affected by Hyperkalemic periodic paralysis to discuss reproductive options and the likelihood of inheritance. Because of the variable expressivity of the condition, family members with the same genetic mutation may experience symptoms of varying severity.

Next steps

• Consult a neuromuscular specialist or a neurologist who has experience treating ion channelopathies.


• Request a referral to a genetic counselor to discuss the implications of your SCN4A mutation for your family.


• Keep a detailed symptom diary to identify specific dietary or environmental triggers unique to your experience with Hyperkalemic periodic paralysis.


• Connect with the 21 other members at DiseaseMaps.org to share management strategies and peer support.


• Discuss the potential benefits of carbonic anhydrase inhibitors or other prophylactic medications with your healthcare provider.

Medical Disclaimer: This information is for educational purposes only and does not constitute professional medical advice, diagnosis, or treatment; always seek the advice of your physician regarding a medical condition.

References

• National Institutes of Health (NIH) Genetic and Rare Diseases Information Center (GARD): Hyperkalemic periodic paralysis.


• Orphanet: Hyperkalemic periodic paralysis (ORPHA:684).


• Online Mendelian Inheritance in Man (OMIM): #170500 - HYPERKALEMIC PERIODIC PARALYSIS.


• The Periodic Paralysis Association (PPA): Patient resources and clinical information.