ICD10 code of Cornelia de Lange Syndrome and ICD9 code

Cornelia de Lange Syndrome (CdLS) is classified under the ICD-10 code Q87.1, which covers congenital malformation syndromes predominantly associated with short stature. In the older ICD-9-CM classification system, Cornelia de Lange Syndrome is identified by the code 759.89, which refers to other specified congenital anomalies.

What is the clinical significance of these diagnostic codes?

For individuals and families navigating the healthcare system, the ICD-10 code Q87.1 is the primary identifier used for Cornelia de Lange Syndrome in medical billing, insurance authorization, and public health statistics. Because Cornelia de Lange Syndrome is a rare genetic condition, these codes are essential for accessing specialized care, securing disability support, and ensuring that clinical encounters are accurately recorded in electronic health records. While the ICD-9 code 759.89 is now considered legacy, you may still see it in older medical files or archival research regarding the history of Cornelia de Lange Syndrome diagnosis.

What causes Cornelia de Lange Syndrome?

Cornelia de Lange Syndrome is a developmental disorder caused by mutations in genes involved in the cohesin complex. The most common gene associated with the condition is NIPBL, which accounts for approximately 60% of clinical cases. Other genes, such as SMC1A, SMC3, RAD21, and HDAC8, are also implicated. The genetic nature of Cornelia de Lange Syndrome means that it is often diagnosed through clinical evaluation followed by molecular genetic testing, which confirms the specific mutation causing the syndrome.

What are the common clinical features of Cornelia de Lange Syndrome?

The presentation of Cornelia de Lange Syndrome is highly variable, ranging from mild to severe. Because of this spectrum, the clinical management of Cornelia de Lange Syndrome requires a multidisciplinary approach. Common features observed in our community of 133 members include:

• Distinctive facial features, including thin, down-turned upper lips and synophrys (joined eyebrows).


• Significant growth restriction, beginning in the prenatal period and persisting through childhood.


• Developmental delays and intellectual disability, which vary significantly between individuals.


• Limb differences, which can range from small hands and feet to the absence of forearms or fingers.


• Gastrointestinal issues, particularly severe gastroesophageal reflux disease (GERD).


• Behavioral challenges, which may include anxiety or self-injurious behaviors in some individuals.

How can families connect with others affected by the syndrome?

Living with a rare diagnosis can feel isolating, but you are not alone. Currently, 133 people with Cornelia de Lange Syndrome have joined the DiseaseMaps.org community, sharing their lived experiences, tips for managing daily challenges, and emotional support. Engaging with these peer-led groups can provide practical insights that clinical literature alone cannot offer, such as navigating school accommodations or finding specialists familiar with the unique needs of those with Cornelia de Lange Syndrome.

Next steps

• Consult with a clinical geneticist to confirm diagnosis via molecular testing.


• Request a referral to a multidisciplinary center of excellence that specializes in the management of rare multisystem disorders.


• Join the DiseaseMaps.org community to connect with other families and share experiences.


• Contact the Cornelia de Lange Syndrome Foundation for disease-specific resources and support networks.

Medical disclaimer: This information is for educational purposes only and does not constitute medical advice, diagnosis, or treatment; always seek the advice of a qualified physician or healthcare provider with any questions regarding a medical condition.

References

• Orphanet: Cornelia de Lange Syndrome (ORPHA:207)


• NIH Genetic and Rare Diseases Information Center (GARD): Cornelia de Lange Syndrome


• OMIM (Online Mendelian Inheritance in Man): Cornelia de Lange Syndrome (Entry #122470)


• Cornelia de Lange Syndrome Foundation (cdlsusa.org)