Short answer · Medically reviewed summary · Last updated: 2026-04-07
The ICD-10-CM code for Williams syndrome is Q93.82, while the legacy ICD-9-CM code is 758.31. As a clinician who has supported many families navigating the diagnostic journey of Williams syndrome, I understand that these codes are more than just administrative identifiers; they are the keys to accessing necessary therapeutic services, insurance coverage, and specialized medical support. Williams syndrome is a rare genetic condition caused by a microdeletion on chromosome 7q11.23, which affects approximately 1 in 7,500 to 10,000 individuals worldwide. Understanding Clinical Coding In the clinical setting, the ICD-10-CM code Q93.82 (Williams syndrome) is essential for documenting the multisystem nature of the condition.
2 people with Williams Syndrome have shared their first-person experience on this question at DiseaseMaps.
ICD10 code of Williams Syndrome and ICD9 code
ICD-10 and ICD-9 codes for Williams Syndrome, with classification details for clinicians, coders and patients.
The ICD-10-CM code for Williams syndrome is Q93.82, while the legacy ICD-9-CM code is 758.31.
As a clinician who has supported many families navigating the diagnostic journey of Williams syndrome, I understand that these codes are more than just administrative identifiers; they are the keys to accessing necessary therapeutic services, insurance coverage, and specialized medical support. Williams syndrome is a rare genetic condition caused by a microdeletion on chromosome 7q11.23, which affects approximately 1 in 7,500 to 10,000 individuals worldwide.
Understanding Clinical Coding
In the clinical setting, the ICD-10-CM code Q93.82 (Williams syndrome) is essential for documenting the multisystem nature of the condition. Because Williams syndrome involves complex cardiovascular issues—most commonly supravalvular aortic stenosis (SVAS)—as well as unique neurodevelopmental and endocrine profiles, accurate coding ensures that your medical team can coordinate care across various specialties, including cardiology, endocrinology, and developmental pediatrics.
Practical Implications for Families
For parents and caregivers, knowing these codes can be vital when advocating for early intervention services, speech therapy, or occupational therapy. When you interact with healthcare systems, ensuring that Williams syndrome is correctly coded helps facilitate a more integrated approach to care. While the diagnosis is confirmed through a FISH test or chromosomal microarray, the ICD code remains the primary language used by health insurance providers to authorize the specialized monitoring required for the health and well-being of those living with Williams syndrome.
If you encounter difficulties with insurance coverage or school accommodations, referencing the specific ICD-10 code Q93.82 can help clarify the medical necessity of your requested interventions. Our team is here to support you in navigating these technical requirements so you can focus on what matters most: the health and quality of life of your loved ones.
Disclaimer: This information is for educational purposes and does not replace professional medical advice, diagnosis, or treatment. Always seek the advice of your physician or other qualified health provider with any questions you may have regarding a medical condition.
References
- NIH Genetic and Rare Diseases Information Center (GARD): Williams Syndrome
- Orphanet: Williams Syndrome (ORPHA:904)
- OMIM (Online Mendelian Inheritance in Man): Williams-Beuren Syndrome (#194050)
- Williams Syndrome Association (WSA)
Posted Sep 13, 2017 by Lucia Casella 2000
The specific neurological condition should be type at the end, as this diagnosis contains 7 others:
Acardiac monster
Acardiac syndrome
Caudal dysplasia sequence
Charge association
Kabuki make-up syndrome
Kabuki syndrome
Stickler syndrome
Posted Nov 18, 2017 by Daniel 100
