ICD10 code of Fibular hemimelia and ICD9 code

Fibular hemimelia is classified under the ICD-10-CM code Q72.6 (Fibular hemimelia) and the ICD-9-CM code 755.33 (Congenital absence, hypoplasia, or dysplasia of fibula). These diagnostic codes are essential for medical billing, clinical documentation, and tracking the prevalence of this rare congenital limb deficiency.

What is Fibular hemimelia?

Fibular hemimelia is a rare congenital condition characterized by the partial or complete absence of the fibula bone in the lower leg. As a team of specialists at DiseaseMaps.org, we recognize the challenges this condition presents to our community members. Because the fibula acts as a structural support for the ankle and a site for muscle attachment, its absence or underdevelopment often leads to leg length discrepancy, ankle instability, and foot deformities. While the exact cause remains largely idiopathic, it is classified as a longitudinal limb deficiency, and its severity can range from mild hypoplasia to total aplasia of the bone.

How is Fibular hemimelia diagnosed and classified?

Diagnosis typically occurs via ultrasound during the prenatal period or through physical examination and X-ray imaging shortly after birth. Clinicians often use the Achterman and Kalamchi classification system to grade the severity of fibular hemimelia. This system helps medical teams determine the most appropriate treatment pathway, ranging from orthotic management to complex limb-lengthening surgeries. Because fibular hemimelia often impacts the entire limb, including the knee and ankle joints, a multidisciplinary approach involving pediatric orthopedists and physical therapists is critical from infancy.

Is Fibular hemimelia hereditary?

In the vast majority of cases, fibular hemimelia is considered a sporadic event, meaning it occurs randomly and is not inherited from parents. Geneticists have not identified a single "fibular hemimelia gene," though research continues into potential developmental disruptions during the first trimester of pregnancy. Because the condition is rarely familial, recurrence risk for future pregnancies is generally considered very low. However, families are encouraged to consult with a clinical geneticist to review their specific medical history and address any concerns regarding hereditary patterns.

What are the common clinical features associated with the condition?

Patients living with fibular hemimelia often navigate a complex journey involving orthopedic interventions. Common clinical features include:

• Significant leg length discrepancy (LLD) as the child grows.


• Ankle valgus (tilting of the ankle) and instability.


• Absence of specific foot bones, such as the lateral rays or tarsal bones.


• Congenital knee instability or flexion contractures.


• Equinovalgus foot deformity.

Next steps

• Consult with a pediatric orthopedic surgeon who specializes in limb lengthening and reconstruction.


• Connect with the 5 members of the fibular hemimelia community on DiseaseMaps.org to share experiences and coping strategies.


• Maintain a detailed file of all imaging (X-rays, MRIs) and surgical reports for coordination between specialists.


• Engage with physical therapy early to maintain joint range of motion and muscle strength.

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

References

• Orphanet: Fibular hemimelia (ORPHA:415206)


• NIH Genetic and Rare Diseases Information Center (GARD): Fibular hemimelia


• OMIM (Online Mendelian Inheritance in Man): Fibular aplasia or hypoplasia


• Journal of the American Academy of Orthopaedic Surgeons: Management of Congenital Fibular Deficiency