- Craniosynostosis. In particular, Dr. Ahn specializes in endoscopic treatment in order to minimize surgery for both syndromic and non-syndromic types of craniosynostosis
- Fetal anomalies. Dr. Ahn, in teaming with maternal fetal medicine, offers fetal repair of spina bifida through minimally invasive methods
- Moyamoya disease
- Arteriovenous malformations
- Chiari malformations
- Hydrocephalus. Dr. Ahn performs endoscopic third ventriculostomy and endoscope-assisted surgery for complex hydrocephalus
- Arachnoid cysts
- Tethered spinal cord
Dr. Ahn conducts clinical research on outcomes of children with hydrocephalus. He is also an innovator of techniques to improve the safety of surgery for craniosynostosis and moyamoya disease. He widely publishes in scientific journals and is a member of the editorial board for an international journal in pediatric neurosurgery.