Pediatric Adverse Events Terminology Pediatric Adverse Events Terminology Mapped to MedDRA Hearing Loss Patient Code (Appendix B) Hearing Loss Impaired ability to hear. Disease or Syndrome NICHD A partial or complete loss of hearing in one or both ears. It is classified as conductive, sensory, or central. C35731 C3887873 Hearing Loss FDA MedDRA Hearing loss Hearing_Loss Hearing Impairment NICHD Terminology Neurological Development Terminology