- Dr. Koffend is an advocate for early hearing identification and rehabiliation. She is a consultant for the Guam EHDI Program (Early Hearing Detection & Intervention). Dr. Koffend provides newborn hearing screening training to hospital staff at the Guam Memorial Hospital and Sagua Minagu.
- Dr. Castro’s clinic.
- Dr. Koffend is an authorized dispenser for the entire product line for the companies listed below: