Simpson, RDHAP delivers mobile dental hygiene across Coronado Island as a Registered Dental Hygienist in Alternative Practice, a California-unique advanced credential authorizing independent clinical work without on-site dentist supervision. Her University of the Pacific Arthur A. Dugoni School of Dentistry training supports a scope reaching beyond traditional office hygiene, with complex periodontal cases referred to Advanced Dentistry on Orange Avenue for restorative work exceeding the RDHAP license's preventive boundaries. The designation authorizes specialized cleanings, periodontal scaling and root planing, fluoride treatments, and oral cancer screenings delivered directly in private homes, assisted living communities, and nursing facilities across the 92118 ZIP code. Homebound patients on Coronado Island who need follow-up restorative or prosthetic procedures route through the RDHAP's referral network to Isabella Avenue Dentistry for in-office work beyond the hygiene scope. Clinical protocols cover subgingival instrumentation with ultrasonic scaling devices, site-specific antibiotic placement for refractory periodontal pockets, and tactile mucosal examination techniques for early oral cancer detection.