Registered Dental Hygienist in Alternative Practice (RDHAP) serving Coronado, CA 92118. Cynthia Simpson holds California's RDHAP license — an advanced dental hygiene credential unique to California that authorizes independent practice without on-site dentist supervision. RDHAPs like Ms. Simpson specialize in reaching patients who cannot easily access traditional dental offices, providing professional cleanings, periodontal scaling, fluoride treatments, oral cancer screenings, and oral hygiene education in private homes, nursing facilities, assisted living communities, and other non-traditional settings. An RDHAP is the only dental hygiene provider in California licensed to serve homebound and underserved patients independently. For traditional dental office care in Coronado, see Coronado Dental Associates on B Avenue or Coronado Dental Group on Ynez Place.