Maria T. Mercado-Gans, MSN, PHN, RN, NPMSN, PHN, RN, NPUnclaimed · claim itNurse Practitioner — GerontologyFairfield, CA3+ years experienceRegistered with an NPI since 2023. National Provider Identifiers only began in 2005, so a provider who qualified earlier may have practiced for longer than this.(707) 425-2289NPI 1760176309View Profile Claim