ALVIN FUNG, FNP appears in the CMS NPPES registry as a Primary Care Nurse Practitioner provider holding FNP credentials at 4902 IRVINE CENTER DR, IRVINE, CA, 92604, with a listed phone of (949) 651-9671. NPI 1497426233 was issued on 09/22/2021. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what FUNG most recently submitted to CMS rather than a vetted directory listing, which is why patients should always confirm the practice is still at this location before scheduling.

Medicare Part D records for calendar year 2023 show 288 prescription claims written by this provider, covering 211 Medicare beneficiaries and totaling roughly $5K in drug spend, split 14% brand-name and 86% generic by claim count. These figures capture only Medicare Part D — commercial insurance, Medicaid, and cash-pay prescriptions are not included, and any drug-beneficiary cell under 11 is suppressed by CMS for patient privacy.

Primary Care Nurse Practitioner is a mid-sized specialty nationwide, with 10,138 enrolled providers across 54 states and an average of 1,363 Part D claims per prescriber, so the context for interpreting these metrics differs meaningfully from a primary-care baseline. Important: PlainDoctor is a directory of publicly available government data, not medical advice, a malpractice database, or a quality rating. Inclusion here does not imply a recommendation, and absence of complaints or sanctions on this page does not mean none exist — always verify credentials through the NPPES NPI Registry, your state medical board, and the ABMS or AOA before making healthcare decisions.