CATHERINE NGUYEN, PA-C appears in the CMS NPPES registry as a Adolescent Medicine (Internal Medicine) Physician provider holding PA-C credentials at 13671 BEACH BLVD STE A, WESTMINSTER, CA, 92683, with a listed phone of (714) 467-4321. NPI 1326316076 was issued on 12/09/2011. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what NGUYEN 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 7,962 prescription claims written by this provider, covering 548 Medicare beneficiaries and totaling roughly $1.5 million in drug spend, split 17% brand-name and 83% generic by claim count, with an opioid prescribing rate of 0.9%. 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.

Adolescent Medicine (Internal Medicine) Physician is a narrow specialty nationwide, with 377 enrolled providers across 46 states and an average of 3,242 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.