Dr. Lanny Hsieh, MD

With 19 years of practice, Dr. Lanny Hsieh is an established infectious disease provider, MD, after earning their medical degree at New York University School Of Medicine in 1999. Dr. currently practices across 9 facilities, including Regents Of The University Of in Orange, California. Their National Provider Identifier (NPI) is 1184828444, and the profile below combines data from CMS NPPES, Medicare billing records, the HHS OIG exclusion list, and — where available — CMS Open Payments, Medicare Utilization, and Part D prescriber summaries.

Dr. Lanny Hsieh's practice is located in ZIP 92868 (Orange, California), which has an overall CartoChrome Healthcare Access Score of 43/100 (Limited Access). Access constraints in this ZIP code can affect wait times, specialist availability, and emergency response — context worth knowing when choosing a provider.

CMS Medicare data shows Dr. Lanny Hsieh as a lower-volume infectious disease provider, treating approximately 221 Medicare beneficiaries and delivering 516 services in the most recent reporting year. That panel size indicates a smaller, more selective practice pattern.