Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.

Lanny Lai Hsieh, MD

Individual provider Hospitalist Physician · NPI 1184828444

Lanny Lai Hsieh, MD is an Infectious Disease in Orange, California. Graduated from New York University School of Medicine in 1999, 27 years ago. Practices with The Regents of the University of California-Irvine, a 104-clinician group and accepts Medicare assignment. Licensed in California.

Years since qualifying
27
Trained at
New York University School of Medicine
Licensed in
CA
In the registry since
2007
Specialties on file
3
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

See every abbreviation used in this directory →

Practice location Address checks out

101 The City Dr S
Orange, CA 92868-3201
Phone: (714) 456-8068
Fax: (714) 456-3765
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Hospitalist Physician (primary) Taxonomy 208M00000X · Licence A74172 (CA)
Internal Medicine Physician Taxonomy 207R00000X · Licence A74172 (CA)
Infectious Disease Physician Taxonomy 207RI0200X · Licence A74172 (CA)

Record details

NPI number1184828444
Entity typeIndividual (Type 1)
GenderFemale
Credentials MD
Sole proprietorNo
NPI enumeratedJune 12, 2007
Last updated in NPPESNovember 30, 2023
Certification dateNovember 30, 2023

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyINFECTIOUS DISEASE
Medical schoolNEW YORK UNIVERSITY SCHOOL OF MEDICINE
Graduated 1999 (27 years in practice)
Group practice The Regents Of The University Of California-Irvine — 104 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations3 on file with Medicare

Other providers in Orange