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

Dr. Alex Hieu Ly, MD

Individual provider Internal Medicine Physician · NPI 1134380173

Dr. Alex Hieu Ly, MD is an Internal Medicine in Fullerton, California. Qualified in 2008, 18 years ago. Practices with Providence Medical Foundation, a 1,465-clinician group, works from 2 locations and accepts Medicare assignment. Licensed in California, Maine and New York.

Years since qualifying
18
Licensed in
CA, ME, NY
In the registry since
2008
Specialties on file
3
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

101 E Valencia Mesa Dr
Fullerton, CA 92835-3809
Phone: (714) 992-3000
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 1500 Duarte Rd, Duarte, CA 91010-3012 — (626) 256-4673

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence A120555 (CA)
Internal Medicine Physician Taxonomy 207R00000X · Licence 266249 (NY)
Internal Medicine Physician Taxonomy 207R00000X · Licence MD18844 (ME)

Record details

NPI number1134380173
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorYes
NPI enumeratedJune 23, 2008
Last updated in NPPESJune 10, 2022
Certification dateSeptember 23, 2021

Medicare enrollment

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

Medicare specialtyINTERNAL MEDICINE
Medical schoolOTHER
Graduated 2008 (18 years in practice)
Group practice Providence Medical Foundation — 1465 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations5 on file with Medicare

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