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

Dr. Curtis W SIU, MD

Individual provider Internal Medicine Physician · NPI 1386613081

Dr. Curtis W SIU, MD is an Internal Medicine in Laguna Hills, California. Graduated from University of California, San Diego School of Medicine in 1999, 27 years ago. Practices with Saddleback Medical Group Inc, a 28-clinician group, accepts Medicare assignment and offers telehealth. Licensed in California.

Years since qualifying
27
Trained at
University of California, San Diego School of Medicine
Licensed in
CA
In the registry since
2006
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

23521 Paseo De Valencia Ste 108
Laguna Hills, CA 92653-3137
Phone: (949) 872-5227
Fax: (949) 588-2167
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence A74829 (CA)

Record details

NPI number1386613081
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedMarch 15, 2006
Last updated in NPPESApril 29, 2026
Certification dateApril 29, 2026

Medicare enrollment

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

Medicare specialtyINTERNAL MEDICINE
Medical schoolUNIVERSITY OF CALIFORNIA, SAN DIEGO SCHOOL OF MEDICINE
Graduated 1999 (27 years in practice)
Group practice Saddleback Medical Group Inc — 28 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services
Practice locations2 on file with Medicare

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