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

Dr. Theodore Robertson Pak, MD, PHD

Individual provider Infectious Disease Physician · NPI 1013476100

Dr. Theodore Robertson Pak, MD, PHD is an Infectious Disease in Orange, California. Graduated from Icahn School of Medicine at Mount Sinai in 2019, 7 years ago. Practices with Uc Regents, a 306-clinician group and accepts Medicare assignment. Licensed in California and Massachusetts.

Years since qualifying
7
Trained at
Icahn School of Medicine at Mount Sinai
Licensed in
CA, MA
In the registry since
2019
Specialties on file
3
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.
PHD — Doctor of Philosophy
A research doctorate. In healthcare it usually sits alongside a clinical licence.

See every abbreviation used in this directory →

Practice location Address checks out

101 The City Dr S
Orange, CA 92868-3201
Phone: (714) 456-8888
Show map & directions

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

Specialties & licences

Infectious Disease Physician (primary) Taxonomy 207RI0200X · Licence A203241 (CA)
Infectious Disease Physician Taxonomy 207RI0200X · Licence 291119 (MA)
Internal Medicine Physician Taxonomy 207R00000X · Licence 291119 (MA)

Record details

NPI number1013476100
Entity typeIndividual (Type 1)
GenderMale
Credentials MD , PHD
Sole proprietorNo
NPI enumeratedMarch 18, 2019
Last updated in NPPESJanuary 9, 2026
Certification dateJanuary 9, 2026

Medicare enrollment

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

Medicare specialtyINFECTIOUS DISEASE
Medical schoolICAHN SCHOOL OF MEDICINE AT MOUNT SINAI
Graduated 2019 (7 years in practice)
Group practice Uc Regents — 306 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

Other providers in Orange