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

Dr. Kathryn Marie Larsen, MD

Individual provider Family Medicine Physician · NPI 1598845638

Dr. Kathryn Marie Larsen, MD is registered under Family Practice in Santa Ana, California. Graduated from University of Washington School of Medicine in 1981, 45 years ago. Practices with University of California Irvine, a 60-clinician group, works from 2 locations and accepts Medicare assignment. Licensed in California.

Years since qualifying
45
Trained at
University of Washington 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

800 N Main St
Santa Ana, CA 92701-3576
Phone: (657) 282-6355
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • Uci Medical Center, Orange, CA 92868 — (714) 456-8978

Specialties & licences

Family Medicine Physician (primary) Taxonomy 207Q00000X · Licence 000000G48790 (CA)

Record details

NPI number1598845638
Entity typeIndividual (Type 1)
GenderFemale
Credentials MD
Sole proprietorNo
NPI enumeratedOctober 16, 2006
Last updated in NPPESFebruary 28, 2023
Certification dateFebruary 28, 2023

Medicare enrollment

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

Medicare specialtyFAMILY PRACTICE
Medical schoolUNIVERSITY OF WASHINGTON SCHOOL OF MEDICINE
Graduated 1981 (45 years in practice)
Group practice University Of California Irvine — 60 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

Payments from drug and device companies, 2025

Drug and device makers are required by federal law (the Physician Payments Sunshine Act) to report what they pay or give to clinicians, and CMS publishes the reports as Open Payments. This is the 2025 program year. A report is a record of a payment, not an allegation of anything, and many are small items such as meals. Only general payments are listed here; research payments and ownership or investment interests are reported separately by CMS and are not shown.

Food and Beverage $14 1 payment · a meal or drink at a meeting or visit, not a fee

Each amount is the sum of what companies reported for that kind of payment in 2025, rounded to the dollar. Not all of it is income to the clinician: a meal is not a fee, a charitable contribution goes to a charity, and a royalty or an acquisition payment is not a salary.

Check a report, or dispute one, at the source in CMS’s own tool, Open Payments. Corrections go through CMS’s dispute process. This site removes a home address on request and asks for no proof, because that is privacy; it will not remove an accurate payment report on request, because that is a statutory public disclosure.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician.

  • Uci Health-Orange Hospital · Orange, CA

Colleagues at University of California Irvine

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 60 clinicians in the practice; 12 are shown here.

Other providers in Santa Ana