Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.

Dr. Mark Thomas Larson, MD

Individual provider Hospice and Palliative Medicine (Emergency Medicine) Physician · NPI 1497973416

Dr. Mark Thomas Larson, MD practises Emergency Medicine in Centralia, Washington. Graduated from Emory University School of Medicine in 1987, 39 years ago. Practices with Olympia Emergency Care Physicians PLLC, a 31-clinician group and accepts Medicare assignment. Licensed in Washington.

Years since qualifying
39
Trained at
Emory University School of Medicine
Licensed in
WA
In the registry since
2007
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

914 S Scheuber Rd
Centralia, WA 98531-9027 Not confirmed with CMS for 19 years — call before visiting
Phone: (360) 330-8785
Fax: (360) 330-8784
Show map & directions

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

Specialties & licences

Hospice and Palliative Medicine (Emergency Medicine) Physician (primary) Taxonomy 207PH0002X · Licence MD00031468 (WA)

Record details

NPI number1497973416
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedApril 23, 2007
Last updated in NPPESJuly 8, 2007

Medicare enrollment

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

Medicare specialtyEMERGENCY MEDICINE
Medical schoolEMORY UNIVERSITY SCHOOL OF MEDICINE
Graduated 1987 (39 years in practice)
Group practice Olympia Emergency Care Physicians Pllc — 31 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients360
Services billed 564 a service is one billed item, such as a visit, a test or a procedure
Average patient age74

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician.

Colleagues at Olympia Emergency Care Physicians PLLC

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 31 clinicians in the practice; 12 are shown here.