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

Jonathan Sehjin Chun, MD

Individual provider Surgery Physician · NPI 1396777926

Jonathan Sehjin Chun, MD practises General Surgery in Portland, Oregon. Graduated from Washington University School of Medicine in 2001, 25 years ago. Practices with Portland Adventist Medical Center, a 272-clinician group and accepts Medicare assignment. Licensed in Kentucky, Maryland, Missouri and Oregon and 2 more.

Years since qualifying
25
Trained at
Washington University School of Medicine
Licensed in
KY, MD, MO, OR, WA, WI
In the registry since
2006
Specialties on file
8
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

10000 SE Main St Ste 316
Portland, OR 97216-2470
Phone: (503) 256-1575
Fax: (503) 253-9848
Show map & directions

Directions in Google Maps · Apple Maps · OpenStreetMap

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

Specialties & licences

Surgery Physician (primary) Taxonomy 208600000X · Licence MD176699 (OR)
Surgery Physician Taxonomy 208600000X · Licence BC61205873 (WA)
Surgery Physician Taxonomy 208600000X · Licence 49366 (WI)
Surgery Physician Taxonomy 208600000X · Licence D71895 (MD)
Colon & Rectal Surgery Physician Taxonomy 208C00000X · Licence BC61205873 (WA)
Colon & Rectal Surgery Physician Taxonomy 208C00000X · Licence MD176699 (OR)
Colon & Rectal Surgery Physician Taxonomy 208C00000X · Licence 43060 (KY)
Colon & Rectal Surgery Physician Taxonomy 208C00000X · Licence 2008017345 (MO)

Record details

NPI number1396777926
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedJuly 6, 2006
Last updated in NPPESFebruary 13, 2025
Certification dateFebruary 13, 2025

Medicare enrollment

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

Medicare specialtyGENERAL SURGERY
Also practisesCOLORECTAL SURGERY (PROCTOLOGY)
Medical schoolWASHINGTON UNIVERSITY SCHOOL OF MEDICINE
Graduated 2001 (25 years in practice)
Group practice Portland Adventist Medical Center — 272 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

Procedures

From CMS Care Compare, which counts the procedures a clinician billed to Original Medicare and Medicare Advantage over a recent 12-month period. CMS reports a fixed list of common procedures, so this is not everything the clinician does. Counts of 10 or fewer are given as a range, because CMS withholds small numbers.

Colonoscopy 1–10 times
Removal of tissue 1–10 times

The percentile compares how often this clinician performed the procedure with other clinicians who performed it, as CMS calculates it. It measures volume, not outcomes or skill.

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 patients45
Services billed 108 a service is one billed item, such as a visit, a test or a procedure
Average patient age67

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.

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.

Education $750 1 payment · educational material or training, not a fee
Travel and Lodging $371 2 payments · travel or lodging paid or reimbursed, such as to attend a conference
Food and Beverage $22 4 payments · 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.

  • Adventist Health Portland Hospital · Portland, OR
  • Ohsu Hospital And Clinics Hospital · Portland, OR

Colleagues at Portland Adventist Medical Center

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 272 clinicians in the practice; 12 are shown here.

Other providers in Portland