Dr. Jonathan Sehjin Chun, MD
- Medicare services, 2024
- 25
- Medicare patients, 2024
- 45
- Part D claims, 2024
- 53
- MIPS score, 2024
- 92
- Hospital affiliations
- 2
- Practice address
- 10123 Se Market Street, Portland, OR 97216
- Practice phone
- Call (503) 257-2500
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Chun's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. Jonathan Sehjin Chun is a general surgeon in Portland, Oregon
Dr. Chun practices at Adventist Health Portland in Portland, Oregon, part of Adventist Health.
Dr. Chun's NPI, 1396777926, was assigned on July 6, 2006. Dr. Chun graduated from Washington University School of Medicine in 2001. Dr. Chun holds Oregon license MD176699.
- NPI
- 1396777926NPI Registry (opens in a new tab)
- Medicare PAC ID
- 9537162474
- NPI enumeration date
- July 6, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (503) 257-2500
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 51
- Medical school graduation
- 2001
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Jonathan Sehjin Chun practices at Adventist Health Portland in Portland, Oregon
Dr. Chun's primary practice is Adventist Health Portland, at 10123 Se Market Street, Portland, OR 97216 in Multnomah County. The practice phone is (503) 257-2500.
- Adventist Health Portland10123 Se Market Street, Portland, OR 97216 · Multnomah CountyPhone(503) 257-2500
Source: Dmand AI Affiliation Data
Dr. Jonathan Sehjin Chun is affiliated with 4 sites of care and 2 medical groups
Dr. Chun's primary practice is Adventist Health Portland in Portland, Oregon, part of Adventist Health. Dr. Chun is also affiliated with OHSU Hospital. The medical group on file is Adventist Health Portland. Dmand AI also links Dr. Chun to 2 more group practices and clinics and 1 medical group, each named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Jonathan Sehjin Chun's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Chun practices, 4 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Adventist Health Portland | Available with a free account |
| +3 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
Dmand AI maps EHR vendors, IT decision makers and buying committees across Adventist Health and 6.2K+ hospitals, with verified contacts in the same login.
Dr. Jonathan Sehjin Chun is one of 438 general surgeons in Oregon
Surgery is Dr. Chun's primary specialty in the NPI Registry, under taxonomy code 208600000X. Dmand AI has Dr. Chun's licenses on file in 6 states: Oregon, Kentucky, Maryland, Missouri, Washington and Wisconsin.
Specialties and state licenses
- Surgery, OregonPrimary
- Kentucky license
- Maryland license
- Missouri license
- Colon and rectal surgery, Washington
- Wisconsin license
General surgeons near Dr. Chun
Counts of general surgeons with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Jonathan Sehjin Chun billed Medicare for 25 services in 2024
CMS data shows 25 Medicare services from Dr. Chun across 2 procedure codes in 2024, for 45 Medicare patients. Medicare paid $953 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Chun's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Surgery
- 2023: 02024: 14
- Office and hospital visits
- 2023: 122024: 118%
Dr. Chun compared with the Oregon median for general surgeons, 2024
- Dr. Chun
- Oregon median
- Medicare services
- 25vs 8370% below
- Medicare patients
- 45vs 8245% below
- Part D claims
- 33vs 4730% below
Medians across 433 general surgeons in Oregon with Dmand AI profiles that report each measure.
Dr. Chun's most billed Medicare procedure codes, 2024
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
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Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Jonathan Sehjin Chun treated 45 Medicare patients in 2024, average age 67
CMS counts 45 Medicare patients who saw Dr. Chun in 2024. The largest group is 65 to 74, with 21 patients. 75% of them have high blood pressure, and 58% have high cholesterol. 38% are also on Medicaid. Their average risk score is 2.01, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Dr. Chun's median patient age at 70, with 49% women.
Dr. Chun's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Chun's Medicare patients by sex, 2024
- Women2147%
- Men2453%
Chronic conditions among Dr. Chun's Medicare patients, 2024
- High blood pressure75%
- High cholesterol58%
- Arthritis40%
- Diabetes36%
- Atrial fibrillation33%
- Heart failure33%
- Ischemic heart disease31%
- Alcohol and drug use disorders29%
Share of Medicare patients with each condition. A patient can have several.
Dr. Chun's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 70
Patient panel by sex, all payers
- Women49%
- Men51%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Jonathan Sehjin Chun wrote 53 Medicare Part D claims in 2024
In 2024, Dr. Chun wrote 53 Medicare Part D claims for 19 patients. 92% of them were for generic drugs. CMS names the drug for 33 of them, across 3 drugs with 11 or more claims each, at $107 in total drug cost. In 2020, CMS named 12 claims across 1 drug.
Dr. Chun's Part D claims by kind of drug, 2024
- Generic49 claims92%
- Brand-name and other4 claims8%
Dr. Chun's most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Drug classes CMS tracks in Dr. Chun's Part D claims, 2024
- Antibiotics45%24 of 53 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2020 to 2024
- 2020
- 2024
- Claims for drugs CMS names
- 2020: 122024: 33175%
Drugs named by CMS: 3 in 2024, 1 in 2020.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
Dr. Jonathan Sehjin Chun scored 92 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 92 out of 100 for Dr. Chun for performance year 2024, reported as part of a group. Dr. Chun accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Dr. Chun's MIPS scores, performance year 2024
- 92of 100Final score
- 84.7of 100Quality
- 100of 100Promoting Interoperability
- 40of 100Improvement Activities
- 79of 100Cost
Each score is out of 100. The final score weighs the categories CMS scored for this clinician.
Colonoscopy: 1 to 10 procedures (CMS shows small counts as a range)
Sources: Doctors and Clinicians National Downloadable File (CMS); Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026; and Doctors and Clinicians Utilization Data (CMS)
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Dr. Jonathan Sehjin Chun received $10,223 in industry payments from 2016 to 2025
CMS Open Payments shows 36 general payments to Dr. Chun from 3 drug and device companies from 2016 to 2025. Education make up the largest share, 61% of the total. Intuitive Surgical, Inc. paid the most, $10,173.
General payments to Dr. Chun by program year, 2016 to 2025
General payments to Dr. Chun by kind, 2016 to 2025
- Education$6,25061%
- Travel and lodging$2,79527%
- Food and beverage$1,16311%
- Gifts$150%
Companies that paid Dr. Chun the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Jonathan Sehjin Chun graduated from Washington University School of Medicine
Dr. Chun graduated from Washington University School of Medicine in 2001.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Jonathan Sehjin Chun's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDmand AI Org Hierarchy Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Clinician Public Reporting: Overall MIPS Performance (CMS) (opens in a new tab)Doctors and Clinicians Utilization Data (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Jonathan Sehjin Chun
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. Jonathan Sehjin Chun's NPI number?
Dr. Jonathan Sehjin Chun's NPI number is 1396777926. It was assigned on July 6, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Jonathan Sehjin Chun?
Dr. Jonathan Sehjin Chun is a general surgeon in Portland, Oregon. The primary specialty in the NPI Registry is Surgery Physician (taxonomy code 208600000X).
Where does Dr. Jonathan Sehjin Chun practice?
Dr. Chun practices at 10123 Se Market Street, Portland, OR 97216. Dr. Chun's primary practice is Adventist Health Portland in Portland, Oregon, part of Adventist Health. Dmand AI also links Dr. Chun to 2 group practices and clinics and 1 medical group.
What is Dr. Jonathan Sehjin Chun's office phone number?
The practice phone on file for Dr. Chun is (503) 257-2500.
What is Dr. Jonathan Sehjin Chun's medical license number?
Dr. Chun holds Oregon license MD176699, one of the licenses on file in 6 states.
Which states has Dr. Jonathan Sehjin Chun been licensed in?
Dmand AI has state licenses on file for Dr. Chun in Oregon, Kentucky, Maryland, Missouri, Washington and Wisconsin.
Which hospitals is Dr. Jonathan Sehjin Chun affiliated with?
Dr. Chun practices at Adventist Health Portland in Portland, Oregon. Dr. Chun is also affiliated with OHSU Hospital.
What medical group is Dr. Jonathan Sehjin Chun part of?
Dr. Chun is linked to Adventist Health Portland. Dmand AI links Dr. Chun to 1 more medical group.
Does Dr. Jonathan Sehjin Chun accept Medicare?
Yes. CMS data shows Dr. Chun billed Medicare for 25 services in 2024, and Dr. Chun accepts Medicare assignment.
What is Dr. Jonathan Sehjin Chun's MIPS score?
Dr. Chun's MIPS final score for performance year 2024 is 92 out of 100, reported as part of a group.
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How many Medicare patients does Dr. Jonathan Sehjin Chun see?
CMS counts 45 Medicare patients who saw Dr. Chun in 2024, with an average age of 67.
What services does Dr. Jonathan Sehjin Chun bill to Medicare?
In 2024, Dr. Chun's most billed Medicare services were surgery: digestive system (46600) and office visit, new patient (99203).
Where did Dr. Jonathan Sehjin Chun go to medical school?
Dr. Chun graduated from Washington University School of Medicine in 2001.
What drugs does Dr. Jonathan Sehjin Chun prescribe most?
In 2024 Medicare Part D data, Dr. Chun's most prescribed drugs by claims were Metronidazole, Neomycin Sulfate and Ondansetron HCl.
Has Dr. Jonathan Sehjin Chun received payments from drug or device companies?
CMS Open Payments shows $10,223 in general payments to Dr. Chun from 3 companies from 2016 to 2025. The largest total came from Intuitive Surgical, Inc.
How long has Dr. Jonathan Sehjin Chun been practicing?
Dr. Chun graduated from medical school in 2001, 25 years ago.
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