Dr. John Jah-Hyun Koo, MD
- Medicare patients, 2024
- 11
- Part D claims, 2024
- 419
- Industry payments
- $170
- Affiliated sites
- 1
- Medical group
- 1
- Practice address
- 500 NE Multnomah St, Portland, OR 97232
- Practice phone
- Call (503) 813-2440
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Kaiser Foundation Health Plan of the Northwest
Portland, Oregon
Find Dr. Koo'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. John Jah-Hyun Koo is an ophthalmologist in Portland, Oregon
Dr. Koo practices at Kaiser Foundation Health Plan of the Northwest in Portland, Oregon.
Dr. Koo's NPI, 1043356470, was assigned on January 30, 2007. Dr. Koo graduated from Yale University School of Medicine in 2003. Dr. Koo holds Oregon license MD151394.
- NPI
- 1043356470NPI Registry (opens in a new tab)
- Medicare PAC ID
- 9133297245
- NPI enumeration date
- January 30, 2007
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (503) 813-2440
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 49
- Medical school graduation
- 2003
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. John Jah-Hyun Koo practices at Kaiser Foundation Health Plan of the Northwest in Portland, Oregon
Dr. Koo's primary practice is Kaiser Foundation Health Plan of the Northwest, at 500 NE Multnomah St, Portland, OR 97232 in Multnomah County. The practice phone is (503) 813-2440.
- Kaiser Foundation Health Plan of the Northwest500 NE Multnomah St, Portland, OR 97232 · Multnomah CountyPhone(503) 813-2440
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. John Jah-Hyun Koo is affiliated with 2 sites of care and 1 medical group
Dr. Koo's primary practice is Kaiser Foundation Health Plan of the Northwest in Portland, Oregon. The medical group on file is Kaiser Permanente Northwest. Dmand AI also links Dr. Koo to 1 more group practice or clinic, named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. John Jah-Hyun Koo's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Koo practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Kaiser Foundation Health Plan of the Northwest | Available with a free account |
| +1 more affiliated site | 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 each health system and 6.2K+ hospitals, with verified contacts in the same login.
Dr. John Jah-Hyun Koo is one of 272 ophthalmologists in Oregon
Ophthalmology is Dr. Koo's primary specialty in the NPI Registry, under taxonomy code 207W00000X. Dmand AI has Dr. Koo's licenses on file in 2 states: Oregon and Maryland.
Specialties and state licenses
- Ophthalmology, OregonPrimary
- Maryland license
Ophthalmologists near Dr. Koo
Counts of ophthalmologists 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. John Jah-Hyun Koo treated 11 Medicare patients in 2024, average age 70
CMS counts 11 Medicare patients who saw Dr. Koo in 2024. The largest group is 85 and over, with 0 patients. Their average risk score is 1.02, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Koo's median patient age at 63, with 57% women.
Dr. Koo's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Koo's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 63
Patient panel by sex, all payers
- Women57%
- Men41%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. John Jah-Hyun Koo wrote 419 Medicare Part D claims in 2024
In 2024, Dr. Koo wrote 419 Medicare Part D claims for 311 patients. 93% of them were for generic drugs. CMS names the drug for 364 of them, across 5 drugs with 11 or more claims each, at $7,931 in total drug cost. In 2023, CMS named 322 claims across 6 drugs.
Dr. Koo's Part D claims by kind of drug, 2024
- Generic391 claims93%
- Brand-name and other28 claims7%
Dr. Koo'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.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 3222024: 36413%
Drugs named by CMS: 5 in 2024, 6 in 2023.
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
How Dr. John Jah-Hyun Koo takes part in Medicare
Dr. Koo accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
For MedTech and pharma teams
Filter 7.4M+ HCPs by Medicare procedures, Part D drugs and Open Payments history, then reach them with verified contacts in one login.
Dr. John Jah-Hyun Koo received $170 in industry payments from 2020 to 2023
CMS Open Payments shows 3 general payments to Dr. Koo from 2 drug and device companies from 2020 to 2023. Food and beverage make up the largest share, 100% of the total. Novartis Pharmaceuticals Corporation paid the most, $159.
General payments to Dr. Koo by program year, 2020 to 2023
Companies that paid Dr. Koo the most, 2020 to 2023
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. John Jah-Hyun Koo graduated from Yale University School of Medicine
Dr. Koo graduated from Yale University School of Medicine in 2003.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. John Jah-Hyun Koo'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 | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data |
| Primary practice, affiliations and health system | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand AI Affiliation Data |
| 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) |
| 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. John Jah-Hyun Koo
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. John Jah-Hyun Koo's NPI number?
Dr. John Jah-Hyun Koo's NPI number is 1043356470. It was assigned on January 30, 2007, and it is active in the NPI Registry.
What kind of doctor is Dr. John Jah-Hyun Koo?
Dr. John Jah-Hyun Koo is an ophthalmologist in Portland, Oregon. The primary specialty in the NPI Registry is Ophthalmology Physician (taxonomy code 207W00000X).
Where does Dr. John Jah-Hyun Koo practice?
Dr. Koo practices at 500 NE Multnomah St, Portland, OR 97232. Dr. Koo's primary practice is Kaiser Foundation Health Plan of the Northwest in Portland, Oregon. Dmand AI also links Dr. Koo to 1 group practice or clinic.
What is Dr. John Jah-Hyun Koo's office phone number?
The practice phone on file for Dr. Koo is (503) 813-2440.
What is Dr. John Jah-Hyun Koo's medical license number?
Dr. Koo holds Oregon license MD151394, one of the licenses on file in 2 states.
Which states has Dr. John Jah-Hyun Koo been licensed in?
Dmand AI has state licenses on file for Dr. Koo in Oregon and Maryland.
What medical group is Dr. John Jah-Hyun Koo part of?
Dr. Koo is linked to Kaiser Permanente Northwest.
Does Dr. John Jah-Hyun Koo accept Medicare?
Yes. CMS lists Dr. Koo as accepting Medicare assignment.
How many Medicare patients does Dr. John Jah-Hyun Koo see?
CMS counts 11 Medicare patients who saw Dr. Koo in 2024, with an average age of 70.
Where did Dr. John Jah-Hyun Koo go to medical school?
Dr. Koo graduated from Yale University School of Medicine in 2003.
Show 3 more questionsShow fewer questions
What drugs does Dr. John Jah-Hyun Koo prescribe most?
In 2024 Medicare Part D data, Dr. Koo's most prescribed drugs by claims were Neomycin-Polymyxin-Dexameth, Erythromycin and Fluorometholone.
Has Dr. John Jah-Hyun Koo received payments from drug or device companies?
CMS Open Payments shows $170 in general payments to Dr. Koo from 2 companies from 2020 to 2023. The largest total came from Novartis Pharmaceuticals Corporation.
How long has Dr. John Jah-Hyun Koo been practicing?
Dr. Koo graduated from medical school in 2003, 23 years ago.
Selling to ophthalmology practices?
See ophthalmologists in Oregon by site of care and group
Find the practices, groups and hospitals they work with, and the right people to contact at each.
- 30 days free
- Self-serve
- No credit card