John Jah-Hyun Koo, MD
Ophthalmology Physician · Portland, OR
John Jah-Hyun Koo, MD is an ophthalmology physician with a practice address in Portland, Oregon, and NPI 1043356470, issued on Jan 30, 2007. Check the license (Oregon MD151394, as entered in NPPES) on the Oregon Medical Board; the Medicare figures below come from public CMS files.
- Name
- John Jah-Hyun Koo
- Credential
- MD
- Primary taxonomy
- Ophthalmology Physician 207W00000X
- License numbers
- MD151394 OR
D0066681 MD
Self-reported in NPPES; status is on the state search - Practice location
- 3600 N. Interstate Avenue, Portland, OR 97227
- Phone
- (503) 331-6330
- Enumerated
- Jan 30, 2007
- Record last updated
- Sep 21, 2010 (not updated in 16 years: call before relying on the address or phone)
- Fax
- (503) 571-5877
- Medicare enrollment
- Enrolled (PECOS I20101208001135); accepts Medicare assignment
- Medical or professional school
- Yale University School Of Medicine, 2003
- Entity
- Type 1 · individual
8 nearest ophthalmology physician records → All 322 in Oregon → Look up another NPI →
Verify John Jah-Hyun Koo in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersOregon Medical Board
Search for license MD151394Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
72% fewer Medicare Part D claims than the average ophthalmology physician in 2024
419 Medicare Part D claims for 311 beneficiaries, against an average of 1,518 among the 16,459 providers of this specialty who prescribed in Part D.
Most prescribed
- Neomycin-Polymyxin-Dexameth297 claims
- Erythromycin28 claims
- Fluorometholone15 claims
- Claravis12 claims
- Prednisolone Acetate12 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Bills Medicare through one group practice
- Kaiser Foundation Health Plan OF The NorthwestClackamas, OR
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
John Jah-Hyun Koo among 322 ophthalmology physician records in Oregon
John Jah-Hyun Koo, MD is one of 322 ophthalmology physician records with a practice address in Oregon. 67% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 55% of them.
- NPI issued2007 · 55% of these records are older, 37% newer
- In a Medicare fileYes · 67% of these records are
- In the CMS Doctors and Clinicians fileYes · 59% of these records are
- Graduated2003 · median 2007 among the 189 with a school on file
- Record last updated2010 · 63% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207W00000X and a Oregon practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Ophthalmology Physician providers in Oregon
There are 322 ophthalmology physician records in Oregon.
All 322 in Oregon → Every provider in Portland → Ophthalmology Physician nationwide →
The 8 ophthalmology physician records with the nearest ZIP codes
- Diana Bennett, MDPortland, OR 972271770676355
- Melinda Binkley, M.D.Portland, OR 972271508209040
- Anthony Cirino, M.D.Portland, OR 972271235245218
- William Harris, MDPortland, OR 972271902908767
- Griffin Jardine, M.D.Portland, OR 972271811280787
- Rachel Landon, M.D.Portland, OR 972271578664223
- Wayne Lo, MDPortland, OR 972271356373047
- Michael May, M.D.Portland, OR 972271649380874
Common questions
What is John Jah-Hyun Koo, MD's NPI number?
John Jah-Hyun Koo, MD's National Provider Identifier (NPI) is 1043356470, issued on Jan 30, 2007. An NPI identifies a provider in billing; it is not a license.
Where is John Jah-Hyun Koo, MD located?
The NPPES record lists a practice address at 3600 N. Interstate Avenue, Portland, OR, 97227. Phone: (503) 331-6330. Providers update this record themselves, so call before visiting.
How can I verify John Jah-Hyun Koo, MD's license?
NPPES lists Oregon license number MD151394, as entered by the provider. Search the Oregon Medical Board at https://www.oregon.gov/OMB/Pages/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does John Jah-Hyun Koo, MD prescribe under Medicare Part D?
In 2024, John Jah-Hyun Koo, MD had 419 Medicare Part D claims for 311 beneficiaries; the average among ophthalmology physician prescribers was 1,518. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.