MR. JOHN JAH-HYUN KOO MD
NPI 1043356470
Ophthalmology in Portland, OR
About Mr. John Jah-hyun Koo Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MR. JOHN JAH-HYUN KOO MD (NPI 1043356470) is an individual ophthalmology provider in Portland, Oregon, licensed in Oregon (MD151394) and active in the NPI registry since January 2007. He is enrolled in Medicare PECOS and is a graduate of Yale University School Of Medicine (2003).
NPPES Registry Identity
Specialties & Licenses
Other Names 1
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Mr. John Jah-hyun Koo Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignment
Medicare enrollment records show John Koo reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Portland, OR 97227
- Reassigned Medicare billing, Oregon and Washington enrollments
- Also billed through NPI 1184786527 (Washington)
- 3,207 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 97227 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is John Koo's NPI number?
The NPI number for John Koo is 1043356470. It was assigned to this individual provider in the NPPES registry on January 30, 2007. The provider is also known as Dr. Jah-Hyun Koo MD.
Where is John Koo located?
John Koo practices at 3600 N. Interstate Avenue Department Of Opthalmology, Portland, OR 97227. The listed phone number is (503) 331-6330.
What is John Koo's specialty?
The primary specialty registered for this NPI is Ophthalmology with taxonomy code 207W00000X.
Is John Koo enrolled in Medicare?
Yes. John Koo is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organization bills Medicare for John Koo's services?
According to the CMS Revalidation Reassignment List (October 2026 release), John Koo reassigns Medicare benefits to Kaiser Foundation Health Plan Of The Northwest (Portland, OR). The reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for John Koo's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does John Koo accept?
Health plans from Kaiser Permanente list John Koo as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.
When was this NPI record last updated?
The NPPES record for John Koo was last updated on September 21, 2010. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 16 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.
# Mr. John Jah-Hyun Koo, MD · NPI 1043356470
Ophthalmology physician in Portland, Oregon. Individual provider, active in the CMS NPPES registry since January 30, 2007.
## Identity
- **NPI:** 1043356470 (Entity type: Individual)
- **Enumerated:** January 30, 2007
- **Primary specialty:** Ophthalmology · taxonomy 207W00000X
- **State license:** MD151394 (Oregon)
- **Sole proprietor:** No
## Practice location
- **Address:** 3600 N. INTERSTATE AVENUE, DEPARTMENT OF OPTHALMOLOGY, Portland, OR 97227
- **Phone:** (503) 331-6330 · **Fax:** (503) 571-5877
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** Kaiser Foundation Health Plan Of The Northwest (NPI 1093043424, Portland, OR), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Yale University School Of Medicine, class of 2003
## Record status
- **NPPES last updated:** September 21, 2010
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Source: [NPI Profile](https://npiprofile.com/npi/1043356470) · Data from the CMS NPPES public registry.