DR. KAREN YUAN WONG OD
NPI 1639698343
Student in an Organized Health Care Education/Training Program in Northport, NY
About Dr. Karen Yuan Wong Od NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. KAREN YUAN WONG OD (NPI 1639698343) is an individual student in an organized health care education/training program in Northport, New York and active in the NPI registry since September 2017. She is enrolled in Medicare PECOS and is a graduate of University Of California - School Of Optometry (2017).
NPPES Registry Identity
Specialties & Licenses
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
Dr. Karen Yuan Wong Od 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 Reassignments
2Medicare enrollment records show Karen Wong reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Stockton, CA 95210
- Reassigned Medicare billing, California enrollment
- 20,078 clinicians in this Medicare group
San Jose, CA 95118
- Reassigned Medicare billing, California enrollment
- 4 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.
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 Karen Wong's NPI number?
The NPI number for Karen Wong is 1639698343. It was assigned to this individual provider in the NPPES registry on September 13, 2017.
Where is Karen Wong located?
Karen Wong practices at 79 Middleviille Rd. Optometry 123, Northport, NY 11768. The listed phone number is (631) 261-4400.
What is Karen Wong's specialty?
The primary specialty registered for this NPI is Student in an Organized Health Care Education/Training Program with taxonomy code 390200000X.
Is Karen Wong enrolled in Medicare?
Yes. Karen Wong 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 organizations bill Medicare for Karen Wong's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Karen Wong reassigns Medicare benefits to 2 organizations: Permanente Medical Group Inc (Stockton, CA) and Keith D. Chow, O. D., Inc. (San Jose, CA). Each 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 Karen Wong's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
When was this NPI record last updated?
The NPPES record for Karen Wong was last updated on December 29, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 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.
# Dr. Karen Yuan Wong, OD · NPI 1639698343
Student in an Organized Health Care Education/Training Program provider in Northport, New York. Individual provider, active in the CMS NPPES registry since September 13, 2017.
## Identity
- **NPI:** 1639698343 (Entity type: Individual)
- **Enumerated:** September 13, 2017
- **Primary specialty:** Student in an Organized Health Care Education/Training Program · taxonomy 390200000X
- **Sole proprietor:** No
## Practice location
- **Address:** 79 MIDDLEVIILLE RD., OPTOMETRY 123, Northport, NY 11768
- **Phone:** (631) 261-4400
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health
- **Bills Medicare through:** 2 organizations under Medicare reassignment (form CMS-855R): Permanente Medical Group Inc (NPI 1548343510, Stockton, CA); Keith D. Chow, O. D., Inc. (NPI 1679525760, San Jose, CA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of California - School Of Optometry, class of 2017
## Record status
- **NPPES last updated:** December 29, 2021
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Source: [NPI Profile](https://npiprofile.com/npi/1639698343) · Data from the CMS NPPES public registry.