YOON YOUNG KO DO
NPI 1396304457
Family Medicine in Tracy, CA
About Yoon Young Ko Do NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
YOON YOUNG KO DO (NPI 1396304457) is an individual family medicine provider in Tracy, California, licensed in California (20A20130) and active in the NPI registry since June 2019. She is enrolled in Medicare PECOS, maintains 2 additional practice locations, and is a graduate of Touro Un Col Of Osteopathic Medicine, New York (2019).
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Locations 2
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
Yoon Young Ko Do 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 Yoon Ko 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
Modesto, CA 95355
- Reassigned Medicare billing, California enrollment
- 3,056 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 95376 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Other Providers at the Same Location NPPES 2
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
TRACY, CA 95376
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 Yoon Ko's NPI number?
The NPI number for Yoon Ko is 1396304457. It was assigned to this individual provider in the NPPES registry on June 11, 2019.
Where is Yoon Ko located?
Yoon Ko practices at 599 E Valpico Rd, Tracy, CA 95376. The listed phone number is (209) 830-4072.
What is Yoon Ko's specialty?
The primary specialty registered for this NPI is Family Medicine with taxonomy code 207Q00000X.
Is Yoon Ko enrolled in Medicare?
Yes. Yoon Ko 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 Yoon Ko's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Yoon Ko reassigns Medicare benefits to 2 organizations: Permanente Medical Group Inc (Stockton, CA) and Sutter Valley Medical Foundation (Modesto, 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 Yoon Ko'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 Yoon Ko was last updated on November 4, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 11 months 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.
# Yoon Young Ko, DO · NPI 1396304457
Family Medicine physician in Tracy, California. Individual provider, active in the CMS NPPES registry since June 11, 2019.
## Identity
- **NPI:** 1396304457 (Entity type: Individual)
- **Enumerated:** June 11, 2019
- **Primary specialty:** Family Medicine · taxonomy 207Q00000X
- **State license:** 20A20130 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 599 E VALPICO RD, Tracy, CA 95376
- **Phone:** (209) 830-4072 · **Fax:** (209) 454-3191
## 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:** 2 organizations under Medicare reassignment (form CMS-855R): Permanente Medical Group Inc (NPI 1548343510, Stockton, CA); Sutter Valley Medical Foundation (NPI 1669846986, Modesto, CA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Touro Un Col Of Osteopathic Medicine, New York, class of 2019
## Record status
- **NPPES last updated:** November 4, 2025
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Source: [NPI Profile](https://npiprofile.com/npi/1396304457) · Data from the CMS NPPES public registry.