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YOOJIN KOH MD
NPI 1366520173
Obstetrics & Gynecology in Vallejo, CA

Active since November 01, 2006PECOS EnrolledAccepts Medicare Assignment
975 SERENO DR, VALLEJO, CA 94589(707) 651-1000 Get Directions Write a Review

NPPES record last updated: December 13, 2021. Verified against the NPPES registry weekly; last sync: October 25, 2026.

About Yoojin Koh Md NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

YOOJIN KOH MD (NPI 1366520173) is an individual obstetrics & gynecology provider in Vallejo, California, licensed in California (A82797) and active in the NPI registry since November 2006. She is enrolled in Medicare PECOS and is a graduate of Ohio State University College Of Medicine (2001).

NPPES Registry Identity

NPI1366520173
Entity TypeIndividualFemale
Primary Taxonomy207V00000X
Provider Legal NameYOOJIN KOHCredential: MD
Location Address975 SERENO DRVallejo, CA 94589-2441
Mailing Address1800 Harrison St Fl 7Oakland, CA 94612-3466 · (510) 625-6262
Phone(707) 651-1000
Sole ProprietorNo
Medical School CMSOhio State University College Of MedicineGraduated 2001
Enumeration DateNovember 1, 2006
Last NPPES UpdateDecember 13, 2021
✔ NPI 1366520173 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyObstetrics & GynecologyAllopathic & Osteopathic Physicians
Taxonomy Code207V00000X
License✔ Licensed in CA · A82797
Definition
An obstetrician/gynecologist possesses special knowledge, skills and professional capability in the medical and surgical care of the female reproductive system and associated disorders. This physician serves as a consultant to other physicians and as a primary physician for women.
975 SERENO DR, Vallejo, CA 94589
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Other Identifiers 1

Medicaid00A827970CA

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

Yoojin Koh 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.

PECOS PAC ID2567478662
PECOS Enrollment IDI20060227000690
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignment

Medicare enrollment records show Yoojin Koh reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Permanente Medical Group Inc
0.1 mi
Internal Medicine
975 SERENO DRIVE
Vallejo, CA 94589
  • Reassigned Medicare billing, California enrollment
  • 20,078 clinicians in this Medicare group
NPI 1336222397 (707) 651-1000

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 94589 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$145.83 typical visit price
range $65.02 – $191.95
Typical copayment $36.45 (range $16.25 – $47.98)
Most-billed visit code 99204
Established Patient
$80.24 typical visit price
range $21.86 – $157.69
Typical copayment $20.06 (range $5.46 – $39.42)
Most-billed visit code 99213
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

DR. ROBERTA YIWUN WANG M.D.
Physical Medicine & Rehabilitation
975 SERENO DR
VALLEJO, CA 94589
Napa County (707) 651-5128
RIHONG ZHOU
Pharmacist
975 SERENO DR
VALLEJO, CA 94589
Napa County (707) 651-2072
EVAN HIRSCHBEIN
Student in an Organized Health Care Education/Training Program
975 SERENO DR
VALLEJO, CA 94589
Napa County (707) 339-2074
MS. JEAN BROADNAX LCSW
Social Worker (Clinical)
975 SERENO DR
VALLEJO, CA 94589
Napa County (707) 651-4423
SEAN NISAM
Student in an Organized Health Care Education/Training Program
975 SERENO DR
VALLEJO, CA 94589
Napa County (707) 651-4071
LI M. TSANG MD
Anesthesiology
975 SERENO DR
VALLEJO, CA 94589
Napa County (707) 651-1000
DONN R. ERICKSON MD
Family Medicine
975 SERENO DR
VALLEJO, CA 94589
Napa County (707) 651-1000
JOHN S. WOOD MD
Surgery
975 SERENO DR
VALLEJO, CA 94589
Napa County (707) 651-1000

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 Yoojin Koh's NPI number?

The NPI number for Yoojin Koh is 1366520173. It was assigned to this individual provider in the NPPES registry on November 1, 2006.

Where is Yoojin Koh located?

Yoojin Koh practices at 975 Sereno Dr, Vallejo, CA 94589. The listed phone number is (707) 651-1000.

What is Yoojin Koh's specialty?

The primary specialty registered for this NPI is Obstetrics & Gynecology with taxonomy code 207V00000X.

Is Yoojin Koh enrolled in Medicare?

Yes. Yoojin Koh 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 Yoojin Koh's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Yoojin Koh reassigns Medicare benefits to Permanente Medical Group Inc (Vallejo, CA). 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 Yoojin Koh'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 Yoojin Koh was last updated on December 13, 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.