DR. ESTHER M YUN MD
NPI 1992951214
Obstetrics & Gynecology in San Jose, CA
About Dr. Esther M Yun Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. ESTHER M YUN MD (NPI 1992951214) is an individual obstetrics & gynecology provider in San Jose, California, licensed in California (A133166) and active in the NPI registry since August 2008. She is enrolled in Medicare PECOS and is a graduate of Other (2006).
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. Esther M Yun 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 Esther Yun reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
San Jose, CA 95124
- Reassigned Medicare billing, California enrollment
- Also billed through NPI 1982845186 (California), NPI 1013950807 (California)
- 393 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 95124 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 15
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
SAN JOSE, CA 95124
SAN JOSE, CA 95124
SAN JOSE, CA 95124
SAN JOSE, CA 95124
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 Esther Yun's NPI number?
The NPI number for Esther Yun is 1992951214. It was assigned to this individual provider in the NPPES registry on August 18, 2008.
Where is Esther Yun located?
Esther Yun practices at 2400 Samaritan Dr Suite 105/Suite 203, San Jose, CA 95124. The listed phone number is (408) 523-3870.
What is Esther Yun's specialty?
The primary specialty registered for this NPI is Obstetrics & Gynecology with taxonomy code 207V00000X.
Is Esther Yun enrolled in Medicare?
Yes. Esther Yun 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 Esther Yun's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Esther Yun reassigns Medicare benefits to Sutter Bay Medical Foundation (San Jose, 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 Esther Yun'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 Esther Yun was last updated on March 30, 2016. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 10 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. Esther M Yun, MD · NPI 1992951214
Obstetrics & Gynecology physician in San Jose, California. Individual provider, active in the CMS NPPES registry since August 18, 2008.
## Identity
- **NPI:** 1992951214 (Entity type: Individual)
- **Enumerated:** August 18, 2008
- **Primary specialty:** Obstetrics & Gynecology · taxonomy 207V00000X
- **State license:** A133166 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 2400 SAMARITAN DR, SUITE 105/SUITE 203, San Jose, CA 95124-3910
- **Phone:** (408) 523-3870
## 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:** Sutter Bay Medical Foundation (NPI 1043654486, San Jose, CA), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2006
## Record status
- **NPPES last updated:** March 30, 2016
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Source: [NPI Profile](https://npiprofile.com/npi/1992951214) · Data from the CMS NPPES public registry.