JUSTIN HYUCK-JIN JUNN MD
NPI 1164733358
Obstetrics & Gynecology in Stanford, CA
About Justin Hyuck-jin Junn Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
JUSTIN HYUCK-JIN JUNN MD (NPI 1164733358) is an individual obstetrics & gynecology provider in Stanford, California, licensed in California (C169249) and active in the NPI registry since June 2010. He is enrolled in Medicare PECOS, maintains a secondary practice location in Seattle, and is a graduate of University Of Michigan Medical School (2010).
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Location 1
Other Identifiers 1
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
Justin Hyuck-jin Junn 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 Reassignments
2Medicare enrollment records show Justin Junn reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Stanford, CA 94305
- Reassigned Medicare billing, California enrollment
- 4,258 clinicians in this Medicare group
Palo Alto, CA 94304
- Reassigned Medicare billing, California enrollment
- 3,617 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 94305 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Medicare Quality Performance CMS QPP · MIPS
Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.
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.
STANFORD, CA 94305
STANFORD, CA 94305
STANFORD, CA 94305
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 Justin Junn's NPI number?
The NPI number for Justin Junn is 1164733358. It was assigned to this individual provider in the NPPES registry on June 23, 2010.
Where is Justin Junn located?
Justin Junn practices at 300 Pasteur Dr, Stanford, CA 94305. The listed phone number is (650) 723-4000.
What is Justin Junn's specialty?
The primary specialty registered for this NPI is Obstetrics & Gynecology with taxonomy code 207V00000X.
Is Justin Junn enrolled in Medicare?
Yes. Justin Junn 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 Justin Junn's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Justin Junn reassigns Medicare benefits to 2 organizations: Stanford Health Care (Stanford, CA) and Lpch Medical Group Div Of Lucile (Palo Alto, 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 Justin Junn'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 Justin Junn was last updated on April 26, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 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.
# Justin Hyuck-Jin Junn, MD · NPI 1164733358
Obstetrics & Gynecology physician in Stanford, California. Individual provider, active in the CMS NPPES registry since June 23, 2010.
## Identity
- **NPI:** 1164733358 (Entity type: Individual)
- **Enumerated:** June 23, 2010
- **Primary specialty:** Obstetrics & Gynecology · taxonomy 207V00000X
- **State license:** C169249 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 300 PASTEUR DR, Stanford, CA 94305-2200
- **Phone:** (650) 723-4000
## 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): Stanford Health Care (NPI 1437292927, Stanford, CA); Lpch Medical Group Div Of Lucile (NPI 1417907940, Palo Alto, CA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of Michigan Medical School, class of 2010
## Record status
- **NPPES last updated:** April 26, 2024
- **Other identifiers:** Medicaid 1164733358 (WA)
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Source: [NPI Profile](https://npiprofile.com/npi/1164733358) · Data from the CMS NPPES public registry.