GINA JEE YOON CHANG MD
NPI 1164044855
Psychiatry & Neurology - Neuromuscular Medicine in Palo Alto, CA
About Gina Jee Yoon Chang Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
GINA JEE YOON CHANG MD (NPI 1164044855) is an individual neuromuscular medicine provider in Palo Alto, California, licensed in California (A200629) and active in the NPI registry since May 2020. She is enrolled in Medicare PECOS, maintains a secondary practice location in San Francisco, and is a graduate of Perelman School Of Med At The University Of Pennsylvania (2020).
NPPES Registry Identity
Specialties & Licenses 4
Secondary Practice Location 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
Gina Jee Yoon Chang 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 Gina Chang reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
San Francisco, CA 94143
- Reassigned Medicare billing, California enrollment
- 5,645 clinicians in this Medicare group
San Francisco, CA 94122
- Reassigned Medicare billing, California enrollment
- 5,544 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.
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.
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 Gina Chang's NPI number?
The NPI number for Gina Chang is 1164044855. It was assigned to this individual provider in the NPPES registry on May 15, 2020.
Where is Gina Chang located?
Gina Chang practices at 725 Welch Rd, Palo Alto, CA 94304. The listed phone number is (650) 497-8000.
What is Gina Chang's specialty?
The primary specialty registered for this NPI is Psychiatry & Neurology, specializing in Neuromuscular Medicine, with taxonomy code 2084N0008X.
Is Gina Chang enrolled in Medicare?
Yes. Gina Chang 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 Gina Chang's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Gina Chang reassigns Medicare benefits to 2 organizations: University Of California San Francisco (San Francisco, CA) and Ucsf Medical Group Business Services (San Francisco, 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 Gina Chang'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 Gina Chang was last updated on September 21, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 35 days 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.
# Gina Jee Yoon Chang, MD · NPI 1164044855
Neuromuscular Medicine physician in Palo Alto, California. Individual provider, active in the CMS NPPES registry since May 15, 2020.
## Identity
- **NPI:** 1164044855 (Entity type: Individual)
- **Enumerated:** May 15, 2020
- **Primary specialty:** Psychiatry & Neurology - Neuromuscular Medicine · taxonomy 2084N0008X
- **State license:** A200629 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 725 WELCH RD, Palo Alto, CA 94304-1601
- **Phone:** (650) 497-8000
## 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): University Of California San Francisco (NPI 1346329380, San Francisco, CA); Ucsf Medical Group Business Services (NPI 1477624104, San Francisco, CA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Perelman School Of Med At The University Of Pennsylvania, class of 2020
## Record status
- **NPPES last updated:** September 21, 2026
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Source: [NPI Profile](https://npiprofile.com/npi/1164044855) · Data from the CMS NPPES public registry.