THAO HONG PHAN M.D.
NPI 1306849807
Specialist in Union City, CA
About Thao Hong Phan M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
THAO HONG PHAN M.D. (NPI 1306849807) is an individual specialist in Union City, California, licensed in California (A90577) and active in the NPI registry since May 2005. He is enrolled in Medicare PECOS and is a graduate of Other (2001).
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
Thao Hong Phan M.d. 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 Thao Phan reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Redwood City, CA 94063
- Reassigned Medicare billing, California enrollment
- 20,078 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.
UNION CITY, CA 94587
UNION CITY, CA 94587
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 Thao Phan's NPI number?
The NPI number for Thao Phan is 1306849807. It was assigned to this individual provider in the NPPES registry on May 27, 2005.
Where is Thao Phan located?
Thao Phan practices at 3553 Whipple Rd, Union City, CA 94587. The listed phone number is (510) 454-1000.
What is Thao Phan's specialty?
The primary specialty registered for this NPI is Specialist with taxonomy code 174400000X.
Is Thao Phan enrolled in Medicare?
Yes. Thao Phan 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 Thao Phan's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Thao Phan reassigns Medicare benefits to Permanente Medical Group Inc (Redwood City, 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 Thao Phan'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 Thao Phan 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.
# Thao Hong Phan, M.D. · NPI 1306849807
Specialist provider in Union City, California. Individual provider, active in the CMS NPPES registry since May 27, 2005.
## Identity
- **NPI:** 1306849807 (Entity type: Individual)
- **Enumerated:** May 27, 2005
- **Primary specialty:** Specialist · taxonomy 174400000X
- **State license:** A90577 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 3553 WHIPPLE RD, Union City, CA 94587-1507
- **Phone:** (510) 454-1000
## 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:** Permanente Medical Group Inc (NPI 1639252604, Redwood City, CA), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2001
## Record status
- **NPPES last updated:** December 13, 2021
---
Source: [NPI Profile](https://npiprofile.com/npi/1306849807) · Data from the CMS NPPES public registry.