LYNN DUONG BUI MD
NPI 1265448419
Emergency Medicine in San Francisco, CA
About Lynn Duong Bui Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
LYNN DUONG BUI MD (NPI 1265448419) is an individual emergency medicine provider in San Francisco, California, licensed in California (A55757) and active in the NPI registry since July 2006. She is enrolled in Medicare PECOS and is a graduate of University Of California, Irvine, California College Of Medicine (1994).
NPPES Registry Identity
Specialties & Licenses 2
Other Identifiers 2
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
Lynn Duong Bui 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 Lynn Bui reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
San Francisco, CA 94116
- 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.
Areas of Expertise CMS Part B claims 2
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 94110 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 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
SAN FRANCISCO, CA 94110
SAN FRANCISCO, CA 94110
SAN FRANCISCO, CA 94110
SAN FRANCISCO, CA 94110
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 Lynn Bui's NPI number?
The NPI number for Lynn Bui is 1265448419. It was assigned to this individual provider in the NPPES registry on July 31, 2006.
Where is Lynn Bui located?
Lynn Bui practices at 1001 Potrero Ave Rm 1e21, San Francisco, CA 94110. The listed phone number is (415) 206-5753.
What is Lynn Bui's specialty?
The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.
Is Lynn Bui enrolled in Medicare?
Yes. Lynn Bui 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 Lynn Bui's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Lynn Bui reassigns Medicare benefits to Permanente Medical Group Inc (San Francisco, 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 Lynn Bui'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 Lynn Bui was last updated on December 6, 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.
# Lynn Duong Bui, MD · NPI 1265448419
Emergency Medicine physician in San Francisco, California. Individual provider, active in the CMS NPPES registry since July 31, 2006.
## Identity
- **NPI:** 1265448419 (Entity type: Individual)
- **Enumerated:** July 31, 2006
- **Primary specialty:** Emergency Medicine · taxonomy 207P00000X
- **State license:** A55757 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 1001 POTRERO AVE, RM 1E21, San Francisco, CA 94110-3518
- **Phone:** (415) 206-5753 · **Fax:** (415) 206-5818
## 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 1841373800, San Francisco, CA), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of California, Irvine, California College Of Medicine, class of 1994
## Record status
- **NPPES last updated:** December 6, 2021
- **Other identifiers:** Other 930100759 (CA); Medicaid OOA557570 (CA)
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Source: [NPI Profile](https://npiprofile.com/npi/1265448419) · Data from the CMS NPPES public registry.