DR. DIEM K BUI M.D.
NPI 1124318167
Ophthalmology in Atlanta, GA
About Dr. Diem K Bui M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. DIEM K BUI M.D. (NPI 1124318167) is an individual ophthalmology provider in Atlanta, Georgia, licensed in California (A156155) and active in the NPI registry since April 2011. She is enrolled in Medicare PECOS and is a graduate of University Of California, Geffen School Of Medicine (2011).
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. Diem K Bui 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 Diem Bui reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Stockton, CA 95210
- 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.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 30322 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.
ATLANTA, GA 30322
ATLANTA, GA 30322
ATLANTA, GA 30322
ATLANTA, GA 30322
ATLANTA, GA 30322
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 Diem Bui's NPI number?
The NPI number for Diem Bui is 1124318167. It was assigned to this individual provider in the NPPES registry on April 11, 2011.
Where is Diem Bui located?
Diem Bui practices at 1365B Clifton Rd NE, Atlanta, GA 30322. The listed phone number is (404) 778-2020.
What is Diem Bui's specialty?
The primary specialty registered for this NPI is Ophthalmology with taxonomy code 207W00000X.
Is Diem Bui enrolled in Medicare?
Yes. Diem 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 Diem Bui's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Diem Bui reassigns Medicare benefits to Permanente Medical Group Inc (Stockton, 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 Diem 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 Diem Bui was last updated on January 26, 2022. 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.
# Dr. Diem K Bui, M.D. · NPI 1124318167
Ophthalmology physician in Atlanta, Georgia. Individual provider, active in the CMS NPPES registry since April 11, 2011.
## Identity
- **NPI:** 1124318167 (Entity type: Individual)
- **Enumerated:** April 11, 2011
- **Primary specialty:** Ophthalmology · taxonomy 207W00000X
- **State license:** A156155 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 1365B CLIFTON RD NE, Atlanta, GA 30322-1013
- **Phone:** (404) 778-2020
## 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 1548343510, Stockton, CA), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of California, Geffen School Of Medicine, class of 2011
## Record status
- **NPPES last updated:** January 26, 2022
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Source: [NPI Profile](https://npiprofile.com/npi/1124318167) · Data from the CMS NPPES public registry.