DR. AILEEN BUI MD
NPI 1639673478
Internal Medicine - Gastroenterology in Duarte, CA
About Dr. Aileen Bui Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. AILEEN BUI MD (NPI 1639673478) is an individual gastroenterology provider in Duarte, California, licensed in California (A165723) and active in the NPI registry since March 2018. She is enrolled in Medicare PECOS and is a graduate of Warren Alpert Medical School Of Brown University (2018).
NPPES Registry Identity
Specialties & Licenses 2
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Dr. Aileen 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.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 91010 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.
DUARTE, CA 91010
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 Aileen Bui's NPI number?
The NPI number for Aileen Bui is 1639673478. It was assigned to this individual provider in the NPPES registry on March 19, 2018.
Where is Aileen Bui located?
Aileen Bui practices at 1500 Duarte Rd, Duarte, CA 91010. The listed phone number is (800) 826-4673.
What is Aileen Bui's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Gastroenterology, with taxonomy code 207RG0100X.
Is Aileen Bui enrolled in Medicare?
Yes. Aileen 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.
When was this NPI record last updated?
The NPPES record for Aileen Bui was last updated on July 17, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 13 months 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. Aileen Bui, MD · NPI 1639673478
Gastroenterology physician in Duarte, California. Individual provider, active in the CMS NPPES registry since March 19, 2018.
## Identity
- **NPI:** 1639673478 (Entity type: Individual)
- **Enumerated:** March 19, 2018
- **Primary specialty:** Internal Medicine - Gastroenterology · taxonomy 207RG0100X
- **State license:** A165723 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 1500 DUARTE RD, Duarte, CA 91010-3012
- **Phone:** (800) 826-4673
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Medical school:** Warren Alpert Medical School Of Brown University, class of 2018
## Record status
- **NPPES last updated:** July 17, 2025
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Source: [NPI Profile](https://npiprofile.com/npi/1639673478) · Data from the CMS NPPES public registry.