PHONG H BUI INC
NPI 1770909830
Internal Medicine - Endocrinology, Diabetes & Metabolism in Fountain Valley, CA
About Phong H Bui Inc NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
PHONG H BUI INC (NPI 1770909830) is a healthcare organization registered as an endocrinology, diabetes & metabolism in Fountain Valley, California and active in the NPI registry since March 2014. The organization lists Phong H Bui, Md/president, as its authorized official.
NPPES Registry Identity
Specialties & Licenses 2
Other Names 1
Other Identifiers 1
Group Practice 2
Medicare Participation & PECOS CMS
Medicare enrollment, revalidation and the clinicians who bill Medicare through this organization, from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Phong H Bui Inc is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Revalidation Due Date
Revalidation due by November 30, 2026
Medicare-enrolled providers and suppliers confirm their enrollment information with CMS on a set cycle, every 5 years for most and every 3 years for medical equipment suppliers. CMS sets the due date for each enrollment.
Clinicians Billing Medicare Through This Organization
3Medicare enrollment records show 3 clinicians reassign Medicare billing to Phong H Bui Inc, which bills Medicare for the services they deliver. Of these, 1 practice at this address and 2 within 10 miles. They are listed nearest first.
Clinicians, nearest first (3)
Fountain Valley, CA 92708
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
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 Phong H Bui Inc's NPI number?
The NPI number for Phong H Bui Inc is 1770909830. It was assigned to this organization in the NPPES registry on March 13, 2014.
Where is Phong H Bui Inc located?
Phong H Bui Inc is located at 16055 Brookhurst St Suite C, Fountain Valley, CA 92708. The listed phone number is (714) 839-2400.
What is Phong H Bui Inc's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Endocrinology, Diabetes & Metabolism, with taxonomy code 207RE0101X.
Is Phong H Bui Inc enrolled in Medicare?
Yes. Phong H Bui Inc is registered in the Medicare PECOS enrollment system.
When is Phong H Bui Inc's Medicare revalidation due?
According to the CMS Revalidation Due Date List (October 2026 release), the Medicare Non-DME Part B enrollment for this organization (California, Clinic/Group Practice) is due for revalidation by November 30, 2026. Medicare providers and suppliers revalidate their enrollment every 5 years, and medical equipment suppliers every 3 years. Confirm current requirements with your Medicare Administrative Contractor.
How many clinicians bill Medicare through Phong H Bui Inc?
According to the CMS Revalidation Reassignment List (October 2026 release), 3 clinicians reassign their Medicare billing to Phong H Bui Inc, in Endocrinology, Internal Medicine and Nurse Practitioner. A 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 the clinician's services. Of these, 1 practice at this address and 2 within 10 miles. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
When was this NPI record last updated?
The NPPES record for Phong H Bui Inc was last updated on December 4, 2020. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 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.
# Phong H Bui Inc · NPI 1770909830
Endocrinology, Diabetes & Metabolism organization in Fountain Valley, California. Organization record, active in the CMS NPPES registry since March 13, 2014.
## Identity
- **NPI:** 1770909830 (Entity type: Organization)
- **Enumerated:** March 13, 2014
- **Primary specialty:** Internal Medicine - Endocrinology, Diabetes & Metabolism · taxonomy 207RE0101X
- **Organization subpart:** No
- **Authorized official:** Phong Bui, MD/PRESIDENT
## Practice location
- **Address:** 16055 BROOKHURST ST, SUITE C, Fountain Valley, CA 92708-1544
- **Phone:** (714) 839-2400 · **Fax:** (714) 839-2401
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Medicare revalidation due:** November 30, 2026 (Non-DME Part B, California, Clinic/Group Practice) · CMS Revalidation Due Date List, October 2026 release
- **Clinicians billing through this organization:** 3 clinicians in 3 Medicare specialties reassign Medicare billing to this organization (form CMS-855R); largest: Endocrinology (1), Internal Medicine (1), Nurse Practitioner (1); 1 practice at this address and 2 within 10 miles · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** December 4, 2020
- **Other identifiers:** Other A101682 (CA)
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Source: [NPI Profile](https://npiprofile.com/npi/1770909830) · Data from the CMS NPPES public registry.