DR. DIANE T BUI D.O.
NPI 1700077245
Internal Medicine in Murrieta, CA
About Dr. Diane T Bui D.o. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. DIANE T BUI D.O. (NPI 1700077245) is an individual internal medicine provider in Murrieta, California, licensed in California (20A9296) and active in the NPI registry since August 2007. She is enrolled in Medicare PECOS.
NPPES Registry Identity
Specialties & Licenses
Other Identifiers 3
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Dr. Diane T Bui D.o. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignments
4Medicare enrollment records show Diane Bui reassigns Medicare billing to 4 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Murrieta, CA 92563
- Reassigned Medicare billing, California enrollment
- 48 clinicians in this Medicare group
Murrieta, CA 92562
- Reassigned Medicare billing, California enrollment
- 962 clinicians in this Medicare group
San Luis Obispo, CA 93401
- Reassigned Medicare billing, California enrollment
- 182 clinicians in this Medicare group
Merced, CA 95340
- Reassigned Medicare billing, California enrollment
- 126 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 92563 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Medicare Quality Performance CMS QPP · MIPS
Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.
Reported Quality Measures
Other Providers at the Same Location NPPES 7
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
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 Diane Bui's NPI number?
The NPI number for Diane Bui is 1700077245. It was assigned to this individual provider in the NPPES registry on August 8, 2007.
Where is Diane Bui located?
Diane Bui practices at 39765 Date St Suite 102, Murrieta, CA 92563. The listed phone number is (951) 894-4665.
What is Diane Bui's specialty?
The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.
Is Diane Bui enrolled in Medicare?
Yes. Diane Bui is registered in the Medicare PECOS enrollment system.
Which organizations bill Medicare for Diane Bui's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Diane Bui reassigns Medicare benefits to 4 organizations: Healthcare Crossing Corporation (Murrieta, CA), Galen Inpatient Physicians Inc (Murrieta, CA), Vituity Hospitalists PC (San Luis Obispo, CA) and Merced Hospitalist Medical Group, Inc. (Merced, CA). Each 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 Diane 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 Diane Bui was last updated on November 4, 2011. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 14 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. Diane T Bui, D.O. · NPI 1700077245
Internal Medicine physician in Murrieta, California. Individual provider, active in the CMS NPPES registry since August 8, 2007.
## Identity
- **NPI:** 1700077245 (Entity type: Individual)
- **Enumerated:** August 8, 2007
- **Primary specialty:** Internal Medicine · taxonomy 207R00000X
- **State license:** 20A9296 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 39765 DATE ST, SUITE 102, Murrieta, CA 92563-2005
- **Phone:** (951) 894-4665 · **Fax:** (951) 894-5178
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 4 organizations under Medicare reassignment (form CMS-855R): Healthcare Crossing Corporation (NPI 1518953298, Murrieta, CA); Galen Inpatient Physicians Inc (NPI 1861767030, Murrieta, CA); Vituity Hospitalists PC (NPI 1104551639, San Luis Obispo, CA); Merced Hospitalist Medical Group, Inc. (NPI 1730431875, Merced, CA) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** November 4, 2011
- **Other identifiers:** Medicare PIN BD567Z (CA); Other 020A92960 (CA); Other 20A9296 (CA)
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Source: [NPI Profile](https://npiprofile.com/npi/1700077245) · Data from the CMS NPPES public registry.