SOTHY LUN PHENG MD
NPI 1083697007
Internal Medicine in Fullerton, CA
About Sothy Lun Pheng Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
SOTHY LUN PHENG MD (NPI 1083697007) is an individual internal medicine provider in Fullerton, California, licensed in California (C132666) and active in the NPI registry since November 2005. He is enrolled in Medicare PECOS and is a graduate of University Of Connecticut School Of Medicine (2004).
NPPES Registry Identity
Specialties & Licenses
Other Identifiers 1
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
Sothy Lun Pheng 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 Reassignments
6Medicare enrollment records show Sothy Pheng reassigns Medicare billing to 6 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Fullerton, CA 92835
- Reassigned Medicare billing, California enrollment
Brea, CA 92821
- Reassigned Medicare billing, California enrollment
- 1,699 clinicians in this Medicare group
West Hollywood, CA 90048
- Reassigned Medicare billing, California enrollment
- 175 clinicians in this Medicare group
San Bernardino, CA 92404
- Reassigned Medicare billing, California enrollment
- 1,216 clinicians in this Medicare group
Apple Valley, CA 92307
- Reassigned Medicare billing, California enrollment
- 914 clinicians in this Medicare group
Apple Valley, CA 92307
- Reassigned Medicare billing, California enrollment
- 18 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 5
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 92835 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
Referred Medical Equipment & Supplies CMS DME claims 2
Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.
Other Providers at the Same Location NPPES
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 Sothy Pheng's NPI number?
The NPI number for Sothy Pheng is 1083697007. It was assigned to this individual provider in the NPPES registry on November 23, 2005.
Where is Sothy Pheng located?
Sothy Pheng practices at 2961 Oakberry Ct, Fullerton, CA 92835. The listed phone number is (978) 551-8088.
What is Sothy Pheng's specialty?
The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.
Is Sothy Pheng enrolled in Medicare?
Yes. Sothy Pheng 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 organizations bill Medicare for Sothy Pheng's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Sothy Pheng reassigns Medicare benefits to 6 organizations: Sothy L Pheng MD A Professional Corporation (Fullerton, CA), Providence Medical Foundation (Brea, CA), Kansal Inc (West Hollywood, CA), Inpatient Specialists Of California, PC (San Bernardino, CA), Hospitalist Medicine Physicians Of California, Inc (Apple Valley, CA) and 1 more organization, listed in the Medicare section above. 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 Sothy Pheng'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 Sothy Pheng was last updated on September 9, 2020. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 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.
# Sothy Lun Pheng, MD · NPI 1083697007
Internal Medicine physician in Fullerton, California. Individual provider, active in the CMS NPPES registry since November 23, 2005.
## Identity
- **NPI:** 1083697007 (Entity type: Individual)
- **Enumerated:** November 23, 2005
- **Primary specialty:** Internal Medicine · taxonomy 207R00000X
- **State license:** C132666 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 2961 OAKBERRY CT, Fullerton, CA 92835-4304
- **Phone:** (978) 551-8088
## 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:** 6 organizations under Medicare reassignment (form CMS-855R): Sothy L Pheng MD A Professional Corporation (NPI 1407495815, Fullerton, CA); Providence Medical Foundation (NPI 1871607762, Brea, CA); Kansal Inc (NPI 1043510183, West Hollywood, CA); Inpatient Specialists Of California, PC (NPI 1952792475, San Bernardino, CA); Hospitalist Medicine Physicians Of California, Inc (NPI 1184663965, Apple Valley, CA); and 1 more · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of Connecticut School Of Medicine, class of 2004
## Record status
- **NPPES last updated:** September 9, 2020
- **Other identifiers:** Medicaid 2086948 (MA)
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Source: [NPI Profile](https://npiprofile.com/npi/1083697007) · Data from the CMS NPPES public registry.