ALLISON WEI-SUM LEUNG M.D.
NPI 1407148224
Internal Medicine in Los Angeles, CA
About Allison Wei-sum Leung M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
ALLISON WEI-SUM LEUNG M.D. (NPI 1407148224) is an individual internal medicine provider in Los Angeles, California, licensed in California (136663) and active in the NPI registry since May 2011. She is enrolled in Medicare PECOS and is a graduate of University Of Michigan Medical School (2011).
NPPES Registry Identity
Specialties & Licenses 2
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
Allison Wei-sum Leung 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 Allison Leung reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Los Angeles, CA 90095
- Reassigned Medicare billing, California enrollment
- 1,766 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 8
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 90049 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Referred Medical Equipment & Supplies CMS DME claims
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 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
LOS ANGELES, CA 90049
LOS ANGELES, CA 90049
LOS ANGELES, CA 90049
LOS ANGELES, CA 90049
LOS ANGELES, CA 90049
LOS ANGELES, CA 90049
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 Allison Leung's NPI number?
The NPI number for Allison Leung is 1407148224. It was assigned to this individual provider in the NPPES registry on May 12, 2011.
Where is Allison Leung located?
Allison Leung practices at 11980 San Vicente Blvd Suite 102, Los Angeles, CA 90049. The listed phone number is (310) 208-7777.
What is Allison Leung's specialty?
The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.
Is Allison Leung enrolled in Medicare?
Yes. Allison Leung 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 Allison Leung's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Allison Leung reassigns Medicare benefits to The Regents Of The University Of California (Los Angeles, 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 Allison Leung'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 Allison Leung was last updated on November 4, 2015. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 10 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.
# Allison Wei-Sum Leung, M.D. · NPI 1407148224
Internal Medicine physician in Los Angeles, California. Individual provider, active in the CMS NPPES registry since May 12, 2011.
## Identity
- **NPI:** 1407148224 (Entity type: Individual)
- **Enumerated:** May 12, 2011
- **Primary specialty:** Internal Medicine · taxonomy 207R00000X
- **State license:** 136663 (California)
- **Sole proprietor:** Yes
## Practice location
- **Address:** 11980 SAN VICENTE BLVD, SUITE 102, Los Angeles, CA 90049-5012
- **Phone:** (310) 208-7777
## 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:** The Regents Of The University Of California (NPI 1235107566, Los Angeles, CA), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of Michigan Medical School, class of 2011
## Record status
- **NPPES last updated:** November 4, 2015
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Source: [NPI Profile](https://npiprofile.com/npi/1407148224) · Data from the CMS NPPES public registry.