KATHERINE WEI MD
NPI 1639707557
Radiology - Diagnostic Radiology in Downey, CA
About Katherine Wei Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
KATHERINE WEI MD (NPI 1639707557) is an individual diagnostic radiology provider in Downey, California, licensed in California (A177555) and active in the NPI registry since March 2020. She is enrolled in Medicare PECOS and is a graduate of Other (2020).
NPPES Registry Identity
Specialties & Licenses
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
Katherine Wei 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
3Medicare enrollment records show Katherine Wei reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Downey, CA 90241
- Reassigned Medicare billing, California enrollment
- 92 clinicians in this Medicare group
Whittier, CA 90602
- Reassigned Medicare billing, California enrollment
- 84 clinicians in this Medicare group
Orange, CA 92868
- Reassigned Medicare billing, California enrollment
- 202 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 90241 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 2
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
DOWNEY, CA 90241
DOWNEY, CA 90241
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 Katherine Wei's NPI number?
The NPI number for Katherine Wei is 1639707557. It was assigned to this individual provider in the NPPES registry on March 27, 2020.
Where is Katherine Wei located?
Katherine Wei practices at 11411 Brookshire Ave Ste 101, Downey, CA 90241. The listed phone number is (562) 869-9192.
What is Katherine Wei's specialty?
The primary specialty registered for this NPI is Radiology, specializing in Diagnostic Radiology, with taxonomy code 2085R0202X.
Is Katherine Wei enrolled in Medicare?
Yes. Katherine Wei 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 Katherine Wei's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Katherine Wei reassigns Medicare benefits to 3 organizations: United Medical Imaging Healthcare, Inc. (Downey, CA), Lambert Radiology Medical Group, Inc (Whittier, CA) and Uc Regents (Orange, 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 Katherine Wei'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 Katherine Wei was last updated on November 26, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 11 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.
# Katherine Wei, MD · NPI 1639707557
Diagnostic Radiology physician in Downey, California. Individual provider, active in the CMS NPPES registry since March 27, 2020.
## Identity
- **NPI:** 1639707557 (Entity type: Individual)
- **Enumerated:** March 27, 2020
- **Primary specialty:** Radiology - Diagnostic Radiology · taxonomy 2085R0202X
- **State license:** A177555 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 11411 BROOKSHIRE AVE STE 101, Downey, CA 90241-5008
- **Phone:** (562) 869-9192
## 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:** 3 organizations under Medicare reassignment (form CMS-855R): United Medical Imaging Healthcare, Inc. (NPI 1760572036, Downey, CA); Lambert Radiology Medical Group, Inc (NPI 1609826684, Whittier, CA); Uc Regents (NPI 1346298528, Orange, CA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2020
## Record status
- **NPPES last updated:** November 26, 2025
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Source: [NPI Profile](https://npiprofile.com/npi/1639707557) · Data from the CMS NPPES public registry.