JOAN CHIA-CHIU WU M.D.
NPI 1144345372
Dermatology in Los Angeles, CA
About Joan Chia-chiu Wu M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
JOAN CHIA-CHIU WU M.D. (NPI 1144345372) is an individual dermatology provider in Los Angeles, California, licensed in California (A75942) and active in the NPI registry since March 2007. She is enrolled in Medicare PECOS and is a graduate of University Of California, San Diego School Of Medicine (1995).
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
Joan Chia-chiu Wu 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 Joan Wu reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
San Diego, CA 92128
- Reassigned Medicare billing, California enrollment
- 3 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 9
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 90024 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 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
LOS ANGELES, CA 90024
LOS ANGELES, CA 90024
LOS ANGELES, CA 90024
LOS ANGELES, CA 90024
LOS ANGELES, CA 90024
LOS ANGELES, CA 90024
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 Joan Wu's NPI number?
The NPI number for Joan Wu is 1144345372. It was assigned to this individual provider in the NPPES registry on March 20, 2007.
Where is Joan Wu located?
Joan Wu practices at 100 Ucla Medical Plz Suite 730, Los Angeles, CA 90024. The listed phone number is (310) 209-1440.
What is Joan Wu's specialty?
The primary specialty registered for this NPI is Dermatology with taxonomy code 207N00000X.
Is Joan Wu enrolled in Medicare?
Yes. Joan Wu 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 Joan Wu's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Joan Wu reassigns Medicare benefits to On Site Dermatology Of California PC (San Diego, 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 Joan Wu'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 Joan Wu was last updated on October 26, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 13 days 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.
# Joan Chia-Chiu Wu, M.D. · NPI 1144345372
Dermatology physician in Los Angeles, California. Individual provider, active in the CMS NPPES registry since March 20, 2007.
## Identity
- **NPI:** 1144345372 (Entity type: Individual)
- **Enumerated:** March 20, 2007
- **Primary specialty:** Dermatology · taxonomy 207N00000X
- **State license:** A75942 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 100 UCLA MEDICAL PLZ, SUITE 730, Los Angeles, CA 90024-6970
- **Phone:** (310) 209-1440 · **Fax:** (310) 209-0070
## 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:** On Site Dermatology Of California PC (NPI 1154842771, San Diego, CA), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of California, San Diego School Of Medicine, class of 1995
## Record status
- **NPPES last updated:** October 26, 2026
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Source: [NPI Profile](https://npiprofile.com/npi/1144345372) · Data from the CMS NPPES public registry.