Joan Chia-Chiu Wu, M.D.
Dermatology Physician · Los Angeles, CA
Joan Chia-Chiu Wu, M.D. is a dermatology physician with a practice address in Los Angeles, California, and NPI 1144345372, issued on Mar 20, 2007. Check the license (California A75942, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Joan Chia-Chiu Wu
- Credential
- M.D.
- Primary taxonomy
- Dermatology Physician 207N00000X
- License number
- A75942 CA
Self-reported in NPPES; status is on the state search - Practice location
- 100 Ucla Medical Plz, Los Angeles, CA 90024
- Phone
- (310) 209-1440
- Enumerated
- Mar 20, 2007
- Record last updated
- Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
- Fax
- (310) 209-0070
- Medicare enrollment
- Enrolled (PECOS I20171206002912); accepts Medicare assignment
- Medical or professional school
- University Of California, San Diego School Of Medicine, 1995
- Entity
- Type 1 · individual
8 nearest dermatology physician records → All 2,083 in California → Look up another NPI →
Also registered at 100 Ucla Medical Plz
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Nadia Chugal, DDSEndodontics1477843746
- Min Chung, D.D.S.Prosthodontics1811284342
- Heidi Clausen, N.P.Acute Care Nurse Practitioner1033141650
- Rose Eiker, DPTPhysical Therapist1841510716
- Valerie Freeman, PASurgical Physician Assistant1033355789
- Leonard Goldstein, M.D. F.A.C.P.Hepatology Physician1972534238
Verify Joan Chia-Chiu Wu in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A75942Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
74% fewer Medicare Part D claims than the average dermatology physician in 2024
207 Medicare Part D claims for 69 beneficiaries, against an average of 797 among the 12,802 providers of this specialty who prescribed in Part D.
Most prescribed
- Ketoconazole46 claims
- Triamcinolone Acetonide34 claims
- Hydrocortisone28 claims
- Mupirocin28 claims
- Fluocinonide12 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Bills Medicare through one group practice
- ON Site Dermatology OF California, PCPlacerville, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Joan Chia-Chiu Wu among 2,083 dermatology physician records in California
Joan Chia-Chiu Wu, M.D. is one of 2,083 dermatology physician records with a practice address in California. 83% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 44% of them.
- NPI issued2007 · 44% of these records are older, 45% newer
- In a Medicare fileYes · 83% of these records are
- In the CMS Doctors and Clinicians fileYes · 70% of these records are
- Graduated1995 · median 2006 among the 1,450 with a school on file
- Record last updated2007 · 58% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207N00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Dermatology Physician providers in California
There are 2,083 dermatology physician records in California.
All 2,083 in California → Every provider in Los Angeles → Dermatology Physician nationwide →
The 8 dermatology physician records with the nearest ZIP codes
- Niraj ButalaLos Angeles, CA 900241316280977
- Janet Vafaie, M.D.Los Angeles, CA 900241942465232
- Mina Amin, MDLos Angeles, CA 900251417451196
- Stephen Baccari, NPLos Angeles, CA 900251427892884
- Leopoldo Hernandez, M.D.Los Angeles, CA 900231144327008
- Kathy Langevin, M.D.Los Angeles, CA 900251427169531
- Casey Lubner, MDLos Angeles, CA 900251205331071
- Eric Meinhardt, M.D.Los Angeles, CA 900251033436654
Common questions
What is Joan Chia-Chiu Wu, M.D.'s NPI number?
Joan Chia-Chiu Wu, M.D.'s National Provider Identifier (NPI) is 1144345372, issued on Mar 20, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Joan Chia-Chiu Wu, M.D. located?
The NPPES record lists a practice address at 100 Ucla Medical Plz, Los Angeles, CA, 90024. Phone: (310) 209-1440. Providers update this record themselves, so call before visiting.
How can I verify Joan Chia-Chiu Wu, M.D.'s license?
NPPES lists California license number A75942, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Joan Chia-Chiu Wu, M.D. prescribe under Medicare Part D?
In 2024, Joan Chia-Chiu Wu, M.D. had 207 Medicare Part D claims for 69 beneficiaries; the average among dermatology physician prescribers was 797. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.