William Warren Kwan, MD
Dermatology Physician · Los Angeles, CA
William Warren Kwan, MD is a dermatology physician with a practice address in Los Angeles, California, and NPI 1376504407, issued on Mar 29, 2006. Check the license (California G73605, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- William Warren Kwan
- Credential
- MD
- Primary taxonomy
- Dermatology Physician 207N00000X
- License number
- G73605 CA
Self-reported in NPPES; status is on the state search - Practice location
- 8631 W 3RD St Ste 1035, Los Angeles, CA 90048
- Phone
- (310) 659-9075
- Enumerated
- Mar 29, 2006
- Record last updated
- Jul 9, 2025
- Medicare enrollment
- Enrolled (PECOS I20050511001031); accepts Medicare assignment
- Medical or professional school
- University Of California, Geffen School Of Medicine, 1990
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest dermatology physician records → All 2,083 in California → Look up another NPI →
Also registered at 8631 W 3RD St Ste 1035
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Sarah Storniolo, NURSE PRACTITIONERFamily Nurse Practitioner1215554068
- Nathan Vengalil, M.D.Dermatology Physician1558984146
Verify William Warren Kwan in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G73605Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
98% fewer Medicare Part D claims than the average dermatology physician in 2024
13 Medicare Part D claims, against an average of 797 among the 12,802 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of 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.
The practice group's MIPS final score for 2023 (Medicare payment program): 94.5 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $1,320.25
29 payments; by number, the most common kind was food and beverage; the largest payer was Abbvie Inc. The 10,250 providers of this specialty with any payment received $8,544.61 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through 2 group practices
- Golden State Dermatology Associates, Inc.Beverly Hills, CA
- Tower Dermatology PCLos Angeles, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
William Warren Kwan among 2,083 dermatology physician records in California
William Warren Kwan, MD 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 2006, is newer than 6% of them.
- NPI issued2006 · 6% of these records are older, 56% newer
- In a Medicare fileYes · 83% of these records are
- In the CMS Doctors and Clinicians fileYes · 70% of these records are
- Graduated1990 · median 2006 among the 1,450 with a school on file
- Record last updated2025 · 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
- Samer Alaiti, MDLos Angeles, CA 900481770591802
- Erma Benitez, M.D.Los Angeles, CA 900481972635282
- William Keith, M.D. , INC.Los Angeles, CA 900481326188707
- Neal Kumar, M.D.Los Angeles, CA 900481780002519
- Robert Leibowitz, MDLos Angeles, CA 900481043244536
- Brian Mekelburg, MDLos Angeles, CA 900481548276009
- Afshin Rahimi, MDLos Angeles, CA 900481346233434
- Richard Salit, M.D.Los Angeles, CA 900481821150913
Common questions
What is William Warren Kwan, MD's NPI number?
William Warren Kwan, MD's National Provider Identifier (NPI) is 1376504407, issued on Mar 29, 2006. An NPI identifies a provider in billing; it is not a license.
Where is William Warren Kwan, MD located?
The NPPES record lists a practice address at 8631 W 3RD St Ste 1035, Los Angeles, CA, 90048. Phone: (310) 659-9075. Providers update this record themselves, so call before visiting.
How can I verify William Warren Kwan, MD's license?
NPPES lists California license number G73605, 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 William Warren Kwan, MD prescribe under Medicare Part D?
In 2024, William Warren Kwan, MD had 13 Medicare Part D claims; the average among dermatology physician prescribers was 797. Part D covers Medicare prescriptions only.
What is William Warren Kwan, MD's MIPS final score?
The 2023 MIPS final score is 94.5 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
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.