Dr William Warren Kwan, MD - Medicare Dermatology in Los Angeles, CA

Dr William Warren Kwan, MD is a medicare enrolled "Dermatology" physician in Los Angeles, California. He went to University Of California, Geffen School Of Medicine and graduated in 1990 and has 35 years of diverse experience with area of expertise as Dermatology. He is a member of the group practice Brian P Mekelburg Md A Professional Corporation and his current practice location is 8631 W 3rd St Ste 1035, Los Angeles, California. You can reach out to his office (for appointments etc.) via phone at (310) 659-9075.

Dr William Warren Kwan is licensed to practice in California (license number G73605) and he also participates in the medicare program. He accepts medicare assignments (which means he accepts the Medicare-approved amount; you will not be billed for any more than the Medicare deductible and coinsurance) and his NPI Number is 1376504407.

Contact Information

Dr William Warren Kwan, MD
8631 W 3rd St Ste 1035,
Los Angeles, CA 90048-5964
(310) 659-9075
Not Available

Map and Direction




Physician's Profile

Full NameDr William Warren Kwan
GenderMale
SpecialityDermatology
Experience35 Years
Location8631 W 3rd St Ste 1035, Los Angeles, California
Accepts Medicare AssignmentsYes. He accepts the Medicare-approved amount; you will not be billed for any more than the Medicare deductible and coinsurance.
  Medical Education and Training:
  • Dr William Warren Kwan attended and graduated from University Of California, Geffen School Of Medicine in 1990
  NPI Data:
  • NPI Number: 1376504407
  • Provider Enumeration Date: 03/29/2006
  • Last Update Date: 07/09/2025
  Medicare PECOS Information:
  • PECOS PAC ID: 7810937554
  • Enrollment ID: I20050511001031

Medical Identifiers

Medical identifiers for Dr William Warren Kwan such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1376504407NPI-NPPES

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207N00000XDermatology G73605 (California)Primary

Group Practice Association

Group Practice NameGroup PECOS PAC IDNo. of Members
Brian P Mekelburg Md A Professional Corporation26685543533

Medicare Reassignments

Some practitioners may not bill the customers directly but medicare billing happens through clinics / group practice / hospitals where the provider works. Medicare reassignment of benefits is a mechanism by which practitioners allow third parties to bill and receive payment for medicare services performed by them. Dr William Warren Kwan allows following entities to bill medicare on his behalf.
Entity NameBrian P Mekelburg Md A Professional Corporation
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1740469725
PECOS PAC ID: 2668554353
Enrollment ID: O20080204000330
Entity NameCalifornia Coastal Dermatology A Medical Corporation
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1083032262
PECOS PAC ID: 6002138591
Enrollment ID: O20141212000589

Medicare Part D Prescriber Enrollment

Any physician or other eligible professional who prescribes Part D drugs must either enroll in the Medicare program or opt out in order to prescribe drugs to their patients with Part D prescription drug benefit plans. Dr William Warren Kwan is enrolled with medicare and thus, if eligible, can prescribe medicare part D drugs to patients with medicare part D benefits.

Mailing Address and Practice Location

Mailing AddressPractice Location Address
Dr William Warren Kwan, MD
360 Post St, Ste 400,
San Francisco, CA 94108-4907

Ph: (415) 217-3880
Dr William Warren Kwan, MD
8631 W 3rd St Ste 1035,
Los Angeles, CA 90048-5964

Ph: (310) 659-9075

Reviews and Comments


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Medicare Program: Medicare is a federal government program which provides health insurance to people who are 65 or older. This program also covers certain younger people with disabilities (who receive Social Security Disability Insurance - SSDI), and people with End-Stage Renal Disease (permanent kidney failure requiring dialysis or a transplant, sometimes called ESRD.

Medicare Assignment: Assignment means that your doctor, provider, or supplier agrees (or is required by law) to accept the Medicare-approved amount as full payment for covered services. Most doctors, providers, and suppliers accept assignment, but you should always check to make sure. Participating providers have signed an agreement to accept assignment for all Medicare-covered services.

NPI Number: The National Provider Identifier (NPI) is a unique identification number for covered health care providers. The NPI must be used in lieu of legacy provider identifiers in the HIPAA standards transactions. Covered health care providers and all health plans and health care clearinghouses must use the NPIs in the administrative and financial transactions adopted under HIPAA (Health Insurance Portability and Accountability Act).

Our Data: Information on www.medicarelist.com is built using data sources published by Centers for Medicare & Medicaid Services (CMS) under Freedom of Information Act (FOIA). The information disclosed on the NPI Registry are FOIA-disclosable and are required to be disclosed under the FOIA and the eFOIA amendments to the FOIA. There is no way to 'opt out' or 'suppress' the NPPES record data for health care providers with active NPIs.