NPPES file of Aug 9, 2026

William Chin, M.D.

Rheumatology Physician · Torrance, CA

William Chin, M.D. is a rheumatology physician with a practice address in Torrance, California, and NPI 1790995769, issued on May 22, 2007. Check the license (California G18190, as entered in NPPES) on the Medical Board of California; the federal record below is the public data PlainDoctor holds for this provider.

Record from CMS NPPES, file of Aug 9, 2026 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1790995769
Name
William Chin
Credential
M.D.
Primary taxonomy
Rheumatology Physician 207RR0500X
License number
G18190 CA
Self-reported in NPPES; status is on the state search
Practice location
19191 S Vermont Ave, Torrance, CA 90502
Phone
(310) 354-4209
Enumerated
May 22, 2007
Record last updated
Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
Fax
(310) 538-0671
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). A record is not a license: verify it with the state board.
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8 nearest rheumatology physician records → All 926 in California → Look up another NPI →

Also registered at 19191 S Vermont Ave

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Anne Chen, PTPhysical Therapist1619091006
  2. Dawn Denny, RPTGeriatric Physical Therapist1982890893
  3. Grace Hoffman, OTRLOccupational Therapist1841486115
  4. Stephanie Jennison, R.N.,N.P.Adult Health Nurse Practitioner1851548564
  5. Ellen LuongFamily Nurse Practitioner1073473757
  6. Marietta Luzon-Vidad, NPFamily Nurse Practitioner1659759074

Verify William Chin in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersMedical Board of California
    Search for license G18190    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Open the California license search

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William Chin among 926 rheumatology physician records in California

William Chin, M.D. is one of 926 rheumatology physician records with a practice address in California. 81% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does not. Its NPI, issued in 2007, is newer than 45% of them.

  • NPI issued2007 · 45% of these records are older, 42% newer
  • In a Medicare fileNo · 81% of these records are
  • In the CMS Doctors and Clinicians fileNo · 69% of these records are
  • Record last updated2007 · 62% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RR0500X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Rheumatology Physician providers in California

There are 926 rheumatology physician records in California. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.

All 926 in California → Every provider in Torrance → Rheumatology Physician nationwide →

The 8 rheumatology physician records with the nearest ZIP codes

  1. Viet Bui, MD, PHDTorrance, CA 905021396092227
  2. Dilrukshie Cooray, M.D.Torrance, CA 905021366548646
  3. George Karpouzas, M.D.Torrance, CA 905021154384303
  4. Michael Liebling, M.D.Torrance, CA 905021386691376
  5. Oleg Stens, MDTorrance, CA 905021932634839
  6. Morteza Azimian, M.D.Torrance, CA 905031295940229
  7. Steve Aziz, M.D.Torrance, CA 905031982966271
  8. Michael Duffin, M.D.Torrance, CA 905031578587309

Common questions

What is William Chin, M.D.'s NPI number?

William Chin, M.D.'s National Provider Identifier (NPI) is 1790995769, issued on May 22, 2007. An NPI identifies a provider in billing; it is not a license.

Where is William Chin, M.D. located?

The NPPES record lists a practice address at 19191 S Vermont Ave, Torrance, CA, 90502. Phone: (310) 354-4209. Providers update this record themselves, so call before visiting.

How can I verify William Chin, M.D.'s license?

NPPES lists California license number G18190, 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.

Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. An NPI identifies who bills; it is not a license.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

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.