NPPES file of Aug 9, 2026

William Chul Kim, M.D.

Specialist · Torrance, CA

William Chul Kim, M.D. is a specialist with a practice address in Torrance, California, and NPI 1144228628, issued on Jul 8, 2005. Check the license (California C39809, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · Medicare files 2024 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1144228628
Name
William Chul Kim
Credential
M.D.
Primary taxonomy
Specialist 174400000X
License number
C39809 CA
Self-reported in NPPES; status is on the state search
Practice location
4201 Torrance Blvd, Torrance, CA 90503
Phone
(310) 543-2521
Enumerated
Jul 8, 2005
Record last updated
Jul 6, 2012 (not updated in 14 years: call before relying on the address or phone)
Fax
(310) 543-4754
Medicare enrollment
Enrolled (PECOS I20050714001099); accepts Medicare assignment
Medical or professional school
University Of Iowa, Rj & L Carver College Of Medicine, 1974
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). Enrollment, assignment, school and telehealth: CMS Doctors and Clinicians file, Aug 2026. A record is not a license: verify it with the state board.
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8 nearest specialist records → All 5,749 in California → Look up another NPI →

Also registered at 4201 Torrance Blvd

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

  1. Ellyn Ashida, MDAllergy & Immunology Physician1245201516
  2. Sunny Beltran, BA, HAHearing Instrument Specialist1740670298
  3. Roy Blumenstrauch, M.D.Specialist1639175409
  4. Kenneth Bradley, MDPain Medicine Physician1558479352
  5. David Butsumyo, D.D.S.Endodontics1760496640
  6. Peter Chen, DDSGeneral Practice Dentistry1508887100

Verify William Chul Kim in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersWhich California board licenses this profession
    Search for license C39809    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
Find the California license search

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29% more Medicare Part D claims than the average specialist in 2024

1,775 Medicare Part D claims for 643 beneficiaries, against an average of 1,380 among the 8,233 providers of this specialty who prescribed in Part D. 738 claims were for opioids.

  1. William Kim1,775
  2. Specialty average1,380

Most prescribed

  1. Meloxicam430 claims
  2. Oxycodone-Acetaminophen375 claims
  3. Tramadol Hcl236 claims
  4. Famotidine225 claims
  5. Mupirocin129 claims
  6. Hydrocodone-Acetaminophen121 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.

Industry payments in 2024: $19.38

1 payment: food and beverage; the largest payer was Vertex Pharmaceuticals Incorporated. The 5,844 providers of this specialty with any payment received $4,760.79 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.

  1. William Kim$19.38
  2. Specialty average$4,760.79

Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.

Bills Medicare through one group practice

  1. William C Kim MD IncTorrance, CA

Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).

William Chul Kim among 5,749 specialist records in California

William Chul Kim, M.D. is one of 5,749 specialist records with a practice address in California. 30% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2005, is newer than 0% of them.

  • NPI issued2005 · 0% of these records are older, 93% newer
  • In a Medicare fileYes · 30% of these records are
  • In the CMS Doctors and Clinicians fileYes · 19% of these records are
  • Graduated1974 · median 1989 among the 1,075 with a school on file
  • Record last updated2012 · 77% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 174400000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Specialist providers in California

There are 5,749 specialist records in California.

All 5,749 in California → Every provider in Torrance → Specialist nationwide →

The 8 specialist records with the nearest ZIP codes

  1. Roy Blumenstrauch, M.D.Torrance, CA 905031639175409
  2. Cynthia Bryant, M.DTorrance, CA 905031902988520
  3. Herbert BurackTorrance, CA 905031407883952
  4. Raj Dugel, M.D.Torrance, CA 905031013968312
  5. Michael Friedman, M.D.Torrance, CA 905031336338458
  6. Amber Kyle, M.D.Torrance, CA 905031326123233
  7. Anthony Leung, M.D.Torrance, CA 905031528066008
  8. Ghodsi Madani, M.DTorrance, CA 905031477572477

Common questions

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

William Chul Kim, M.D.'s National Provider Identifier (NPI) is 1144228628, issued on Jul 8, 2005. An NPI identifies a provider in billing; it is not a license.

Where is William Chul Kim, M.D. located?

The NPPES record lists a practice address at 4201 Torrance Blvd, Torrance, CA, 90503. Phone: (310) 543-2521. Providers update this record themselves, so call before visiting.

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

NPPES lists California license number C39809, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.

How much does William Chul Kim, M.D. prescribe under Medicare Part D?

In 2024, William Chul Kim, M.D. had 1,775 Medicare Part D claims for 643 beneficiaries; the average among specialist prescribers was 1,380. 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.

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.