NPPES file of Aug 9, 2026

Warren David King, M.D.

Sports Medicine (Orthopaedic Surgery) Physician · San Mateo, CA

Warren David King, M.D. is a sports medicine (orthopaedic surgery) physician with a practice address in San Mateo, California, and NPI 1154485753, issued on Dec 20, 2006. Check the license (California G53371, as entered in NPPES) on the Medical Board of California; 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
1154485753
Name
Warren David King
Credential
M.D.
Primary taxonomy
Sports Medicine (Orthopaedic Surgery) Physician 207XX0005X
License number
G53371 CA
Self-reported in NPPES; status is on the state search
Practice location
100 S Ellsworth Ave Ste 504, San Mateo, CA 94401
Phone
(650) 380-5695
Enumerated
Dec 20, 2006
Record last updated
Mar 24, 2023
Fax
(650) 260-2170
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 sports medicine (orthopaedic surgery) physician records → All 384 in California → Look up another NPI →

Verify Warren David King in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersMedical Board of California
    Search for license G53371    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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95% fewer Medicare Part D claims than the average sports medicine (orthopaedic surgery) physician in 2024

14 Medicare Part D claims, against an average of 288 among the 2,562 providers of this specialty who prescribed in Part D.

  1. Warren King14
  2. Specialty average288

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.

Warren David King among 384 sports medicine (orthopaedic surgery) physician records in California

Warren David King, M.D. is one of 384 sports medicine (orthopaedic surgery) physician records with a practice address in California. 88% 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 7% of them.

  • NPI issued2006 · 7% of these records are older, 57% newer
  • In a Medicare fileYes · 88% of these records are
  • In the CMS Doctors and Clinicians fileNo · 76% of these records are
  • Record last updated2023 · 51% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207XX0005X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Sports Medicine (Orthopaedic Surgery) Physician providers in California

There are 384 sports medicine (orthopaedic surgery) physician records in California.

All 384 in California → Every provider in San Mateo → Sports Medicine (Orthopaedic Surgery) Physician nationwide →

The 8 sports medicine (orthopaedic surgery) physician records with the nearest ZIP codes

  1. Paul Hughes, MDSan Mateo, CA 944011851361695
  2. Geoffrey Abrams, MDStanford, CA 943051285821223
  3. Joseph Donahue, MDStanford, CA 943051518033356
  4. Joseph Donnelly, M.D.Stanford, CA 943051114979176
  5. Gary Fanton, MDStanford, CA 943051558410498
  6. Michael Freehill, M.D.Stanford, CA 943051205973898
  7. Calvin Hwang, MDStanford, CA 943051063705804
  8. Kenneth Lin, MDStanford, CA 943051417311556

Common questions

What is Warren David King, M.D.'s NPI number?

Warren David King, M.D.'s National Provider Identifier (NPI) is 1154485753, issued on Dec 20, 2006. An NPI identifies a provider in billing; it is not a license.

Where is Warren David King, M.D. located?

The NPPES record lists a practice address at 100 S Ellsworth Ave Ste 504, San Mateo, CA, 94401. Phone: (650) 380-5695. Providers update this record themselves, so call before visiting.

How can I verify Warren David King, M.D.'s license?

NPPES lists California license number G53371, 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 Warren David King, M.D. prescribe under Medicare Part D?

In 2024, Warren David King, M.D. had 14 Medicare Part D claims; the average among sports medicine (orthopaedic surgery) physician prescribers was 288. 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.