Peter B. Kwon, M.D.
Internal Medicine Physician · Placentia, CA
Peter B. Kwon, M.D. is an internal medicine physician with a practice address in Placentia, California, and NPI 1003840471, issued on Jul 10, 2006. Check the license (California A46220, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Peter B. Kwon
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- A46220 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1275 N Rose Dr, Placentia, CA 92870
- Phone
- (714) 961-5423
- Enumerated
- Jul 10, 2006
- Record last updated
- Mar 12, 2010 (not updated in 16 years: call before relying on the address or phone)
- Fax
- (714) 961-5374
- Entity
- Type 1 · individual
Also registered at 1275 N Rose Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Pauline Ho, M.D.Specialist1194854794
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- Kenneth Schemmer, M.D.Specialist1619066867
- Carol Schreiber, N.P.Hospice and Palliative Medicine (Obstetrics & Gynecology) Physician1548482284
Verify Peter B. Kwon in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A46220Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
91% fewer Medicare Part D claims than the average internal medicine physician in 2024
274 Medicare Part D claims for 42 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D.
Most prescribed
- Losartan Potassium22 claims
- Carvedilol14 claims
- Metformin Hcl13 claims
- Rosuvastatin Calcium13 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.
Internal Medicine Physician providers in California
There are 17,696 internal medicine physician records in California.
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Common questions
What is Peter B. Kwon, M.D.'s NPI number?
Peter B. Kwon, M.D.'s National Provider Identifier (NPI) is 1003840471, issued on Jul 10, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Peter B. Kwon, M.D. located?
The NPPES record lists a practice address at 1275 N Rose Dr, Placentia, CA, 92870. Phone: (714) 961-5423. Providers update this record themselves, so call before visiting.
How can I verify Peter B. Kwon, M.D.'s license?
NPPES lists California license number A46220, 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 Peter B. Kwon, M.D. prescribe under Medicare Part D?
In 2024, Peter B. Kwon, M.D. had 274 Medicare Part D claims for 42 beneficiaries; the average among internal medicine physician prescribers was 3,176. 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.
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.