James M. Chapman, DO
Emergency Medicine Physician · Lakewood, CA
James M. Chapman, DO is an emergency medicine physician with a practice address in Lakewood, California, and NPI 1689606790, issued on Jul 7, 2006. Check the license (California 20A5763, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- James M. Chapman
- Credential
- DO
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License number
- 20A5763 CA
Self-reported in NPPES; status is on the state search - Practice location
- 3700 South St, Lakewood, CA 90712
- Phone
- (562) 602-6800
- Enumerated
- Jul 7, 2006
- Record last updated
- Jan 16, 2009 (not updated in 17 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20100408000231); accepts Medicare assignment
- Entity
- Type 1 · individual
Also registered at 3700 South St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Omran Gdara, MDEmergency Medicine Physician1013658947
- Russell Gilbertson, MDAnesthesiology Physician1326077033
Verify James M. Chapman in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license 20A5763Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2.1 times the Medicare Part D claims of the average emergency medicine physician in 2024
469 Medicare Part D claims for 268 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D. 27 claims were for opioids.
Most prescribed
- Naproxen87 claims
- Cephalexin73 claims
- Ondansetron Odt72 claims
- Dicyclomine Hcl28 claims
- Hydrocodone-Acetaminophen23 claims
- Prednisone16 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.
The practice group's MIPS final score for 2023 (Medicare payment program): 94.6 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Bills Medicare through 2 group practices
- Regents OF The University OFOrange, CA
- Southern California Emergency Medical GroupSan Pedro, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Emergency Medicine Physician providers in California
There are 7,751 emergency medicine physician records in California.
Other emergency medicine physician records in California
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- Neal Aaron, D.O.Encinitas, CA1114283520
- Eric AaserudeWalnut Creek, CA1811491194
- Nader Abas, MDBarstow, CA1346288305
- Michael Abbo, MDNovato, CA1205819042
- Daniel Abbott, MDFullerton, CA1518907864
- Paul-Andre Abboud, M.D.Oakland, CA1710065503
- Mostafa Abdel-Hamid, MDStanford, CA1457918740
- Ashraf Abdel-KerimChino, CA1396961538
Common questions
What is James M. Chapman, DO's NPI number?
James M. Chapman, DO's National Provider Identifier (NPI) is 1689606790, issued on Jul 7, 2006. An NPI identifies a provider in billing; it is not a license.
Where is James M. Chapman, DO located?
The NPPES record lists a practice address at 3700 South St, Lakewood, CA, 90712. Phone: (562) 602-6800. Providers update this record themselves, so call before visiting.
How can I verify James M. Chapman, DO's license?
NPPES lists California license number 20A5763, 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 James M. Chapman, DO prescribe under Medicare Part D?
In 2024, James M. Chapman, DO had 469 Medicare Part D claims for 268 beneficiaries; the average among emergency medicine physician prescribers was 226. Part D covers Medicare prescriptions only.
What is James M. Chapman, DO's MIPS final score?
The 2023 MIPS final score is 94.6 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
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.