Karen Chang, MD
Emergency Medicine Physician · Lynwood, CA
Karen Chang, MD is an emergency medicine physician with a practice address in Lynwood, California, and NPI 1023026242, issued on Aug 3, 2006. Check the license (California A95327, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Karen Chang
- Credential
- MD
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License number
- A95327 CA
Self-reported in NPPES; status is on the state search - Practice location
- 3630 E Imperial Hwy, Lynwood, CA 90262
- Phone
- (310) 900-4525
- Enumerated
- Aug 3, 2006
- Record last updated
- May 7, 2015 (not updated in 11 years: call before relying on the address or phone)
- Fax
- (310) 900-8287
- Medicaid ID
- 00A953270 CA
- Medicare enrollment
- Enrolled (PECOS I20070716000429); accepts Medicare assignment
- Medical or professional school
- University Of California, Geffen School Of Medicine, 2003
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 7,751 in California → Look up another NPI →
Also registered at 3630 E Imperial Hwy
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Jessica AaronsonAcute Care Nurse Practitioner1407355571
- Jannet Akouayri, PHARMDPharmacist1831737188
- Mohammed Alam, MDAnesthesiology Physician1831123124
- Khaled Albakri, MDStudent in an Organized Health Care Education/Training Program1962345553
- Doreen ArchuletaClinical Social Worker1437700796
- Muhammad ArslanStudent in an Organized Health Care Education/Training Program1396664819
Verify Karen Chang in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A95327Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
22% fewer Medicare Part D claims than the average emergency medicine physician in 2024
176 Medicare Part D claims for 108 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D. 24 claims were for opioids.
Most prescribed
- Ibuprofen33 claims
- Ondansetron Odt19 claims
- Hydrocodone-Acetaminophen16 claims
- Cephalexin11 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).
Industry payments in 2024: $34.27
1 payment: food and beverage; the largest payer was Gilead Sciences, Inc. The 12,335 providers of this specialty with any payment received $953.79 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through 2 group practices
- Cep America - CaliforniaLynwood, CA
- Mission Viejo Emergency Medical Associates, Inc.Marina Del Rey, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Karen Chang among 7,751 emergency medicine physician records in California
Karen Chang, MD is one of 7,751 emergency medicine 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. Its NPI, issued in 2006, is newer than 4% of them.
- NPI issued2006 · 4% of these records are older, 60% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 59% of these records are
- Graduated2003 · median 2011 among the 4,560 with a school on file
- Record last updated2015 · 59% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207P00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
21 emergency medicine physician records list a practice address in Lynwood
They are 21 of the 1,145 NPPES records with a practice address in Lynwood, and 7,751 emergency medicine physician records in California.
All 7,751 in California → Every provider in Lynwood → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- Maria Davis, MDLynwood, CA 902621285681122
- Monica Derbigny, MDLynwood, CA 902621649226044
- Robert Flashman, MDLynwood, CA 902621639126618
- Ryun Harper, MDLynwood, CA 902621417904400
- Stephen Higgins, MDLynwood, CA 902621487600169
- Alexander Kaplan, MDLynwood, CA 902621922055904
- Clayton Kazan, MDLynwood, CA 902621245268119
- Amy Koplovsky, MDLynwood, CA 902621578519963
Common questions
What is Karen Chang, MD's NPI number?
Karen Chang, MD's National Provider Identifier (NPI) is 1023026242, issued on Aug 3, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Karen Chang, MD located?
The NPPES record lists a practice address at 3630 E Imperial Hwy, Lynwood, CA, 90262. Phone: (310) 900-4525. Providers update this record themselves, so call before visiting.
How can I verify Karen Chang, MD's license?
NPPES lists California license number A95327, 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 Karen Chang, MD prescribe under Medicare Part D?
In 2024, Karen Chang, MD had 176 Medicare Part D claims for 108 beneficiaries; the average among emergency medicine physician prescribers was 226. Part D covers Medicare prescriptions only.
What is Karen Chang, MD'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.