Karthikeyan Muthuswamy, MD
Emergency Medicine Physician · Los Angeles, CA
Karthikeyan Muthuswamy, MD is an emergency medicine physician with a practice address in Los Angeles, California, and NPI 1518376151, issued on Aug 7, 2014. Check the license (California C204828, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Karthikeyan Muthuswamy
- Credential
- MD
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License number
- C204828 CA
Self-reported in NPPES; status is on the state search - Practice location
- 757 Westwood Plz Ste 1517, Los Angeles, CA 90095
- Phone
- (310) 825-2111
- Enumerated
- Aug 7, 2014
- Record last updated
- Jan 2, 2026
- Fax
- (310) 794-0599
- Medicare enrollment
- Enrolled (PECOS I20241028003250); accepts Medicare assignment
- Medical or professional school
- Perelman School Of Med At The University Of Pennsylvania, 2014
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 7,751 in California → Look up another NPI →
Also registered at 757 Westwood Plz Ste 1517
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Daniela AlarconEmergency Medicine Physician1528647294
- Derek AltemaEmergency Medicine Physician1023663671
- Bianca Choe, D.O.Emergency Medicine Physician1558758342
Verify Karthikeyan Muthuswamy in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license C204828Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
45% fewer Medicare Part D claims than the average emergency medicine physician in 2024
124 Medicare Part D claims for 98 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D. 11 claims were for opioids.
Most prescribed
- Prednisone13 claims
- Cephalexin12 claims
- Cyclobenzaprine Hcl12 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.
Bills Medicare through one group practice
- Emergency Medicine Services OF TX, PLLCBrownsville, TX
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Karthikeyan Muthuswamy among 7,751 emergency medicine physician records in California
Karthikeyan Muthuswamy, 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 2014, is newer than 69% of them.
- NPI issued2014 · 69% of these records are older, 28% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 59% of these records are
- Graduated2014 · median 2011 among the 4,560 with a school on file
- Record last updated2026 · 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).
Emergency Medicine Physician providers in California
There are 7,751 emergency medicine physician records in California.
All 7,751 in California → Every provider in Los Angeles → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- Rebecca Bavolek, MDLos Angeles, CA 900951942407556
- Robert Casey, MDLos Angeles, CA 900951790904597
- Priscilla Hanudel, M.D.Los Angeles, CA 900951902068505
- Gregory Hendey, MDLos Angeles, CA 900951942317391
- Aliasgher Hussain, M.D.Los Angeles, CA 900951699986810
- Amy Peng, M.D.Los Angeles, CA 900951578546479
- Jason Prystowsky, MDLos Angeles, CA 900951669407391
- Robert Rodriguez, MDLos Angeles, CA 900951194769091
Common questions
What is Karthikeyan Muthuswamy, MD's NPI number?
Karthikeyan Muthuswamy, MD's National Provider Identifier (NPI) is 1518376151, issued on Aug 7, 2014. An NPI identifies a provider in billing; it is not a license.
Where is Karthikeyan Muthuswamy, MD located?
The NPPES record lists a practice address at 757 Westwood Plz Ste 1517, Los Angeles, CA, 90095. Phone: (310) 825-2111. Providers update this record themselves, so call before visiting.
How can I verify Karthikeyan Muthuswamy, MD's license?
NPPES lists California license number C204828, 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 Karthikeyan Muthuswamy, MD prescribe under Medicare Part D?
In 2024, Karthikeyan Muthuswamy, MD had 124 Medicare Part D claims for 98 beneficiaries; the average among emergency medicine physician prescribers was 226. 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.