Thomas A. Leighton, MD
Emergency Medicine Physician · Harbor City, CA
Thomas A. Leighton, MD is an emergency medicine physician with a practice address in Harbor City, California, and NPI 1720155583, issued on Nov 29, 2006. Check the license (California G64985, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Thomas A. Leighton
- Credential
- MD
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License number
- G64985 CA
Self-reported in NPPES; status is on the state search - Practice location
- 25825 Vermont Ave, Harbor City, CA 90710
- Phone
- (310) 325-5111
- Enumerated
- Nov 29, 2006
- Record last updated
- Dec 1, 2021 (not updated in 5 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20081112000314); accepts Medicare assignment
- Medical or professional school
- University Of Southern California Keck School Of Medicine, 1987
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 7,751 in California → Look up another NPI →
Also registered at 25825 Vermont Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Kamren AckermanPhysical Therapist1104412352
- Bradley Ackerson, MDPediatric Infectious Diseases Physician1255490918
- Yossef Aelony, MDPulmonary Disease Physician1619178597
- Lisa Agustines, MDObstetrics & Gynecology Physician1750452736
Verify Thomas A. Leighton in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G64985Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
28% more Medicare Part D claims than the average emergency medicine physician in 2024
289 Medicare Part D claims for 194 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D. Brand-name drugs were 9% of claims. 57 claims were for opioids.
Most prescribed
- Hydrocodone-Acetaminophen40 claims
- Ciprofloxacin Hcl27 claims
- Cephalexin22 claims
- Prednisone21 claims
- Azithromycin20 claims
- Albuterol Sulfate Hfa17 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
- Southern California Permanente Medical GroupRiverside, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Thomas A. Leighton among 7,751 emergency medicine physician records in California
Thomas A. Leighton, 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
- Graduated1987 · median 2011 among the 4,560 with a school on file
- Record last updated2021 · 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).
25 emergency medicine physician records list a practice address in Harbor City
They are 25 of the 958 NPPES records with a practice address in Harbor City, and 7,751 emergency medicine physician records in California.
All 7,751 in California → Every provider in Harbor City → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- Brant Blair, MDHarbor City, CA 907101518026111
- Russell Brutscher, MDHarbor City, CA 907101750439626
- Leelamma Chacko, MDHarbor City, CA 907101881761880
- Jennifer Donson, M.D.Harbor City, CA 907101033174784
- David Donson, MDHarbor City, CA 907101780779041
- Sasan Jahan-Parwar, MDHarbor City, CA 907101043368913
- Ilona Jung, MDHarbor City, CA 907101972670974
- John Kim, MDHarbor City, CA 907101427125640
Common questions
What is Thomas A. Leighton, MD's NPI number?
Thomas A. Leighton, MD's National Provider Identifier (NPI) is 1720155583, issued on Nov 29, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Thomas A. Leighton, MD located?
The NPPES record lists a practice address at 25825 Vermont Ave, Harbor City, CA, 90710. Phone: (310) 325-5111. Providers update this record themselves, so call before visiting.
How can I verify Thomas A. Leighton, MD's license?
NPPES lists California license number G64985, 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 Thomas A. Leighton, MD prescribe under Medicare Part D?
In 2024, Thomas A. Leighton, MD had 289 Medicare Part D claims for 194 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.