NPPES file of Aug 9, 2026

Louise Ej Thomson, MD

Nuclear Medicine Physician · Los Angeles, CA

Louise Ej Thomson, MD is a nuclear medicine physician with a practice address in Los Angeles, California, and NPI 1487780813, issued on Feb 27, 2007. Check the license (California A91738, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · Medicare files 2023 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1487780813
Name
Louise Ej Thomson
Credential
MD
Primary taxonomy
Nuclear Medicine Physician 207U00000X
License number
A91738 CA
Self-reported in NPPES; status is on the state search
Practice location
8700 Beverly Blvd, Los Angeles, CA 90048
Phone
(310) 423-8000
Enumerated
Feb 27, 2007
Record last updated
Mar 7, 2023
Medicaid ID
00A917380 CA
Medicare enrollment
Enrolled (PECOS I20060109000711); accepts Medicare assignment
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). Enrollment, assignment, school and telehealth: CMS Doctors and Clinicians file, Aug 2026. A record is not a license: verify it with the state board.
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Also registered at 8700 Beverly Blvd

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Jason Aaronson, MDDiagnostic Radiology Physician1023145463
  2. Afshin Afrashteh, MDHospitalist Physician1346402989
  3. Christopher Allen, MDInterventional Cardiology Physician1437970068
  4. Maziar Amini, MDInternal Medicine Physician1669121596
  5. Mose Arditi, M.D.Pediatric Infectious Diseases Physician1154308062
  6. Shahrzad Arya, MDStudent in an Organized Health Care Education/Training Program1144080250

Verify Louise Ej Thomson in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersMedical Board of California
    Search for license A91738
    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Open the California license search

PlainDoctor does not match the HHS-OIG exclusion list to individual records: most entries carry no NPI. Search the OIG exclusion list by name.

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No measured MIPS final score for 2023

CMS assigned the neutral MIPS final score of 75 without scoring Quality, Cost, Promoting Interoperability or Improvement Activities. It is an administrative threshold, so PlainDoctor does not compare it with measured clinicians.

Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).

Bills Medicare through 2 group practices

  1. Cedars-Sinai Imaging Medical Group A Professional CorporationWest Hollywood, CA
  2. Cedars-Sinai Medical Care FoundationWest Hollywood, CA

Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).

Louise Ej Thomson among 150 nuclear medicine physician records in California

Louise Ej Thomson, MD is one of 150 nuclear medicine physician records with a practice address in California. 59% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 58% of them.

  • NPI issued2007 · 58% of these records are older, 28% newer
  • In a Medicare fileYes · 59% of these records are
  • In the CMS Doctors and Clinicians fileYes · 48% of these records are
  • Graduated2001 · median 1999 among the 72 with a school on file
  • Record last updated2023 · 67% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207U00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Nuclear Medicine Physician providers in California

There are 150 nuclear medicine physician records in California.

The 8 nuclear medicine physician records with the nearest ZIP codes

  1. Rick Rieser, M.DLos Angeles, CA 900571740735737
  2. David Winsor, M.D.Los Angeles, CA 900571710092580
  3. Shahram Bonyadlou, M.D.Los Angeles, CA 900331982651915
  4. Patrick Colletti, M.D.Los Angeles, CA 900331578502639
  5. Hossein Jadvar, M.D.Los Angeles, CA 900331528009941
  6. Gholam Berenji, M.D.Los Angeles, CA 900731790809317
  7. Yuxin Li, MD, PHDLos Angeles, CA 900731467729384
  8. Mark Mandelkern, M.D.Los Angeles, CA 900731306946926

Common questions

What is Louise Ej Thomson, MD's NPI number?

Louise Ej Thomson, MD's National Provider Identifier (NPI) is 1487780813, issued on Feb 27, 2007. An NPI identifies a provider in billing; it is not a license.

Where is Louise Ej Thomson, MD located?

The NPPES record lists a practice address at 8700 Beverly Blvd, Los Angeles, CA, 90048. Phone: (310) 423-8000. Providers update this record themselves, so call before visiting.

How can I verify Louise Ej Thomson, MD's license?

NPPES lists California license number A91738, 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.

What is Louise Ej Thomson, MD's MIPS final score?

CMS assigned the neutral MIPS final score of 75 for 2023 without scoring any category, so it is not a measured result.

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.