NPPES file of Aug 9, 2026

Sonia Yvonne Johnson, M.D.

Emergency Medicine Physician · Los Angeles, CA

Sonia Yvonne Johnson, M.D. is an emergency medicine physician with a practice address in Los Angeles, California, and NPI 1639344302, issued on Apr 24, 2008. Check the license (California A103204, 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 2024 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1639344302
Name
Sonia Yvonne Johnson
Credential
M.D.
Primary taxonomy
Emergency Medicine Physician 207P00000X
License number
A103204 CA
Self-reported in NPPES; status is on the state search
Practice location
1200 N State St, Los Angeles, CA 90033
Phone
(760) 920-6850
Enumerated
Apr 24, 2008
Record last updated
Nov 29, 2021 (not updated in 5 years: call before relying on the address or phone)
Medicare enrollment
Enrolled (PECOS I20101006000363); accepts Medicare assignment
Medical or professional school
University Of Southern California Keck School Of Medicine, 2006
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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8 nearest emergency medicine physician records → All 7,751 in California → Look up another NPI →

Also registered at 1200 N State St

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

  1. Sadeea Abbasi, M.D., PH.D.Gastroenterology Physician1366713513
  2. Danna Abdel-Khader, MDInternal Medicine Physician1780977827
  3. Terri Leigh Abe, MDInternal Medicine Physician1881897569
  4. Mona Abedzadeh, M.A CCC-SLPSpeech-Language Pathologist1699988451
  5. Zachary AbelsonObstetrics & Gynecology Physician1689237414
  6. Laurel Aberle, MDStudent in an Organized Health Care Education/Training Program1184367484

Verify Sonia Yvonne Johnson in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersMedical Board of California
    Search for license A103204    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

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21% fewer Medicare Part D claims than the average emergency medicine physician in 2024

179 Medicare Part D claims for 119 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. 24 claims were for opioids.

  1. Sonia Johnson179
  2. Specialty average226

Most prescribed

  1. Hydrocodone-Acetaminophen21 claims
  2. Cefadroxil19 claims
  3. Ondansetron Odt18 claims
  4. Cefpodoxime Proxetil13 claims
  5. Ciprofloxacin 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

  1. Southern California Permanente Medical GroupPanorama City, CA

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

Sonia Yvonne Johnson among 7,751 emergency medicine physician records in California

Sonia Yvonne Johnson, M.D. 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 2008, is newer than 50% of them.

  • NPI issued2008 · 50% of these records are older, 46% newer
  • In a Medicare fileYes · 81% of these records are
  • In the CMS Doctors and Clinicians fileYes · 59% of these records are
  • Graduated2006 · 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).

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

  1. Deirdre Anglin, MDLos Angeles, CA 900331306932025
  2. Joseph BaltrushesLos Angeles, CA 900331629152178
  3. Aaron Bright, M.D.Los Angeles, CA 900331023054087
  4. Christopher Celentano, MDLos Angeles, CA 900331972516417
  5. Christine DinuzzoLos Angeles, CA 900331952456741
  6. Marc Eckstein, M.D.Los Angeles, CA 900331922010867
  7. Sean Henderson, M.D.Los Angeles, CA 900331205887064
  8. Helen Ho, MDLos Angeles, CA 900331447208962

Common questions

What is Sonia Yvonne Johnson, M.D.'s NPI number?

Sonia Yvonne Johnson, M.D.'s National Provider Identifier (NPI) is 1639344302, issued on Apr 24, 2008. An NPI identifies a provider in billing; it is not a license.

Where is Sonia Yvonne Johnson, M.D. located?

The NPPES record lists a practice address at 1200 N State St, Los Angeles, CA, 90033. Phone: (760) 920-6850. Providers update this record themselves, so call before visiting.

How can I verify Sonia Yvonne Johnson, M.D.'s license?

NPPES lists California license number A103204, 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 Sonia Yvonne Johnson, M.D. prescribe under Medicare Part D?

In 2024, Sonia Yvonne Johnson, M.D. had 179 Medicare Part D claims for 119 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.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

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.