Leif A. Johnson, M.D.
Emergency Medicine Physician · Alameda, CA
Leif A. Johnson, M.D. is an emergency medicine physician with a practice address in Alameda, California, and NPI 1851314611, issued on Jul 25, 2006. Check the license (California G78115, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Leif A. Johnson
- Credential
- M.D.
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License number
- G78115 CA
Self-reported in NPPES; status is on the state search - Practice location
- 2070 Clinton Ave, Alameda, CA 94501
- Phone
- (510) 523-4357
- Enumerated
- Jul 25, 2006
- Record last updated
- Aug 29, 2019 (not updated in 7 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20080516000594); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 7,751 in California → Look up another NPI →
Also registered at 2070 Clinton Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- David Belk, M.D.Internal Medicine Physician1386654366
- Lorraine Bonner, M.D.Internal Medicine Physician1033188149
- Robert Brooks, MDAnesthesiology Physician1386651750
- Garland Castaneda, MDInternal Medicine Physician1740676881
Verify Leif A. Johnson in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G78115Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
19% fewer Medicare Part D claims than the average emergency medicine physician in 2024
183 Medicare Part D claims for 130 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D.
Most prescribed
- Cephalexin28 claims
- Ibuprofen15 claims
- Albuterol Sulfate Hfa13 claims
- Sulfamethoxazole-Trimethoprim12 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 2 group practices
- Cep America - CaliforniaAntioch, CA
- Sutter Bay Medical FoundationAntioch, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Leif A. Johnson among 7,751 emergency medicine physician records in California
Leif A. 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 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
- Graduated1991 · median 2011 among the 4,560 with a school on file
- Record last updated2019 · 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 Alameda → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- Jorge Aceves, M.D.Alameda, CA 945011801321229
- Jordan Cohen, M.D.Alameda, CA 945011477575520
- Arthur Glaser, M.D.Alameda, CA 945011285745539
- Sammy Hodroge, MDAlameda, CA 945011669891503
- Joshua Kim, D.O.Alameda, CA 945011972036697
- Edward Lee, MDAlameda, CA 945011427039288
- Antonio Muto-Isolani, MDAlameda, CA 945011003836594
- Eric Otani, M.DAlameda, CA 945011417977901
Common questions
What is Leif A. Johnson, M.D.'s NPI number?
Leif A. Johnson, M.D.'s National Provider Identifier (NPI) is 1851314611, issued on Jul 25, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Leif A. Johnson, M.D. located?
The NPPES record lists a practice address at 2070 Clinton Ave, Alameda, CA, 94501. Phone: (510) 523-4357. Providers update this record themselves, so call before visiting.
How can I verify Leif A. Johnson, M.D.'s license?
NPPES lists California license number G78115, 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 Leif A. Johnson, M.D. prescribe under Medicare Part D?
In 2024, Leif A. Johnson, M.D. had 183 Medicare Part D claims for 130 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.