So Lawrence Onishi, MD
Emergency Medicine Physician · San Diego, CA
So Lawrence Onishi, MD is an emergency medicine physician with a practice address in San Diego, California, and NPI 1699192575, issued on Mar 27, 2014. Check the license (California A138611, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- So Lawrence Onishi
- Credential
- MD
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License number
- A138611 CA
Self-reported in NPPES; status is on the state search - Practice location
- 4647 Zion Ave, San Diego, CA 92120
- Phone
- (619) 455-0979
- Enumerated
- Mar 27, 2014
- Record last updated
- Mar 13, 2024
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 7,751 in California → Look up another NPI →
Also registered at 4647 Zion Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Patricia Achilly, CNMAdvanced Practice Midwife1932257847
- Linda Adams, PAPhysician Assistant1427174689
- Mette-Margrethe Adkisson, M.D.Emergency Medicine Physician1528288081
Verify So Lawrence Onishi in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A138611Check 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
290 Medicare Part D claims for 192 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D. 33 claims were for opioids.
Most prescribed
- Cephalexin25 claims
- Cefpodoxime Proxetil22 claims
- Amoxicillin-Clavulanate Potass19 claims
- Hydrocodone-Acetaminophen18 claims
- Sulfamethoxazole-Trimethoprim14 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.
Industry payments in 2024: $37.32
1 payment: food and beverage; the largest payer was Baxter Healthcare. The 12,335 providers of this specialty with any payment received $953.79 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
So Lawrence Onishi among 7,751 emergency medicine physician records in California
So Lawrence Onishi, 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 fileNo · 59% of these records are
- Record last updated2024 · 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 San Diego → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- Peter Berkman, M.D.San Diego, CA 921201851305478
- Kathy Cooper, D.O.San Diego, CA 921201891802716
- William Durkin, M.D.San Diego, CA 921201174514582
- James Foster, M.D.San Diego, CA 921201699781955
- David Frant, MDSan Diego, CA 921201174690028
- Steven Kohler, MDSan Diego, CA 921201942377858
- James Larson, M.D.San Diego, CA 921201972519189
- Minh Le, MDSan Diego, CA 921201609829142
Common questions
What is So Lawrence Onishi, MD's NPI number?
So Lawrence Onishi, MD's National Provider Identifier (NPI) is 1699192575, issued on Mar 27, 2014. An NPI identifies a provider in billing; it is not a license.
Where is So Lawrence Onishi, MD located?
The NPPES record lists a practice address at 4647 Zion Ave, San Diego, CA, 92120. Phone: (619) 455-0979. Providers update this record themselves, so call before visiting.
How can I verify So Lawrence Onishi, MD's license?
NPPES lists California license number A138611, 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 So Lawrence Onishi, MD prescribe under Medicare Part D?
In 2024, So Lawrence Onishi, MD had 290 Medicare Part D claims for 192 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.