Laurie Louise Johnston, M.D.
Internal Medicine Physician · San Diego, CA
Laurie Louise Johnston, M.D. is an internal medicine physician with a practice address in San Diego, California, and NPI 1457360240, issued on Aug 8, 2006. Check the license (California G062814, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Laurie Louise Johnston
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- G062814 CA
Self-reported in NPPES; status is on the state search - Practice location
- 3914 Murphy Canyon RD, San Diego, CA 92123
- Phone
- (858) 573-9902
- Enumerated
- Aug 8, 2006
- Record last updated
- Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
- Fax
- (858) 573-9906
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Also registered at 3914 Murphy Canyon RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Laurie Louise Johnston in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G062814Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
71% fewer Medicare Part D claims than the average internal medicine physician in 2024
909 Medicare Part D claims for 138 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. 22 claims were for opioids.
Most prescribed
- Levothyroxine Sodium53 claims
- Pantoprazole Sodium49 claims
- Furosemide46 claims
- Quetiapine Fumarate41 claims
- Trazodone Hcl40 claims
- Amlodipine Besylate34 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.
Laurie Louise Johnston among 17,696 internal medicine physician records in California
Laurie Louise Johnston, M.D. is one of 17,696 internal medicine physician records with a practice address in California. 79% 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 5% of them.
- NPI issued2006 · 5% of these records are older, 56% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileNo · 63% of these records are
- Record last updated2007 · 61% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
961 internal medicine physician records list a practice address in San Diego
They are 961 of the 52,937 NPPES records with a practice address in San Diego, and 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in San Diego → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
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- Asim Guha Roy, MDSan Diego, CA 921231083659528
- Elan Hekier, M.D.San Diego, CA 921231225092463
- Faiz Hussain, MDSan Diego, CA 921231962422147
- Bernard Lichtenstein, M.D.San Diego, CA 921231104878073
- Karim Mansour, M.D.San Diego, CA 921231942238878
- Lynne Milgram, M.D.San Diego, CA 921231629016316
Common questions
What is Laurie Louise Johnston, M.D.'s NPI number?
Laurie Louise Johnston, M.D.'s National Provider Identifier (NPI) is 1457360240, issued on Aug 8, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Laurie Louise Johnston, M.D. located?
The NPPES record lists a practice address at 3914 Murphy Canyon RD, San Diego, CA, 92123. Phone: (858) 573-9902. Providers update this record themselves, so call before visiting.
How can I verify Laurie Louise Johnston, M.D.'s license?
NPPES lists California license number G062814, 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 Laurie Louise Johnston, M.D. prescribe under Medicare Part D?
In 2024, Laurie Louise Johnston, M.D. had 909 Medicare Part D claims for 138 beneficiaries; the average among internal medicine physician prescribers was 3,176. 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.