Brian Leish, M.D.
Family Medicine Physician · Laguna Hills, CA
Brian Leish, M.D. is a family medicine physician with a practice address in Laguna Hills, California, and NPI 1417087073, issued on Mar 6, 2007. Check the license (California G58832, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Brian Leish
- Credential
- M.D.
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- G58832 CA
Self-reported in NPPES; status is on the state search - Practice location
- 24411 Health Center Dr, Laguna Hills, CA 92653
- Phone
- (949) 373-7799
- Enumerated
- Mar 6, 2007
- Record last updated
- Nov 22, 2025
- Fax
- (949) 334-8377
- Medicaid ID
- G58832P47 CA
- Medicare enrollment
- Enrolled (PECOS I20101019000806); accepts Medicare assignment
- Medical or professional school
- University Of California, Geffen School Of Medicine, 1985
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 17,133 in California → Look up another NPI →
Also registered at 24411 Health Center Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Melissa Alexander, CNMAdvanced Practice Midwife1972043826
- Niren Angle, M.D.Vascular Surgery Physician1720045412
- Albert Antonio, D.O.Neonatal-Perinatal Medicine Physician1689094518
- Blake Ashley, M.D.Surgery Physician1235150079
- Margaret Audell, MDObstetrics & Gynecology Physician1487602199
- Henry Bruce, M.D.Specialist1114920535
Verify Brian Leish in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G58832Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2.2 times the Medicare Part D claims of the average family medicine physician in 2024
7,813 Medicare Part D claims for 701 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. Brand-name drugs were 10% of claims. 229 claims were for opioids.
Most prescribed
- Atorvastatin Calcium460 claims
- Amlodipine Besylate376 claims
- Levothyroxine Sodium282 claims
- Simvastatin190 claims
- Lisinopril188 claims
- Gabapentin186 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
- Healthcare Partners Affiliates Medical GroupLaguna Hills, CA
- Saddleback Medical Group IncLaguna Hills, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Brian Leish among 17,133 family medicine physician records in California
Brian Leish, M.D. is one of 17,133 family 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 2007, is newer than 41% of them.
- NPI issued2007 · 41% of these records are older, 47% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 62% of these records are
- Graduated1985 · median 2005 among the 10,652 with a school on file
- Record last updated2025 · 58% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207Q00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
36 family medicine physician records list a practice address in Laguna Hills
They are 36 of the 2,069 NPPES records with a practice address in Laguna Hills, and 17,133 family medicine physician records in California.
All 17,133 in California → Every provider in Laguna Hills → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- James Connor, MDLaguna Hills, CA 926531578536553
- Bernard Elpedes, DOLaguna Hills, CA 926531831127497
- Mark Foster, M.D.Laguna Hills, CA 926531548338908
- Chee Ho, D.O.Laguna Hills, CA 926531609820083
- Judy Huynh, D.O.Laguna Hills, CA 926531316934284
- Henry Leung, D.O.Laguna Hills, CA 926531881662690
- Martin Louie, M.D.Laguna Hills, CA 926531770519621
- Lisa Majer, D.OLaguna Hills, CA 926531003990748
Common questions
What is Brian Leish, M.D.'s NPI number?
Brian Leish, M.D.'s National Provider Identifier (NPI) is 1417087073, issued on Mar 6, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Brian Leish, M.D. located?
The NPPES record lists a practice address at 24411 Health Center Dr, Laguna Hills, CA, 92653. Phone: (949) 373-7799. Providers update this record themselves, so call before visiting.
How can I verify Brian Leish, M.D.'s license?
NPPES lists California license number G58832, 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 Brian Leish, M.D. prescribe under Medicare Part D?
In 2024, Brian Leish, M.D. had 7,813 Medicare Part D claims for 701 beneficiaries; the average among family medicine physician prescribers was 3,544. 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.