Dr. Brian A. Leish, MD
- Medicare services, 2024
- 567
- Medicare patients, 2024
- 229
- Part D claims, 2024
- 7,813
- Hospital affiliations
- 2
- Industry payments
- $5,364
- Practice address
- 24221 Calle De Louisa, Laguna Hills, CA 92653
- Practice phone
- Call (949) 465-8155
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Saddleback Medical Group Inc
Laguna Hills, California
Find Dr. Leish's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. Brian A. Leish is a family medicine physician in Laguna Hills, California
Dr. Leish practices at Saddleback Medical Group Inc in Laguna Hills, California.
Dr. Leish's NPI, 1417087073, was assigned on March 6, 2007. Dr. Leish graduated from David Geffen School of Medicine at UCLA in 1985. Dr. Leish holds California license G58832.
- NPI
- 1417087073NPI Registry (opens in a new tab)
- Medicare PAC ID
- 9335106632
- NPI enumeration date
- March 6, 2007
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (949) 465-8155
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 67
- Medical school graduation
- 1985
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Brian A. Leish practices at Saddleback Medical Group Inc in Laguna Hills, California
Dr. Leish's primary practice is Saddleback Medical Group Inc, at 24221 Calle De Louisa, Laguna Hills, CA 92653 in Orange County. The practice phone is (949) 465-8155.
- Saddleback Medical Group Inc24221 Calle De Louisa, Laguna Hills, CA 92653 · Orange CountyPhone(949) 465-8155
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Brian A. Leish is affiliated with 7 sites of care and 2 medical groups
Dr. Leish's primary practice is Saddleback Medical Group Inc in Laguna Hills, California. Dr. Leish is also affiliated with MemorialCare Saddleback Medical Center. The medical group on file is Optum - Downtown Los Angeles. Dmand AI also links Dr. Leish to 1 more hospital, 2 group practices and clinics, 2 home health agencies and 1 medical group, each named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Brian A. Leish's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Leish practices, 6 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Saddleback Medical Group Inc | Available with a free account |
| +6 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
Dmand AI maps EHR vendors, IT decision makers and buying committees across each health system and 6.2K+ hospitals, with verified contacts in the same login.
Dr. Brian A. Leish is one of 15,680 family medicine physicians in California
Family medicine is Dr. Leish's primary specialty in the NPI Registry, under taxonomy code 207Q00000X. Dr. Leish is board certified in family medicine by the American Board of Family Medicine. Dr. Leish is licensed in California.
Specialties and state licenses
- Family medicine, CaliforniaPrimary
Clinical focus
Dmand AI lists acid reflux, acute kidney failure, acute sinusitis, acute skin infection, adjustment disease, aneurysm, ankle or foot injury and asthma among the conditions Dr. Leish treats.
Family medicine physicians near Dr. Leish
Counts of family medicine physicians with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Brian A. Leish billed Medicare for 567 services in 2024
CMS data shows 567 Medicare services from Dr. Leish across 7 procedure codes in 2024, for 229 Medicare patients. Medicare paid $49,706 for them. Every service was in an office.
Dr. Leish's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 4672024: 4279%
- Other services
- 2023: 1342024: 9827%
- Tests and treatments
- 2023: 602024: 4230%
- Lab and pathology
- 2023: 8732024: 0100%
- Surgery
- 2023: 1902024: 0100%
Dr. Leish compared with the California median for family medicine physicians, 2024
- Dr. Leish
- California median
- Medicare services
- 567vs 2462.3 times
- Medicare patients
- 229vs 11894% above
- Part D claims
- 6,938vs 8338.3 times
Medians across 15,349 family medicine physicians in California with Dmand AI profiles that report each measure.
Dr. Leish's most billed Medicare procedure codes, 2024
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
Need commercial claims for Dr. Leish?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Leish and other family medicine physicians in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Brian A. Leish treated 229 Medicare patients in 2024, average age 77
CMS counts 229 Medicare patients who saw Dr. Leish in 2024. The largest group is 75 to 84, with 97 patients. 70% of them have high cholesterol, and 66% have high blood pressure. 8% are also on Medicaid. Their average risk score is 1.18, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Leish's median patient age at 73, with 52% women.
Dr. Leish's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Leish's Medicare patients by sex, 2024
- Women11450%
- Men11550%
Chronic conditions among Dr. Leish's Medicare patients, 2024
- High cholesterol70%
- High blood pressure66%
- Arthritis37%
- Diabetes26%
- Ischemic heart disease24%
- Mood disorders22%
- Chronic kidney disease20%
- Depression19%
Share of Medicare patients with each condition. A patient can have several.
Dr. Leish's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 73
Patient panel by sex, all payers
- Women52%
- Men46%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Brian A. Leish wrote 7,813 Medicare Part D claims in 2024
In 2024, Dr. Leish wrote 7,813 Medicare Part D claims for 701 patients. 90% of them were for generic drugs. CMS names the drug for 6,938 of them, across 122 drugs with 11 or more claims each, at $353,757 in total drug cost. In 2023, CMS named 6,343 claims across 125 drugs.
Dr. Leish's Part D claims by kind of drug, 2024
- Generic7,033 claims90%
- Brand-name748 claims10%
- Other32 claims0%
Dr. Leish's most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Drug classes CMS tracks in Dr. Leish's Part D claims, 2024
- Opioids3%229 of 7,813 claims
- Antibiotics6%482 of 7,813 claims
- Antipsychotics, patients 65 and over0%34 of 7,813 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 6,3432024: 6,9389%
Drugs named by CMS: 122 in 2024, 125 in 2023.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
Dr. Brian A. Leish offers telehealth to Medicare patients
Dr. Leish accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Leish as offering telehealth.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Removal of skin lesions: 1 to 10 procedures (CMS shows small counts as a range)
Sources: Doctors and Clinicians National Downloadable File (CMS); and Doctors and Clinicians Utilization Data (CMS)
For MedTech and pharma teams
Filter 7.4M+ HCPs by Medicare procedures, Part D drugs and Open Payments history, then reach them with verified contacts in one login.
Dr. Brian A. Leish received $5,364 in industry payments from 2016 to 2023
CMS Open Payments shows 314 general payments to Dr. Leish from 40 drug and device companies from 2016 to 2023. Food and beverage make up the largest share, 100% of the total. AstraZeneca Pharmaceuticals LP paid the most, $739.
General payments to Dr. Leish by program year, 2016 to 2023
Companies that paid Dr. Leish the most, 2016 to 2023
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Brian A. Leish has 1 award and honors on record
Dmand AI lists 1 award for Dr. Leish, most recently CMS Stage 1 EHR in 2013.
Awards and honors for Dr. Leish
- 2013
- CMS Stage 1 EHR
Source: Dmand AI Professional Profile Data
Dr. Brian A. Leish graduated from David Geffen School of Medicine at UCLA
Dr. Leish graduated from David Geffen School of Medicine at UCLA in 1985.
- Medical school
- Board certified in family medicine
Source: Dmand AI Professional Profile Data
Dr. Brian A. Leish accepts plans from 11 insurance carriers
Dr. Leish is in network with 11 carriers, including Aetna, Elevance and United Healthcare. Medicare plans come from the most carriers, 7. Check the plan with the practice before a visit.
- Aetna
- Elevance
- United Healthcare
- Blue Cross Blue Shield of Michigan
- Blue Cross Blue Shield of Massachusetts
- Regence Health Plans
- Alliant Health Plans
- Aspirus Health Plan
- +3 more carriersWith a free account
Plan types Dr. Leish accepts, by number of carriers
- Medicare7
- PPO7
- HMO5
- POS5
- EPO4
Source: Dmand AI Insurance Network Data
Sources for Dr. Brian A. Leish's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data |
| Primary practice, affiliations and health system | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand AI Affiliation Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Doctors and Clinicians Utilization Data (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Awards and committee roles | Dmand AI Professional Profile Data |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| Insurance carriers and plan types | Dmand AI Insurance Network Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Brian A. Leish
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. Brian A. Leish's NPI number?
Dr. Brian A. Leish's NPI number is 1417087073. It was assigned on March 6, 2007, and it is active in the NPI Registry.
What kind of doctor is Dr. Brian A. Leish?
Dr. Brian A. Leish is a family medicine physician in Laguna Hills, California. The primary specialty in the NPI Registry is Family Medicine Physician (taxonomy code 207Q00000X).
Where does Dr. Brian A. Leish practice?
Dr. Leish practices at 24221 Calle De Louisa, Laguna Hills, CA 92653. Dr. Leish's primary practice is Saddleback Medical Group Inc in Laguna Hills, California. Dmand AI also links Dr. Leish to 1 hospital, 2 group practices and clinics, 2 home health agencies and 1 medical group.
What is Dr. Brian A. Leish's office phone number?
The practice phone on file for Dr. Leish is (949) 465-8155.
What is Dr. Brian A. Leish's medical license number?
Dr. Leish holds California license G58832.
Which hospitals is Dr. Brian A. Leish affiliated with?
Dr. Leish is affiliated with MemorialCare Saddleback Medical Center. Dmand AI links Dr. Leish to 1 more hospital.
What medical group is Dr. Brian A. Leish part of?
Dr. Leish is linked to Optum - Downtown Los Angeles. Dmand AI links Dr. Leish to 1 more medical group.
Does Dr. Brian A. Leish accept Medicare?
Yes. CMS data shows Dr. Leish billed Medicare for 567 services in 2024, and Dr. Leish accepts Medicare assignment.
Does Dr. Brian A. Leish offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Leish as offering telehealth services.
How many Medicare patients does Dr. Brian A. Leish see?
CMS counts 229 Medicare patients who saw Dr. Leish in 2024, with an average age of 77.
Show 7 more questionsShow fewer questions
Is Dr. Brian A. Leish board certified?
Yes. Dr. Leish is board certified in family medicine by the American Board of Family Medicine.
What services does Dr. Brian A. Leish bill to Medicare?
In 2024, Dr. Leish's most billed Medicare services were office visit, established patient (99213), office visit, established patient (99214) and medicare service (G0439).
Where did Dr. Brian A. Leish go to medical school?
Dr. Leish graduated from David Geffen School of Medicine at UCLA in 1985.
What drugs does Dr. Brian A. Leish prescribe most?
In 2024 Medicare Part D data, Dr. Leish's most prescribed drugs by claims were Atorvastatin Calcium, Amlodipine Besylate and Levothyroxine Sodium.
Has Dr. Brian A. Leish received payments from drug or device companies?
CMS Open Payments shows $5,364 in general payments to Dr. Leish from 40 companies from 2016 to 2023. The largest total came from AstraZeneca Pharmaceuticals LP.
How long has Dr. Brian A. Leish been practicing?
Dr. Leish graduated from medical school in 1985, 41 years ago.
What insurance does Dr. Brian A. Leish accept?
Dr. Leish is in network with 11 carriers, including Aetna, Elevance and United Healthcare. Medicare plans come from the most carriers, 7. Check the plan with the practice before a visit.
Selling to family medicine practices?
See family medicine physicians in California by site of care and group
Find the practices, groups and hospitals they work with, and the right people to contact at each.
- 30 days free
- Self-serve
- No credit card