Dr. Leonard Lem, DDS, MD
- Part D claims, 2024
- 225
- Industry payments
- $23,122
- Affiliated sites
- 1
- State license
- 1
- Year NPI issued
- 2006
- Practice address
- 155 5th St, San Francisco, CA 94103
- Practice phone
- Call (415) 929-6560
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Pacific Oral & Maxillofacial Pathology Laboratory
San Francisco, California
Find Dr. Lem'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. Leonard Lem is an oral and maxillofacial pathology dentist in San Francisco, California
Dr. Lem practices at Pacific Oral & Maxillofacial Pathology Laboratory in San Francisco, California.
Dr. Lem's NPI, 1356357636, was assigned on July 31, 2006. Dr. Lem graduated from Uconn School Of Medicine in 1990. Dr. Lem's California license number on file is 35519.
- NPI
- 1356357636NPI Registry (opens in a new tab)
- NPI enumeration date
- July 31, 2006
- NPI status
- Active
- Practice phone
- (415) 929-6560
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Medical school graduation
- 1990
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Practice Data
Dr. Leonard Lem practices at Pacific Oral & Maxillofacial Pathology Laboratory in San Francisco, California
Dr. Lem's primary practice is Pacific Oral & Maxillofacial Pathology Laboratory, at 155 5th St, San Francisco, CA 94103 in San Francisco County. The practice phone is (415) 929-6560.
- Pacific Oral & Maxillofacial Pathology Laboratory155 5th St, San Francisco, CA 94103 · San Francisco CountyPhone(415) 929-6560
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Leonard Lem is affiliated with 2 sites of care
Dr. Lem's primary practice is Pacific Oral & Maxillofacial Pathology Laboratory in San Francisco, California. Dmand AI also links Dr. Lem to 1 physician office, 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. Leonard Lem's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Lem practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Pacific Oral & Maxillofacial Pathology Laboratory | Available with a free account |
| +1 more affiliated site | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Leonard Lem is one of 32 orals and maxillofacial pathology dentists in California
Oral and maxillofacial pathology is Dr. Lem's primary specialty in the NPI Registry, under taxonomy code 1223P0106X. Dr. Lem has a license on file in California.
Specialties and state licenses
- Oral and maxillofacial pathology dentist, CaliforniaPrimary
Orals and maxillofacial pathology dentists near Dr. Lem
Counts of orals and maxillofacial pathology dentists 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. Leonard Lem's patients have a median age of 62
Across all payers, Dmand AI patient panel data puts Dr. Lem's median patient age at 62, with 50% women.
Dr. Lem's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 62
Patient panel by sex, all payers
- Women50%
- Men50%
Source: Dmand AI Patient Panel Data
Dr. Leonard Lem wrote 225 Medicare Part D claims in 2024
In 2024, Dr. Lem wrote 225 Medicare Part D claims for 99 patients. 100% of them were for generic drugs. CMS names the drug for 204 of them, across 4 drugs with 11 or more claims each, at $658 in total drug cost.
Dr. Lem'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. Lem's Part D claims, 2024
- Antibiotics56%127 of 225 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
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
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Dr. Leonard Lem received $23,122 in industry payments from 2024 to 2025
CMS Open Payments shows 32 general payments to Dr. Lem from 6 drug and device companies from 2024 to 2025. Device or supply loans make up the largest share, 99% of the total. KLS-Martin L.P. paid the most, $22,838.
General payments to Dr. Lem by program year, 2024 to 2025
General payments to Dr. Lem by kind, 2024 to 2025
- Device or supply loans$22,83899%
- Food and beverage$2841%
Companies that paid Dr. Lem the most, 2024 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Leonard Lem graduated from Uconn School Of Medicine
Dr. Lem graduated from Uconn School Of Medicine in 1990.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Leonard Lem'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 patients and the all-payer patient panel | Dmand AI Patient Panel Data |
| 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) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile 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. Leonard Lem
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. Leonard Lem's NPI number?
Dr. Leonard Lem's NPI number is 1356357636. It was assigned on July 31, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Leonard Lem?
Dr. Leonard Lem is an oral and maxillofacial pathology dentist in San Francisco, California. The primary specialty in the NPI Registry is Oral and Maxillofacial Pathology Dentist (taxonomy code 1223P0106X).
Where does Dr. Leonard Lem practice?
Dr. Lem practices at 155 5th St, San Francisco, CA 94103. Dr. Lem's primary practice is Pacific Oral & Maxillofacial Pathology Laboratory in San Francisco, California. Dmand AI also links Dr. Lem to 1 physician office.
What is Dr. Leonard Lem's office phone number?
The practice phone on file for Dr. Lem is (415) 929-6560.
What is Dr. Leonard Lem's medical license number?
Dr. Lem's California license number on file is 35519.
Where did Dr. Leonard Lem go to medical school?
Dr. Lem graduated from Uconn School Of Medicine in 1990.
What drugs does Dr. Leonard Lem prescribe most?
In 2024 Medicare Part D data, Dr. Lem's most prescribed drugs by claims were Amoxicillin, Ibuprofen and Chlorhexidine Gluconate.
Has Dr. Leonard Lem received payments from drug or device companies?
CMS Open Payments shows $23,122 in general payments to Dr. Lem from 6 companies from 2024 to 2025. The largest total came from KLS-Martin L.P.
How long has Dr. Leonard Lem been practicing?
Dr. Lem graduated from medical school in 1990, 36 years ago.
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