Leonard Y. Herman, MD
Emergency Medicine Physician · Glendora, CA
Leonard Y. Herman, MD is an emergency medicine physician with a practice address in Glendora, California, and NPI 1225076417, issued on Jun 2, 2006. Check the license (California G85589, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Leonard Y. Herman
- Credential
- MD
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License number
- G85589 CA
Self-reported in NPPES; status is on the state search - Practice location
- 250 S Grand Ave, Glendora, CA 91741
- Phone
- (626) 840-5655
- Enumerated
- Jun 2, 2006
- Record last updated
- Jun 6, 2009 (not updated in 17 years: call before relying on the address or phone)
- Fax
- (626) 287-1940
- Medicaid ID
- 00G855890 CA
- Medicare enrollment
- Enrolled (PECOS I20031107000546); accepts Medicare assignment
- Medical or professional school
- Jefferson Medical College Of Thomas Jefferson University, 1978
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 7,751 in California → Look up another NPI →
Also registered at 250 S Grand Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Michael Ronald Alcantara, RNEmergency Registered Nurse1306538905
- Mari AlmondEmergency Registered Nurse1689220493
- Josue BlancoEmergency Registered Nurse1790331486
- Martin Bohorquez, M.D.Anesthesiology Physician1073569307
- Yong Chen, M.D.Anesthesiology Physician1528247608
- Michael Deyoung, MDEmergency Medicine Physician1801822606
Verify Leonard Y. Herman in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G85589Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
31% fewer Medicare Part D claims than the average emergency medicine physician in 2024
157 Medicare Part D claims for 86 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D. 19 claims were for opioids.
Most prescribed
- Prednisone29 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 one group practice
- Pacifica Emergency Medical AssociatesEncino, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Leonard Y. Herman among 7,751 emergency medicine physician records in California
Leonard Y. Herman, 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 2006, is newer than 4% of them.
- NPI issued2006 · 4% of these records are older, 60% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 59% of these records are
- Graduated1978 · median 2011 among the 4,560 with a school on file
- Record last updated2009 · 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 Glendora → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- Eric Brown, M.D.Glendora, CA 917411619954633
- Bruce Bush, M.D.Glendora, CA 917411548202476
- Michael Deyoung, MDGlendora, CA 917411801822606
- Earl Isbell, MDGlendora, CA 917411447204839
- Michele Vargas, DOGlendora, CA 917411306873583
- Michael Bogey, M.D.Glendora, CA 917401497187801
- Alfred Cook, MDGlendora, CA 917401932166972
- Shin Liong, M.D.Rancho Cucamonga, CA 917391326150111
Common questions
What is Leonard Y. Herman, MD's NPI number?
Leonard Y. Herman, MD's National Provider Identifier (NPI) is 1225076417, issued on Jun 2, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Leonard Y. Herman, MD located?
The NPPES record lists a practice address at 250 S Grand Ave, Glendora, CA, 91741. Phone: (626) 840-5655. Providers update this record themselves, so call before visiting.
How can I verify Leonard Y. Herman, MD's license?
NPPES lists California license number G85589, 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 Leonard Y. Herman, MD prescribe under Medicare Part D?
In 2024, Leonard Y. Herman, MD had 157 Medicare Part D claims for 86 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.