Lee Brett Eisan, MD
Internal Medicine Physician · Danville, CA
Lee Brett Eisan, MD is an internal medicine physician with a practice address in Danville, California, and NPI 1871674333, issued on Oct 18, 2006. Check the license (California 00G37664, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Lee Brett Eisan
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 00G37664 CA
Self-reported in NPPES; status is on the state search - Practice location
- 907 San Ramon Valley Blvd, Danville, CA 94526
- Phone
- (925) 837-7409
- Enumerated
- Oct 18, 2006
- Record last updated
- Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
- Fax
- (925) 837-5821
- Medicare enrollment
- Enrolled (PECOS I20110304000222); may accept Medicare assignment
- Medical or professional school
- Irvine California College Of Medicine, 1977
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Also registered at 907 San Ramon Valley Blvd
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Lee Brett Eisan in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license 00G37664Check 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
920 Medicare Part D claims for 47 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D.
Most prescribed
- Atorvastatin Calcium73 claims
- Losartan Potassium41 claims
- Metoprolol Succinate34 claims
- Trazodone Hcl34 claims
- Ezetimibe33 claims
- Metformin Hcl31 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.
Lee Brett Eisan among 17,696 internal medicine physician records in California
Lee Brett Eisan, MD 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 fileYes · 63% of these records are
- Graduated1977 · median 2004 among the 11,065 with a school on file
- 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).
20 internal medicine physician records list a practice address in Danville
They are 20 of the 897 NPPES records with a practice address in Danville, and 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in Danville → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Sonal Advani, MDDanville, CA 945261861681447
- Chelsea Bowman, M.D.Danville, CA 945261033485958
- Margo Estrin, M.D.Danville, CA 945261891840096
- Philip FischbacherDanville, CA 945261467802264
- Denise Hilliard, M.D.Danville, CA 945261053375188
- Lisa Hudson, M.D.Danville, CA 945261760427702
- Jacqueline Jayan, M.D.Danville, CA 945261780001792
- Neil Okamura, D.O.Danville, CA 945261437261781
Common questions
What is Lee Brett Eisan, MD's NPI number?
Lee Brett Eisan, MD's National Provider Identifier (NPI) is 1871674333, issued on Oct 18, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Lee Brett Eisan, MD located?
The NPPES record lists a practice address at 907 San Ramon Valley Blvd, Danville, CA, 94526. Phone: (925) 837-7409. Providers update this record themselves, so call before visiting.
How can I verify Lee Brett Eisan, MD's license?
NPPES lists California license number 00G37664, 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 Lee Brett Eisan, MD prescribe under Medicare Part D?
In 2024, Lee Brett Eisan, MD had 920 Medicare Part D claims for 47 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.