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LEE BRETT EISAN M.D. INC
NPI 1891093670
Internal Medicine in Danville, CA

Active since March 03, 2011
907 SAN RAMON VALLEY BLVD, #102, DANVILLE, CA 94526(925) 837-7409(925) 837-5821 Get Directions Write a Review

NPPES record last updated: March 3, 2011. Verified against the NPPES registry weekly; last sync: October 18, 2026.

About Lee Brett Eisan M.d. Inc NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

LEE BRETT EISAN M.D. INC (NPI 1891093670) is a healthcare organization registered as an internal medicine in Danville, California and active in the NPI registry since March 2011. The organization lists Lee Brett Eisan, President, as its authorized official.

NPPES Registry Identity

NPI1891093670
Entity TypeOrganization
Primary Taxonomy207R00000X
Legal Business NameLEE BRETT EISAN M.D. INC
Location Address907 SAN RAMON VALLEY BLVD, #102Danville, CA 94526-4036
Mailing Address907 San Ramon Valley Blvd, #102Danville, CA 94526-4036 · (925) 837-7409 · Fax (925) 837-5821
Phone(925) 837-7409
Fax(925) 837-5821
Organization SubpartNo
Authorized OfficialLee Brett EisanPresident · (925) 837-7409
Enumeration DateMarch 3, 2011
✔ NPI 1891093670 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
License✔ Licensed in CA · G37664
Definition
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.
907 SAN RAMON VALLEY BLVD, Danville, CA 94526
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Group Practice 1

Group TaxonomyThis provdier is a business group of one or more individual practitioners, all of who practice with the same area of specialization.193400000X SINGLE SPECIALTY GROUP

Medicare Participation & PECOS CMS

Medicare enrollment and the clinicians who bill Medicare through this organization, from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Lee Brett Eisan M.d. Inc is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Clinicians Billing Medicare Through This Organization

Medicare enrollment records show 1 clinician reassigns Medicare billing to Lee Brett Eisan M.D. Inc, which bills Medicare for the services this clinician delivers.

Clinician (1)

Lee Eisan, MD
Internal Medicine
NPI 1871674333
907 SAN RAMON VALLEY BLVD SUITE # 102
Danville, CA 94526
(925) 837-7409
✔ PECOSSame address

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Lee Brett Eisan M.D. Inc's NPI number?

The NPI number for Lee Brett Eisan M.D. Inc is 1891093670. It was assigned to this organization in the NPPES registry on March 3, 2011.

Where is Lee Brett Eisan M.D. Inc located?

Lee Brett Eisan M.D. Inc is located at 907 San Ramon Valley Blvd #102, Danville, CA 94526. The listed phone number is (925) 837-7409.

What is Lee Brett Eisan M.D. Inc's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

Is Lee Brett Eisan M.D. Inc enrolled in Medicare?

Yes. Lee Brett Eisan M.D. Inc is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through Lee Brett Eisan M.D. Inc?

According to the CMS Revalidation Reassignment List (October 2026 release), 1 clinician (Internal Medicine) reassigns their Medicare billing to Lee Brett Eisan M.D. Inc. A reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for the clinician's services. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

When was this NPI record last updated?

The NPPES record for Lee Brett Eisan M.D. Inc was last updated on March 3, 2011. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 15 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.