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LEE BRETT EISAN MD
NPI 1871674333
Internal Medicine in Danville, CA

Active since October 18, 2006PECOS Enrolled
907 SAN RAMON VALLEY BLVD, SUITE # 102, DANVILLE, CA 94526(925) 837-7409(925) 837-5821 Get Directions Write a Review

NPPES record last updated: July 8, 2007. Verified against the NPPES registry weekly; last sync: October 18, 2026.

About Lee Brett Eisan Md NPPES

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

LEE BRETT EISAN MD (NPI 1871674333) is an individual internal medicine provider in Danville, California, licensed in California (00G37664) and active in the NPI registry since October 2006. He is enrolled in Medicare PECOS and is a graduate of Irvine California College Of Medicine (1977).

NPPES Registry Identity

NPI1871674333
Entity TypeIndividualMale
Primary Taxonomy207R00000X
Provider Legal NameLEE BRETT EISANCredential: MD
Location Address907 SAN RAMON VALLEY BLVD, SUITE # 102Danville, CA 94526
Mailing Address907 San Ramon Valley Blvd # 102, Suite # 102Danville, CA 94526 · (925) 837-7409 · Fax (925) 837-5821
Phone(925) 837-7409
Fax(925) 837-5821
Sole ProprietorNo
Medical School CMSIrvine California College Of MedicineGraduated 1977
Enumeration DateOctober 18, 2006
Last NPPES UpdateJuly 8, 2007
✔ NPI 1871674333 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 · 00G37664
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
Open in Google Maps ↗

Other Identifiers 2

Medicare UPINA47184
Medicare ID-Type Unspecified00G37664CA

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

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

PECOS PAC ID8325220825
PECOS Enrollment IDI20110304000222
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignment

Medicare enrollment records show Lee Eisan reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Lee Brett Eisan M.D. Inc
Same address
Internal Medicine
907 SAN RAMON VALLEY BLVD, #102
Danville, CA 94526
  • Reassigned Medicare billing, California enrollment
  • Medicare enrollment name: Lee Brett Eisan MD Inc
NPI 1891093670 (925) 837-7409

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

Areas of Expertise CMS Part B claims 5

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Prolonged office or other outpatient evaluation and management service(s) beyond the maximum required time of the primary procedure which has been selected using total time on the date of the primary service; each additional 15 minutes by the physician or G2212
This service refers to extended doctor visits where your healthcare provider spends additional time evaluating and managing your health beyond the primary procedure's required time. This includes each extra 15 minutes spent by the physician on the same day as the primary service.
514 services46 patients
Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more 99215
This service involves a follow-up appointment for existing patients, lasting between 40 to 54 minutes. During this time, your healthcare provider will assess your current health status, discuss any changes or concerns, review your treatment plan, and answer any questions you may have.
261 services49 patients
Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more 99212
This is a routine check-up for patients who have previously seen the doctor. During this 10-19 minute visit, the doctor will review your health status, discuss any concerns, and manage ongoing treatments or medications. It's a chance to ensure your health is on track.
42 services27 patients
Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214
This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.
41 services21 patients
Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213
This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.
24 services14 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 94526 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$153.83 typical visit price
range $69.00 – $202.35
Typical copayment $38.45 (range $17.25 – $50.58)
Most-billed visit code 99204
Established Patient
$119.48 typical visit price
range $23.44 – $166.46
Typical copayment $29.87 (range $5.86 – $41.61)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 8

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

DR. DENISE MARIA HILLIARD M.D.
Internal Medicine
907 SAN RAMON VALLEY BLVD, SUITE 104
DANVILLE, CA 94526
Contra Costa County (925) 837-1044
DR. SHOBANA SAMPATH VANKIPURAM MD
Family Medicine
907 SAN RAMON VALLEY BLVD, STE 104
DANVILLE, CA 94526
Contra Costa County (925) 837-1044
DR. UMA SUBRAMANIAM DESAI M.D.
Family Medicine
907 SAN RAMON VALLEY BLVD, SUITE 104
DANVILLE, CA 94526
Contra Costa County (925) 837-1044
MS. SHOHREH DOUSTANI L.AC.
Acupuncturist
907 SAN RAMON VALLEY BLVD, SUITE 104
DANVILLE, CA 94526
Contra Costa County (925) 837-8123
LAUREN WAITROVICH MFT
Marriage & Family Therapist
907 SAN RAMON VALLEY BLVD
DANVILLE, CA 94526
Contra Costa County (925) 420-0968
NEW DANVILLE MEDICAL GROUP, INC
Physician Assistant
907 SAN RAMON VALLEY BLVD, SUITE #202
DANVILLE, CA 94526
Contra Costa County (925) 837-4202
LEE BRETT EISAN M.D. INC
Internal Medicine
907 SAN RAMON VALLEY BLVD, #102
DANVILLE, CA 94526
Contra Costa County (925) 837-7409
MS. SIRINTORN R MANN PA-C
Physician Assistant
907 SAN RAMON VALLEY BLVD, STE 202
DANVILLE, CA 94526
Contra Costa County (925) 837-4202

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 Eisan's NPI number?

The NPI number for Lee Eisan is 1871674333. It was assigned to this individual provider in the NPPES registry on October 18, 2006.

Where is Lee Eisan located?

Lee Eisan practices at 907 San Ramon Valley Blvd Suite # 102, Danville, CA 94526. The listed phone number is (925) 837-7409.

What is Lee Eisan's specialty?

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

Is Lee Eisan enrolled in Medicare?

Yes. Lee Eisan is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Lee Eisan's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Lee Eisan reassigns Medicare benefits to Lee Brett Eisan M.D. Inc (Danville, CA). The 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 Lee Eisan's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for Lee Eisan was last updated on July 8, 2007. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 19 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.