DR. ERIN MARIE GILLIS M.D.
NPI 1154453702
Emergency Medicine in Los Gatos, CA
About Dr. Erin Marie Gillis M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. ERIN MARIE GILLIS M.D. (NPI 1154453702) is an individual emergency medicine provider in Los Gatos, California, licensed in California (96811) and active in the NPI registry since March 2007. She is enrolled in Medicare PECOS, maintains a secondary practice location in Stanford, and is a graduate of University Of California, Irvine, California College Of Medicine (2005).
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Location 1
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Dr. Erin Marie Gillis M.d. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignments
3Medicare enrollment records show Erin Gillis reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
San Jose, CA 95124
- Reassigned Medicare billing, California enrollment
- 2,323 clinicians in this Medicare group
Palo Alto, CA 94301
- Reassigned Medicare billing, California enrollment
- 4,479 clinicians in this Medicare group
San Mateo, CA 94401
- Reassigned Medicare billing, California enrollment
- 45 clinicians in this Medicare group
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 6
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.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 95032 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Medicare Quality Performance CMS QPP · MIPS
Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.
Other Providers at the Same Location NPPES 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
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 Erin Gillis's NPI number?
The NPI number for Erin Gillis is 1154453702. It was assigned to this individual provider in the NPPES registry on March 9, 2007.
Where is Erin Gillis located?
Erin Gillis practices at 15400 Los Gatos Blvd, Los Gatos, CA 95032. The listed phone number is (408) 730-6200.
What is Erin Gillis's specialty?
The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.
Is Erin Gillis enrolled in Medicare?
Yes. Erin Gillis is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organizations bill Medicare for Erin Gillis's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Erin Gillis reassigns Medicare benefits to 3 organizations: Cep America - California (San Jose, CA), Sutter Bay Medical Foundation (Palo Alto, CA) and Mills Peninsula Emergency Medical Associates Inc (San Mateo, CA). Each 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 Erin Gillis'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 Erin Gillis was last updated on September 28, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 26 days 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.
# Dr. Erin Marie Gillis, M.D. · NPI 1154453702
Emergency Medicine physician in Los Gatos, California. Individual provider, active in the CMS NPPES registry since March 9, 2007.
## Identity
- **NPI:** 1154453702 (Entity type: Individual)
- **Enumerated:** March 9, 2007
- **Primary specialty:** Emergency Medicine · taxonomy 207P00000X
- **State license:** 96811 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 15400 LOS GATOS BLVD, Los Gatos, CA 95032-2502
- **Phone:** (408) 730-6200
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 3 organizations under Medicare reassignment (form CMS-855R): Cep America - California (NPI 1881632149, San Jose, CA); Sutter Bay Medical Foundation (NPI 1013950807, Palo Alto, CA); Mills Peninsula Emergency Medical Associates Inc (NPI 1548298318, San Mateo, CA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of California, Irvine, California College Of Medicine, class of 2005
## Record status
- **NPPES last updated:** September 28, 2026
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Source: [NPI Profile](https://npiprofile.com/npi/1154453702) · Data from the CMS NPPES public registry.