ELIZABETH M ARIAS MD
NPI 1104836535
Hospitalist in Palo Alto, CA
About Elizabeth M Arias Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
ELIZABETH M ARIAS MD (NPI 1104836535) is an individual hospitalist provider in Palo Alto, California, licensed in California (C55357) and active in the NPI registry since August 2006. She is enrolled in Medicare PECOS and is a graduate of University Of Wisconsin School Of Medicine (2003).
NPPES Registry Identity
Specialties & Licenses 2
Other Identifiers 2
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
Elizabeth M Arias Md 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 Reassignment
Medicare enrollment records show Elizabeth Arias reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Palo Alto, CA 94301
- Reassigned Medicare billing, California enrollment
- 4,479 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 4
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 94301 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
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.
PALO ALTO, CA 94301
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 Elizabeth Arias's NPI number?
The NPI number for Elizabeth Arias is 1104836535. It was assigned to this individual provider in the NPPES registry on August 8, 2006.
Where is Elizabeth Arias located?
Elizabeth Arias practices at 795 El Camino Real, Palo Alto, CA 94301. The listed phone number is (650) 321-4121.
What is Elizabeth Arias's specialty?
The primary specialty registered for this NPI is Hospitalist with taxonomy code 208M00000X.
Is Elizabeth Arias enrolled in Medicare?
Yes. Elizabeth Arias 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 organization bills Medicare for Elizabeth Arias's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Elizabeth Arias reassigns Medicare benefits to Sutter Bay Medical Foundation (Palo Alto, 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 Elizabeth Arias'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 Elizabeth Arias was last updated on February 16, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 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.
# Elizabeth M Arias, MD · NPI 1104836535
Hospitalist physician in Palo Alto, California. Individual provider, active in the CMS NPPES registry since August 8, 2006.
## Identity
- **NPI:** 1104836535 (Entity type: Individual)
- **Enumerated:** August 8, 2006
- **Primary specialty:** Hospitalist · taxonomy 208M00000X
- **State license:** C55357 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 795 EL CAMINO REAL, Palo Alto, CA 94301-2302
- **Phone:** (650) 321-4121 · **Fax:** (650) 853-6052
## 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:** Sutter Bay Medical Foundation (NPI 1013950807, Palo Alto, CA), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of Wisconsin School Of Medicine, class of 2003
## Record status
- **NPPES last updated:** February 16, 2021
- **Other identifiers:** Other P00452338 (WA); Medicaid 8467573 (WA)
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Source: [NPI Profile](https://npiprofile.com/npi/1104836535) · Data from the CMS NPPES public registry.