SIOBHAN SARA HOPKINS MD
NPI 1679678288
Hospitalist in Palo Alto, CA
About Siobhan Sara Hopkins Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
SIOBHAN SARA HOPKINS MD (NPI 1679678288) is an individual hospitalist provider in Palo Alto, California, licensed in California (C161563) and active in the NPI registry since September 2006. She is enrolled in Medicare PECOS and maintains a secondary practice location in Seaford.
NPPES Registry Identity
Specialties & Licenses 5
Secondary Practice Location 1
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 (PECOS)
Siobhan Sara Hopkins Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignments
2Medicare enrollment records show Siobhan Hopkins reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Palo Alto, CA 94304
- Reassigned Medicare billing, California enrollment
- 3,617 clinicians in this Medicare group
Stanford, CA 94305
- Reassigned Medicare billing, California enrollment
- 4,258 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.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 94304 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.
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 Siobhan Hopkins's NPI number?
The NPI number for Siobhan Hopkins is 1679678288. It was assigned to this individual provider in the NPPES registry on September 14, 2006.
Where is Siobhan Hopkins located?
Siobhan Hopkins practices at 725 Welch Rd, Palo Alto, CA 94304. The listed phone number is (650) 497-8000.
What is Siobhan Hopkins's specialty?
The primary specialty registered for this NPI is Hospitalist with taxonomy code 208M00000X.
Is Siobhan Hopkins enrolled in Medicare?
Yes. Siobhan Hopkins is registered in the Medicare PECOS enrollment system.
Which organizations bill Medicare for Siobhan Hopkins's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Siobhan Hopkins reassigns Medicare benefits to 2 organizations: Lpch Medical Group Div Of Lucile (Palo Alto, CA) and Stanford Health Care (Stanford, 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 Siobhan Hopkins'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 Siobhan Hopkins was last updated on April 28, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 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.
# Siobhan Sara Hopkins, MD · NPI 1679678288
Hospitalist physician in Palo Alto, California. Individual provider, active in the CMS NPPES registry since September 14, 2006.
## Identity
- **NPI:** 1679678288 (Entity type: Individual)
- **Enumerated:** September 14, 2006
- **Primary specialty:** Hospitalist · taxonomy 208M00000X
- **State license:** C161563 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 725 WELCH RD, Palo Alto, CA 94304
- **Phone:** (650) 497-8000
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 2 organizations under Medicare reassignment (form CMS-855R): Lpch Medical Group Div Of Lucile (NPI 1417907940, Palo Alto, CA); Stanford Health Care (NPI 1437292927, Stanford, CA) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** April 28, 2024
- **Other identifiers:** Medicaid 873175600 (MN); Medicaid 006236600 (FL)
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Source: [NPI Profile](https://npiprofile.com/npi/1679678288) · Data from the CMS NPPES public registry.