NPI Portal NPI Lookup & Verification

Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum Organization subpart

John Muir Health

Rehabilitation Hospital Unit in Walnut Creek, CA · enumerated 2006 · authorized official Jane Willemsen, President and Chief Administrative.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1447269303

Verified

See something wrong? Report a correction

Registry record

Entity type Organization (Type 2)
Legal business name John Muir Health
Other name <Unavail>
Parent organization John Muir Health
Practice address 1601 Ygnacio Valley Rd, Walnut Creek, CA, 94598
Phone (925) 939-3000
Enumeration date Aug 7, 2006
Last updated in NPPES Nov 7, 2016

Taxonomy & classification

273Y00000X Rehabilitation Hospital Unit Hospital Units · License 140000265 (CA) Primary

Authorized official

Name Jane Willemsen
Title President and Chief Administrative
Phone (925) 947-5348

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.

Read the full guide → Validate an NPI →

Frequently asked questions

Who is the authorized official for John Muir Health?
NPPES lists Jane Willemsen (President and Chief Administrative) as the authorized official for this organization.
What is the NPI number for John Muir Health?
The NPI for John Muir Health is 1447269303, a Type 2 (organization) record in the CMS NPPES registry.

Providers at this address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2016-11-07.