John Muir Health
Organization Active NPI General Acute Care Hospital · Walnut Creek, CA
NPI 1740215219 · NPPES record last updated Aug 28, 2026
Key facts
- NPI
- 1740215219
- Entity type
- Organization (NPI type 2)
- Primary specialty
- General Acute Care Hospital 282N00000X
- License
- 140000265 (CA)
- Legal business name
- JOHN MUIR HEALTH
- Practice address
- 1601 Ygnacio Valley Rd
Walnut Creek, CA 94598-3122 - Phone
- (925) 939-3000
- Fax
- (925) 947-3265
- NPI assigned
- Jul 12, 2006
- Organization subpart
- No
Authorized official
- Name
- Mike Thomas
- Title
- President and Ceo
- Phone
- (925) 941-2100
Owners & managing parties with NPI records 8
-
Ravinder S Hundal, M.D.
-
Mark Peter Musco, M.D.
-
Vivian Wing, M.D.
Owned or controlled facilities with NPI records 2
Other NPIs with the same Medicare PAC ID 2
Related certifications (CCN) 1
Facilities with the same owner 2
Affiliated clinicians 1,173
-
Hangama Abassi, N.P.
-
Shoko Emily Abe, M.D.
-
Lauren Ables, D.O.
-
Hazel Mae Artap Abraham, M.D.
-
Nagui Achamallah, M.D.
-
Johnson O Adeyanju, M.D.
-
Pacita R Aducayen, M.D.
-
Andrea Agcaoili, D.O.
-
Piyush Aggarwal, MD
-
Sonal Aggarwal, MD
-
Atul Agrawal, MD
-
Jorge Aguilar, M.D.
-
Sam S Ahn, M.D.
-
Omar Al-Shuwaykh, M.D
-
Ravi Alagappan, MD
-
Viviane D Alfandary, M.D.
-
Mir E Ali, M.D.
-
Sarvenaz Alibeigi, M.D.
-
Russell T. Alpert, M.D.
Medicare Care Compare: Hospital
- Listed as
- John Muir Medical Center - Walnut Creek Campus
- Overall star rating
- ★★☆☆☆ 2 of 5
- Type
- Acute Care Hospitals
- Ownership
- Voluntary non-profit - Other
- Medicare certification status
- Active
- Emergency services
- Yes
Medicare participation
- Medicare fee-for-service enrollment
- Enrolled in CA
Hospital certification: CCN 050180
- Legal name
- JOHN MUIR HEALTH
- Doing business as
- JOHN MUIR MEDICAL CENTER - WALNUT CREEK CAMPUS
- Certification status
- Active
- Provider type (POS)
- Hospital – Short-term
- Participating since
- Jul 1, 1966
- Last certification
- Sep 22, 2008
- Beds
- 296
- Ownership / control type
- Other
- Organization structure
- Corporation · Non-profit
- Incorporated
- Feb 28, 1958 in CA
- Enrollment address
- 1601 Ygnacio Valley Rd
Walnut Creek, CA 94598-3122 - Hospital subgroups
- Acute care, Rehabilitation unit, Other
All disclosed owners & managing parties 22
| Name | Role | Since | Share |
|---|---|---|---|
| Jane Willemsen |
W-2 Managing Employee |
Jul 1, 2006 | |
| Vivian Wing |
Corporate Officer |
Feb 26, 2024 | |
| Jack Thompson |
Corporate Officer | Jan 1, 2019 | |
| John K Merson |
Corporate Officer | Jan 1, 2018 | |
| Claudia Matthews |
W-2 Managing Employee |
May 9, 2022 | |
| Ted Wang |
Corporate Officer |
Jan 6, 2025 | |
| John Muir Health |
5% Or Greater Direct Ownership Interest | Nov 26, 2007 | |
| Operational/Managerial Control | Nov 26, 2007 | ||
| Kathleen Villanueva |
W-2 Managing Employee |
May 9, 2023 | |
| Fatima Angeles |
Corporate Officer |
Feb 26, 2024 | |
| Johannes Peters |
Corporate Officer | Jan 1, 2018 | |
| Tracy Porter |
Corporate Officer |
Jan 1, 2025 | |
| Kathleen Odne |
Corporate Officer |
Jan 1, 2015 | |
| Peter Wilson |
Corporate Officer |
Feb 26, 2024 | |
| Mark P Musco |
Corporate Director |
Sep 1, 2013 | |
| Roger Bailey |
Corporate Director |
Jan 1, 2019 | |
| Ravinder S. Hundal |
Corporate Director |
Sep 1, 2013 | |
| Anne Grodin |
Corporate Officer | Jan 1, 2018 | |
| Michael Thomas |
Corporate Officer |
Oct 1, 2022 | |
| John Pancoast Harris |
Corporate Officer | Jan 1, 2018 | |
| Chinnavuth de Monteiro |
Corporate Officer |
Feb 26, 2024 | |
| Laura Gallagher |
Corporate Officer |
Feb 26, 2024 | |
| John Sayres |
Corporate Officer |
Jan 1, 2018 |
All facility ownership & control disclosures 2
| Facility | Type | Role | Since |
|---|---|---|---|
| San Ramon Regional Medical Center |
Hospital | 5% Or Greater Direct Ownership Interest (49%) | May 15, 2013 |
| John Muir Behavioral Health Center |
Hospital | 5% Or Greater Direct Ownership Interest | Jun 4, 1991 |
Medicare enrollment records
| Enrollment ID | State | Provider type | PAC ID | Details |
|---|---|---|---|---|
| O20071211000228 | CA | Part a Provider - Hospital | 2264338409 | Practice locations: Pleasant Hill, CA; Walnut Creek, CA; San Ramon, CA; Brentwood, CA |
National Provider Directory
Specialties & licenses
| Specialty (taxonomy) | Code | License | State | Primary |
|---|---|---|---|---|
| General Acute Care Hospital | 282N00000X | 140000265 | CA | Yes |
Addresses
Primary practice location
1601 Ygnacio Valley Rd
Walnut Creek, CA 94598-3122
Mailing address
1400 Treat Blvd
Walnut Creek, CA 94597-2142
Phone (925) 939-3000
Other identifiers
| Identifier | Type | State | Issuer |
|---|---|---|---|
| 050180A | Other | CA | BX OF CALIFORNIA |
| ZZZA0703Z | Other | CA | BLUE SHIELD OF CALIFORNIA |
| HSP40180F | Medicaid | CA | |
| ZZR00180F | Medicaid | CA |
Other names
- John Muir Health, Walnut Creek Medical Center
Other providers in Walnut Creek, CA
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- John Muir Magnetic Imaging Center
- John Muir Perinatal Medical Group
- John Muir Physician Network
- John Muir Trauma Physician Medical Group
All providers in Walnut Creek, CA · General Acute Care Hospital in California
Sources for this page
- NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Record last updated by the provider on Aug 28, 2026. Information in NPPES is self-reported and not verified by CMS.
- NUCC Health Care Provider Taxonomy: specialty names.
- Medicare Fee-For-Service Public Provider Enrollment (CMS/PECOS): enrollments, PAC IDs and benefit reassignments.
- CMS facility enrollments, All Owners and change-of-ownership files: CCNs, owners and managing parties.
- Provider of Services files (CMS): certification status, beds and related CCNs.
- Medicare Care Compare provider data (CMS): clinician profile, group practices, facility affiliations, MIPS scores and star ratings.
- National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.