Quick answers
- Which hospitals does Louis E. Herzog work at?
- Medicare's official clinician data lists Louis E. Herzog at 1 hospital: Memorial Medical Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Louis E. Herzog see patients?
- Medicare's clinician data lists 2 practice locations, including Walnut Creek, CA and Modesto, CA. Call before your visit to confirm the address.
- What is Louis E. Herzog's specialty?
- Medicare lists Nurse Practitioner as the primary specialty.
- Does Louis E. Herzog accept Medicare assignment?
- Yes. Medicare's clinician data says Louis E. Herzog accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of 2026-10-02. Ask the office to confirm before your visit.
- What is the phone number for Louis E. Herzog?
- (925) 939-3000, as listed in official Medicare / NPI Registry data.
- What is Louis E. Herzog's NPI number?
- 1356830384. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Louis E. Herzog works
Medicare's Facility Affiliation Data lists Louis E. Herzog at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Memorial Medical CenterModesto, CA · Acute Care Hospital · CCN 050557
Practice locations
Addresses where Louis E. Herzog is enrolled with Medicare (CMS data updated 2026-10-02).
- 1601 Ygnacio Valley RdWalnut Creek, CA 94598 (925) 939‑3000
- 1700 Coffee RdModesto, CA 95355 (209) 526‑4500
Group practices
Medicare enrollment lists Louis E. Herzog as a member of this group (CMS data updated 2026-10-02).
- Cep America - Psychiatry PC93 clinicians in the group
Specialties
- Nurse Practitionerprimary
Other nurse practitioners in Walnut Creek
Clinicians with the same Medicare primary specialty in Walnut Creek, CA — not a recommendation.
Clinician information
| Credential | NP |
|---|---|
| Graduation year | 2018 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1356830384 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated 2026-10-02, retrieved 2026-10-29
- National Downloadable File (Doctors and Clinicians) — CMS, data updated 2026-10-02, retrieved 2026-10-29
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians