Quick answers
- Does Marianne G. Usi accept Medicare assignment?
- Yes. Medicare's clinician data says Marianne G. Usi accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
- What is Marianne G. Usi's NPI number?
- 1104507466. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Practice locations
Addresses where Marianne G. Usi is enrolled with Medicare (CMS data updated October 2, 2026).
- 401 E Highland Ave, Suite 551San Bernardino, CA 92404 (909) 882‑9150
Group practices
Medicare enrollment lists Marianne G. Usi as a member of this group (CMS data updated October 2, 2026).
- Nephrology Associates Medical Group Inc64 clinicians in the group
Specialties
- Nurse Practitionerprimary
Other nurse practitioners in San Bernardino
Clinicians with the same Medicare primary specialty in San Bernardino, CA — not a recommendation.
Other clinicians in Nephrology Associates Medical Group Inc
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | NP |
|---|---|
| Graduation year | 2019 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1104507466 |
| 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
- National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
- 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