Quick answers
- Does Sandra T. Murguia-Gregory accept Medicare assignment?
- Medicare's clinician data says Sandra T. Murguia-Gregory may accept Medicare assignment (as of October 2, 2026). Ask the office whether they accept it for your visit.
- What is Sandra T. Murguia-Gregory's NPI number?
- 1518141886. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Sandra T. Murguia-Gregory works
Medicare's Facility Affiliation Data lists Sandra T. Murguia-Gregory at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.
- Contra Costa Regional Medical CenterMartinez, CA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 050276
Practice locations
Addresses where Sandra T. Murguia-Gregory is enrolled with Medicare (CMS data updated October 2, 2026).
- 331 C StMartinez, CA 94553
Specialties
- Nurse Practitionerprimary
Other nurse practitioners in Martinez
Clinicians with the same Medicare primary specialty in Martinez, CA — not a recommendation.
Clinician information
| Credential | NP |
|---|---|
| Graduation year | 2009 |
| Gender (as listed) | Female |
| Medicare assignment | May accept for some services |
| NPI (National Provider Identifier) | 1518141886 |
| 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 October 2, 2026, retrieved October 29, 2026
- Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
- 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