Quick answers
- Does Alexandra R. Olague accept Medicare assignment?
- Medicare's clinician data says Alexandra R. Olague may accept Medicare assignment (as of October 2, 2026). Ask the office whether they accept it for your visit.
- What is Alexandra R. Olague's NPI number?
- 1801619515. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Alexandra R. Olague works
Medicare's Facility Affiliation Data lists Alexandra R. Olague 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
- John Muir Medical Center - Concord CampusConcord, CA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 050496
Practice locations
Addresses where Alexandra R. Olague is enrolled with Medicare (CMS data updated October 2, 2026).
- 2222 E St, Suite 340Concord, CA 94520 (925) 363‑0069
- 3291 Walnut Blvd, Suite 100Brentwood, CA 94513 (925) 363‑0069
Group practices
Medicare enrollment lists Alexandra R. Olague as a member of this group (CMS data updated October 2, 2026).
- Diablo Digestive Care Inc2 clinicians in the group
Specialties
- Physician Assistantprimary
Other physician assistants in Concord
Clinicians with the same Medicare primary specialty in Concord, CA — not a recommendation.
Other clinicians in Diablo Digestive Care Inc
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | PA |
|---|---|
| Graduation year | 2024 |
| Gender (as listed) | Female |
| Medicare assignment | May accept for some services |
| NPI (National Provider Identifier) | 1801619515 |
| 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