Quick answers
- Which hospitals does Maria E. Ruiz work at?
- Medicare's official clinician data lists Maria E. Ruiz at 1 hospital: George Washington Univ Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Maria E. Ruiz see patients?
- Medicare's clinician data lists 1 practice location in Washington, DC. Call before your visit to confirm the address.
- What is Maria E. Ruiz's specialty?
- Medicare lists Infectious Disease as the primary specialty, and also Internal Medicine.
- Does Maria E. Ruiz accept Medicare assignment?
- Yes. Medicare's clinician data says Maria E. Ruiz 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 Maria E. Ruiz?
- (202) 741-2600, as listed in official Medicare / NPI Registry data.
- What is Maria E. Ruiz's NPI number?
- 1811947260. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Maria E. Ruiz works
Medicare's Facility Affiliation Data lists Maria E. Ruiz at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- George Washington Univ HospitalWashington, DC · Acute Care Hospital · CCN 090001
Practice locations
Addresses where Maria E. Ruiz is enrolled with Medicare (CMS data updated 2026-10-02).
- 2150 Pennsylvania Ave NWWashington, DC 20037 (202) 741‑2600
Group practices
Medicare enrollment lists Maria E. Ruiz as a member of this group (CMS data updated 2026-10-02).
- Medical Faculty Associates, Inc672 clinicians in the group
Specialties
- Infectious Diseaseprimary
- Internal Medicinealso
Find other Infectious Disease doctors in District of Columbia →
Other infectious disease doctors in Washington
Clinicians with the same Medicare primary specialty in Washington, DC — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 1997 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1811947260 |
| 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