Quick answers
- Where does Elena M. Castro see patients?
- Medicare's clinician data lists 2 practice locations, including Largo, MD and Gaithersburg, MD. Call before your visit to confirm the address.
- What is Elena M. Castro's specialty?
- Medicare lists Emergency Medicine as the primary specialty.
- Does Elena M. Castro accept Medicare assignment?
- Yes. Medicare's clinician data says Elena M. Castro 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 Elena M. Castro?
- (301) 618-5700, as listed in official Medicare / NPI Registry data.
- What is Elena M. Castro's NPI number?
- 1639255482. 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 Elena M. Castro is enrolled with Medicare (CMS data updated 2026-10-02).
- 1221 Mercantile LnLargo, MD 20774 (301) 618‑5700
- 655 Watkins Mill RdGaithersburg, MD 20879 (240) 632‑4000
Group practices
Medicare enrollment lists Elena M. Castro as a member of this group (CMS data updated 2026-10-02).
- Kaiser Foundation Health Plan of the Mid Atlantic States, Inc1,899 clinicians in the group
Specialties
- Emergency Medicineprimary
Other emergency medicine doctors in Largo
Clinicians with the same Medicare primary specialty in Largo, MD — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Georgetown University School Of Medicine |
| Graduation year | 2003 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1639255482 |
| 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 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