Quick answers
- Where does Alexander Castillo see patients?
- Medicare's clinician data lists 2 practice locations, including Henderson, NV and Las Vegas, NV. Call before your visit to confirm the address.
- What is Alexander Castillo's specialty?
- Medicare lists Internal Medicine as the primary specialty.
- Does Alexander Castillo accept Medicare assignment?
- Yes. Medicare's clinician data says Alexander Castillo 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 Alexander Castillo?
- (702) 802-5100, as listed in official Medicare / NPI Registry data.
- What is Alexander Castillo's NPI number?
- 1164059226. 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 Alexander Castillo is enrolled with Medicare (CMS data updated 2026-10-02).
- 3175 Saint Rose Pkwy, Suite 121Henderson, NV 89052 (702) 802‑5100
- 3551 E Bonanza Rd, Suite 105Las Vegas, NV 89110 (702) 645‑8555
Group practices
Medicare enrollment lists Alexander Castillo as a member of this group (CMS data updated 2026-10-02).
- Ferdowsian, Global Services PLLC8 clinicians in the group
Specialties
- Internal Medicineprimary
Other internal medicine doctors in Henderson
Clinicians with the same Medicare primary specialty in Henderson, NV — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 2020 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1164059226 |
| 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