Quick answers
- Which hospitals does Oscar Castrejon work at?
- Medicare's official clinician data lists Oscar Castrejon at 3 hospitals: Los Alamos Medical Center, Memorial Medical Center and Three Crosses Regional Hospital LLC. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Oscar Castrejon see patients?
- Medicare's clinician data lists 1 practice location in Las Cruces, NM. Call before your visit to confirm the address.
- What is Oscar Castrejon's specialty?
- Medicare lists Family Practice as the primary specialty.
- Does Oscar Castrejon accept Medicare assignment?
- Yes. Medicare's clinician data says Oscar Castrejon 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 Oscar Castrejon?
- (575) 522-8641, as listed in official Medicare / NPI Registry data.
- What is Oscar Castrejon's NPI number?
- 1508020355. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Oscar Castrejon works
Medicare's Facility Affiliation Data lists Oscar Castrejon at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Los Alamos Medical CenterLos Alamos, NM · Acute Care Hospital · CCN 320033
- Memorial Medical CenterLas Cruces, NM · Acute Care Hospital · CCN 320018
- Three Crosses Regional Hospital LLCLas Cruces, NM · Acute Care Hospital · CCN 320091
Practice locations
Addresses where Oscar Castrejon is enrolled with Medicare (CMS data updated 2026-10-02).
- 2450 S Telshor BlvdLas Cruces, NM 88011 (575) 522‑8641
Group practices
Medicare enrollment lists Oscar Castrejon as a member of this group (CMS data updated 2026-10-02).
- Southwest Emergency Medical Associates of NM PC55 clinicians in the group
Specialties
- Family Practiceprimary
Other family doctors in Las Cruces
Clinicians with the same Medicare primary specialty in Las Cruces, NM — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 2005 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1508020355 |
| 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