Quick answers
- Which hospitals does Allyssa L. Castillo work at?
- Medicare's official clinician data lists Allyssa L. Castillo at 1 hospital: CHRISTUS Santa Rosa Hospital-San Marcos. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Allyssa L. Castillo see patients?
- Medicare's clinician data lists 1 practice location in New Braunfels, TX. Call before your visit to confirm the address.
- What is Allyssa L. Castillo's specialty?
- Medicare lists Nurse Practitioner as the primary specialty.
- Does Allyssa L. Castillo accept Medicare assignment?
- Yes. Medicare's clinician data says Allyssa L. 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.
- Does Allyssa L. Castillo offer telehealth?
- Medicare's clinician data says Allyssa L. Castillo offers telehealth services. Ask the office which visits can be done by video or phone.
- What is the phone number for Allyssa L. Castillo?
- (830) 359-5859, as listed in official Medicare / NPI Registry data.
- What is Allyssa L. Castillo's NPI number?
- 1780454561. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Allyssa L. Castillo works
Medicare's Facility Affiliation Data lists Allyssa L. Castillo at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- CHRISTUS Santa Rosa Hospital-San MarcosSan Marcos, TX · Acute Care Hospital · CCN 450272
Practice locations
Addresses where Allyssa L. Castillo is enrolled with Medicare (CMS data updated 2026-10-02).
- 598 N Union Ave, Suite 250New Braunfels, TX 78130 (830) 359‑5859
Group practices
Medicare enrollment lists Allyssa L. Castillo as a member of this group (CMS data updated 2026-10-02).
- Hill Country Transitional Care Medicine2 clinicians in the group
Specialties
- Nurse Practitionerprimary
Other nurse practitioners in New Braunfels
Clinicians with the same Medicare primary specialty in New Braunfels, TX — not a recommendation.
Clinician information
| Credential | NP |
|---|---|
| Graduation year | 2023 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1780454561 |
| 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