Quick answers
- Which hospitals does Megan Castillo work at?
- Medicare's official clinician data lists Megan Castillo at 4 hospitals: Houston Methodist The Woodlands Hospital, Houston Methodist Willowbrook Hospital, Huntsville Memorial Hospital and St. Luke's The Woodlands Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Megan Castillo see patients?
- Medicare's clinician data lists 2 practice locations, including Huntsville, TX and Shenandoah, TX. Call before your visit to confirm the address.
- What is Megan Castillo's specialty?
- Medicare lists Physician Assistant as the primary specialty.
- Does Megan Castillo accept Medicare assignment?
- Yes. Medicare's clinician data says Megan 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 Megan Castillo?
- (936) 321-5440, as listed in official Medicare / NPI Registry data.
- What is Megan Castillo's NPI number?
- 1447781091. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Megan Castillo works
Medicare's Facility Affiliation Data lists Megan Castillo at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Houston Methodist The Woodlands HospitalThe Woodlands, TX · Acute Care Hospital · CCN 670122
- Houston Methodist Willowbrook HospitalHouston, TX · Acute Care Hospital · CCN 450844
- Huntsville Memorial HospitalHuntsville, TX · Acute Care Hospital · CCN 450347
- St. Luke's The Woodlands HospitalThe Woodlands, TX · Acute Care Hospital · CCN 450862
Practice locations
Addresses where Megan Castillo is enrolled with Medicare (CMS data updated 2026-10-02).
- 119 Medical Park Ln, Suite CHuntsville, TX 77340 (936) 321‑5440
- 129 Vision Park Blvd, Suite 307Shenandoah, TX 77384
Group practices
Medicare enrollment lists Megan Castillo as a member of this group (CMS data updated 2026-10-02).
- Gastroenterology Partners of North Houston PLLC10 clinicians in the group
Specialties
- Physician Assistantprimary
Other physician assistants in Huntsville
Clinicians with the same Medicare primary specialty in Huntsville, TX — not a recommendation.
Clinician information
| Credential | PA |
|---|---|
| Graduation year | 2016 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1447781091 |
| 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