Quick answers
- Where does Gregorio A. Castillo see patients?
- Medicare's clinician data lists 1 practice location in Princeton, NJ. Call before your visit to confirm the address.
- What is Gregorio A. Castillo's specialty?
- Medicare lists Psychiatry as the primary specialty.
- Does Gregorio A. Castillo accept Medicare assignment?
- Yes. Medicare's clinician data says Gregorio A. 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 Gregorio A. Castillo?
- (609) 497-3300, as listed in official Medicare / NPI Registry data.
- What is Gregorio A. Castillo's NPI number?
- 1013095306. 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 Gregorio A. Castillo is enrolled with Medicare (CMS data updated 2026-10-02).
- 905 Herrontown RdPrinceton, NJ 08540 (609) 497‑3300
Group practices
Medicare enrollment lists Gregorio A. Castillo as a member of this group (CMS data updated 2026-10-02).
- Princeton House Provider Group LLC45 clinicians in the group
Specialties
- Psychiatryprimary
Other psychiatrists in Princeton
Clinicians with the same Medicare primary specialty in Princeton, NJ — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 1991 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1013095306 |
| 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