Quick answers
- Where does Caitlyn O'Brien see patients?
- Medicare's clinician data lists 2 practice locations, including Staten Island, NY and Rockville Centre, NY. Call before your visit to confirm the address.
- What is Caitlyn O'Brien's specialty?
- Medicare lists Physician Assistant as the primary specialty.
- Does Caitlyn O'Brien accept Medicare assignment?
- Yes. Medicare's clinician data says Caitlyn O'Brien 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 Caitlyn O'Brien?
- (718) 448-3210, as listed in official Medicare / NPI Registry data.
- What is Caitlyn O'Brien's NPI number?
- 1194515882. 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 Caitlyn O'Brien is enrolled with Medicare (CMS data updated 2026-10-02).
- 1099 Targee StStaten Island, NY 10304 (718) 448‑3210
- 36 Lincoln AveRockville Centre, NY 11570 (516) 536‑2800
Group practices
Medicare enrollment lists Caitlyn O'Brien as a member of this group (CMS data updated 2026-10-02).
- True North Medical Group PC188 clinicians in the group
Specialties
- Physician Assistantprimary
Other physician assistants in Staten Island
Clinicians with the same Medicare primary specialty in Staten Island, NY — not a recommendation.
Clinician information
| Credential | PA |
|---|---|
| Graduation year | 2025 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1194515882 |
| 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