Quick answers
- Does Regan V. O'Brien accept Medicare assignment?
- Yes. Medicare's clinician data says Regan V. O'Brien accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
- What is Regan V. O'Brien's NPI number?
- 1578950978. 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 Regan V. O'Brien is enrolled with Medicare (CMS data updated October 2, 2026).
- 1300 N 12th St, Suite 320Phoenix, AZ 85006 (602) 839‑6800
Group practices
Medicare enrollment lists Regan V. O'Brien as a member of this group (CMS data updated October 2, 2026).
- Banner - University Physician Specialists LLC348 clinicians in the group
Specialties
- Psychiatryprimary
Other psychiatrists in Phoenix
Clinicians with the same Medicare primary specialty in Phoenix, AZ — not a recommendation.
Other clinicians in Banner - University Physician Specialists LLC
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Northeastern Ohio University College Of Medicine |
| Graduation year | 2015 (11 years since medical school) |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1578950978 |
| 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 October 2, 2026, retrieved October 29, 2026
- 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