Regan O'Brien, M.D.
NPI 1578950978 · Psychiatry Physician · Scottsdale, AZ
Enrolled with Medicare as Practitioner - Psychiatry · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Regan O'Brien, M.D. is a Psychiatry Physician provider in Scottsdale, AZ (NPI 1578950978).
Provider details
- NPI number
- 1578950978
- Entity type
- Individual
- Primary specialty
- Psychiatry PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- No
- License
- 53579 (AZ)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
11 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Practice location
Mailing address
Registry dates
- Enumerated
- 2015-04-23
- Last updated
- 2026-02-13
- Certified
- 2026-02-13
Frequently asked questions
- What is Regan O'Brien's NPI number?
- Regan O'Brien's National Provider Identifier (NPI) is 1578950978, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Regan O'Brien's specialty?
- Regan O'Brien is listed in the NPPES registry with a primary specialty of Psychiatry Physician (Allopathic & Osteopathic Physicians).
- Where is Regan O'Brien located?
- Regan O'Brien's practice location on file with NPPES is 2700 N Hayden Rd Apt 2094, Scottsdale, AZ 85257-1754.
- What is Regan O'Brien's phone number?
- The practice phone number listed in the NPPES registry for Regan O'Brien is (602) 559-1920.
- Does Regan O'Brien accept Medicare?
- Regan O'Brien is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Regan O'Brien's NPI active?
- Yes — Regan O'Brien's NPI (1578950978) is active in the NPPES registry as of the last update on 2026-02-13.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.