Regan O'Brien, M.D.
Psychiatry Physician · Scottsdale, AZ
Regan O'Brien, M.D. is a psychiatry physician with a practice address in Scottsdale, Arizona, and NPI 1578950978, issued on Apr 23, 2015. Check the license (Arizona 53579, as entered in NPPES) on the Arizona Medical Board; the Medicare figures below come from public CMS files.
- Name
- Regan O'Brien
- Credential
- M.D.
- Primary taxonomy
- Psychiatry Physician 2084P0800X
- License number
- 53579 AZ
Self-reported in NPPES; status is on the state search - Practice location
- 2700 N Hayden RD Apt 2094, Scottsdale, AZ 85257
- Phone
- (602) 559-1920
- Enumerated
- Apr 23, 2015
- Record last updated
- Feb 13, 2026
- Medicare enrollment
- Enrolled (PECOS I20190508000925); accepts Medicare assignment
- Medical or professional school
- Northeastern Ohio University College Of Medicine, 2015
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest psychiatry physician records → All 942 in Arizona → Look up another NPI →
Verify Regan O'Brien in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersArizona Medical Board
Search for license 53579Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
93% fewer Medicare Part D claims than the average psychiatry physician in 2024
69 Medicare Part D claims for 11 beneficiaries, against an average of 1,000 among the 35,054 providers of this specialty who prescribed in Part D.
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Bills Medicare through one group practice
- Banner - University Physician Specialists LLCPhoenix, AZ
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Regan O'Brien among 942 psychiatry physician records in Arizona
Regan O'Brien, M.D. is one of 942 psychiatry physician records with a practice address in Arizona. 67% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2015, is newer than 72% of them.
- NPI issued2015 · 72% of these records are older, 25% newer
- In a Medicare fileYes · 67% of these records are
- In the CMS Doctors and Clinicians fileYes · 41% of these records are
- Graduated2015 · median 2007 among the 382 with a school on file
- Record last updated2026 · 55% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2084P0800X and a Arizona practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Psychiatry Physician providers in Arizona
There are 942 psychiatry physician records in Arizona.
All 942 in Arizona → Every provider in Scottsdale → Psychiatry Physician nationwide →
The 8 psychiatry physician records with the nearest ZIP codes
- Daniel Link, M.D.Scottsdale, AZ 852571639223134
- Adrienne Adler-Neal, MD, PHDScottsdale, AZ 852581558990127
- Alvin Burstein, M.D.Scottsdale, AZ 852581962553412
- Brook Choulet, MDScottsdale, AZ 852581083146807
- Amelia Davis, M.D.Scottsdale, AZ 852581033347273
- Pamela Drapeau, M.D.Scottsdale, AZ 852581083751325
- Gary Grove, M.D.Scottsdale, AZ 852581871605030
- Lisa Jones, MDScottsdale, AZ 852581841493376
Common questions
What is Regan O'Brien, M.D.'s NPI number?
Regan O'Brien, M.D.'s National Provider Identifier (NPI) is 1578950978, issued on Apr 23, 2015. An NPI identifies a provider in billing; it is not a license.
Where is Regan O'Brien, M.D. located?
The NPPES record lists a practice address at 2700 N Hayden RD Apt 2094, Scottsdale, AZ, 85257. Phone: (602) 559-1920. Providers update this record themselves, so call before visiting.
How can I verify Regan O'Brien, M.D.'s license?
NPPES lists Arizona license number 53579, as entered by the provider. Search the Arizona Medical Board at https://www.azmd.gov/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Regan O'Brien, M.D. prescribe under Medicare Part D?
In 2024, Regan O'Brien, M.D. had 69 Medicare Part D claims for 11 beneficiaries; the average among psychiatry physician prescribers was 1,000. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.