John Matthew O'Brien, PH.D.

Clinical Psychologist · Portland, ME

Individual Active NPI

NPI number 1720083504

Practice location

465 Congress St
Ste 700
Portland, ME 04101-3539
Phone
(207) 773-2828
Fax
(207) 761-8150

Open in Google Maps

NPI record

NPI
1720083504
Entity type
Individual (Type 1)
Enumeration date
June 17, 2005
Last updated
July 13, 2026
Sole proprietor
No

Specialties & taxonomy codes

TaxonomyCodeLicenseState
Clinical Psychologist Primary 103TC0700X PS932 ME

About Dr. O'Brien

John Matthew O'Brien, PH.D. is a healthcare provider registered in the NPI registry with the primary taxonomy Clinical Psychologist (code 103TC0700X). The practice location is 465 Congress St, Ste 700, Portland, ME 04101-3539. The NPI number 1720083504 was assigned on June 17, 2005 and the record was last updated on July 13, 2026.

Dr. O'Brien lists a license in the registry: #PS932 (ME) for Clinical Psychologist. License numbers are self-reported to NPPES; verify them with the state licensing board.

Frequently asked questions

What is the NPI number of John Matthew O'Brien, PH.D.?

The NPI number is 1720083504.

What is the phone number of Dr. O'Brien?

The phone number listed for the practice location is (207) 773-2828.

Where is Dr. O'Brien located?

465 Congress St, Ste 700, Portland, ME 04101-3539.

What is the taxonomy code for Dr. O'Brien?

The primary taxonomy code is 103TC0700X – Clinical Psychologist.

Is this information correct?

All details come from the public NPPES registry. Providers can update their record at nppes.cms.hhs.gov; changes appear here after the next weekly update.

Other Clinical Psychologist providers in Portland

All Clinical Psychologist providers in Portland, ME →