DR. JOHN MATTHEW O'BRIEN PH.D.
NPI 1720083504
Psychologist - Clinical in Portland, ME
About Dr. John Matthew O'brien Ph.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. JOHN MATTHEW O'BRIEN PH.D. (NPI 1720083504) is an individual clinical provider in Portland, Maine, licensed in Maine (PS932) and active in the NPI registry since June 2005. He is enrolled in Medicare PECOS and is a graduate of Other (1996).
NPPES Registry Identity
Specialties & Licenses
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Dr. John Matthew O'brien Ph.d. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 04101 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Other Providers at the Same Location NPPES 4
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is John O'brien's NPI number?
The NPI number for John O'brien is 1720083504. It was assigned to this individual provider in the NPPES registry on June 17, 2005.
Where is John O'brien located?
John O'brien practices at 465 Congress St Ste 700, Portland, ME 04101. The listed phone number is (207) 773-2828.
What is John O'brien's specialty?
The primary specialty registered for this NPI is Psychologist, specializing in Clinical, with taxonomy code 103TC0700X.
Is John O'brien enrolled in Medicare?
Yes. John O'brien is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
What insurance does John O'brien accept?
Health plans from Harvard Pilgrim Health Care list John O'brien as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.
When was this NPI record last updated?
The NPPES record for John O'brien was last updated on July 13, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 30 days ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.
# Dr. John Matthew O'brien, PH.D. · NPI 1720083504
Clinical provider in Portland, Maine. Individual provider, active in the CMS NPPES registry since June 17, 2005.
## Identity
- **NPI:** 1720083504 (Entity type: Individual)
- **Enumerated:** June 17, 2005
- **Primary specialty:** Psychologist - Clinical · taxonomy 103TC0700X
- **State license:** PS932 (Maine)
- **Sole proprietor:** No
## Practice location
- **Address:** 465 CONGRESS ST, STE 700, Portland, ME 04101-3539
- **Phone:** (207) 773-2828 · **Fax:** (207) 761-8150
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment
- **Medical school:** Other, class of 1996
## Record status
- **NPPES last updated:** July 13, 2026
---
Source: [NPI Profile](https://npiprofile.com/npi/1720083504) · Data from the CMS NPPES public registry.