Gavin O'Brien, LICSW
NPI 1659431211 · Clinical Social Worker · Manchester, NH
Enrolled with Medicare as Practitioner - Clinical Social Worker · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Gavin O'Brien, LICSW is a Clinical Social Worker provider in Manchester, NH (NPI 1659431211).
Provider details
- NPI number
- 1659431211
- Entity type
- Individual
- Primary specialty
- Clinical Social WorkerBehavioral Health & Social Service Providers
- Credential
- LICSW
- Sex
- Male
- Sole proprietor
- No
- License
- 1838 (NH)
Specialties & taxonomies
Behavioral Health & Social Service Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
19 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
- 2006-12-12
- Last updated
- 2021-04-01
- Certified
- 2021-04-01
Frequently asked questions
- What is Gavin O'Brien's NPI number?
- Gavin O'Brien's National Provider Identifier (NPI) is 1659431211, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Gavin O'Brien's specialty?
- Gavin O'Brien is listed in the NPPES registry with a primary specialty of Clinical Social Worker (Behavioral Health & Social Service Providers).
- Where is Gavin O'Brien located?
- Gavin O'Brien's practice location on file with NPPES is 1555 Elm St, Manchester, NH 03101-1203.
- What is Gavin O'Brien's phone number?
- The practice phone number listed in the NPPES registry for Gavin O'Brien is (603) 668-4111.
- Does Gavin O'Brien accept Medicare?
- Gavin 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 Gavin O'Brien's NPI active?
- Yes — Gavin O'Brien's NPI (1659431211) is active in the NPPES registry as of the last update on 2021-04-01.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.