Provider Profile
Gillian B. O'Brien
Unclaimed ProfileAbout Gillian O'brien
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Specialty
Credentials & Licensing
Source: NPPES NPI Registry
Contact Information
- (781) 350-4430
- Email not available
Practice Locations
42 HIGH ST
Medford, MA 02155
Related providers
Connections drawn from the registry and from what providers have told us. A link here is not a referral or an endorsement.
Other mental health counselors at this location 8
Same specialty, same street address — most likely the same department or group.
Related specialists at this location 3
Clinically related specialties at the same address — the people this provider most likely works alongside.
Also at this address 4
Providers at the same street address. Each files their own registry entry, so a shared practice often appears under several different names.
More connections — 8 related providers in 1 group
Common questions
What kind of doctor is Gillian B. O'Brien?
Gillian B. O'Brien is a mental health counselor in Medford, MA. That is the designation recorded for this NPI in the federal registry.
NPI registry
What is Gillian B. O'Brien's address?
Gillian B. O'Brien is listed at 42 High St, Medford, MA 02155. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
How can I make an appointment with Gillian B. O'Brien?
The number on file is (781) 350-4430. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is the NPI for Gillian B. O'Brien?
Gillian B. O'Brien's National Provider Identifier is 1841177417. It is issued by the Centers for Medicare & Medicaid Services and is unique and permanent — it does not change if they move practice.
NPI registry
How much experience does Gillian B. O'Brien have?
Gillian B. O'Brien has 1+ years experience. Registered with an NPI since 2025. National Provider Identifiers only began in 2005, so a provider who qualified earlier may have practiced for longer than this.
NPI registry
Is Gillian B. O'Brien's profile verified?
Not yet. This profile is built from public federal data and has not been confirmed by Gillian B. O'Brien. If this is you, claiming it is free.
Guide.md
Provider data sourced from the NPPES NPI Registry and CMS public datasets. Information is provided for reference and is not medical advice.