Physician Profile
Unclaimed ProfileAbout O'BRIEN
Timothy J O'Brien, PhD is a clinical psychologist practising in Fountain Valley, CA. Timothy is also listed as specialising in psychologist — clinical.
Summarised automatically from public NPI registry and CMS Medicare data. Not written or reviewed by this provider. Claim this profile to replace it.
Education & Training
Areas of Expertise
Common questions
What kind of doctor is Dr. O'Brien?
Dr. O'Brien is a clinical psychologist in Fountain Valley, CA. This is the primary taxonomy recorded against the NPI in the federal registry, listed there as “CLINICAL PSYCHOLOGIST”.
NPI registry
What is Dr. O'Brien's address?
Dr. O'Brien is listed at 10061 TALBERT AVE # 234, Fountain Valley, CA 92708. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
How can I make an appointment with Dr. O'Brien?
The number on file is (949) 526-9504. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is the NPI for Dr. O'Brien?
Dr. O'Brien's National Provider Identifier is 1275924557. 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
Where did Dr. O'Brien train?
Dr. O'Brien attended Other, graduating in 2012. This comes from the CMS National Downloadable File.
CMS public data
How much experience does Dr. O'Brien have?
Dr. O'Brien has 14 years experience. Calculated from a graduation year of 2012, reported in the CMS National Downloadable File.
CMS public data
What procedures does Dr. O'Brien perform?
According to Medicare billing data, Dr. O'Brien provides treatments such as evaluation of neuropsychological test, each additional hour and administration of psychological or neuropsychological test, each additional 30 minutes. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Is Dr. O'Brien's profile verified?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. O'Brien. If this is you, claiming it is free.
Guide.md
Licensing & Certification
Source: NPPES NPI Registry
Contact Information
- (949) 526-9504
- Email not available
Practice Locations
10061 TALBERT AVE # 234
Fountain Valley, CA 92708
Procedures Most Often Billed to Medicare
728 services · 366 patients · 5 distinct codes
| Procedure | Type | Code | Services |
|---|---|---|---|
| Evaluation of neuropsychological test, each additional hour | Treatment | 96133 |
292 |
| Administration of psychological or neuropsychological test, each additional 30 minutes | Treatment | 96137 |
216 |
| Psychiatric diagnostic evaluation | Treatment | 90791 |
74 |
| Administration of psychological or neuropsychological test, first 30 minutes | Treatment | 96136 |
73 |
| Evaluation of neuropsychological test, first hour | Treatment | 96132 |
73 |
Source: CMS Medicare public data. Shows how often procedures were billed — not quality of care or patient satisfaction.
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Claim this profileRelated providers
Connections drawn from the registry and from what providers have told us. A link here is not a referral or an endorsement.
Other clinical psychologists at this location 2
Same specialty, same street address — most likely the same department or group.
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.
Other clinical psychologists in Fountain Valley 4
Same specialty, same city.
More connections — 24 related providers in 3 groups
Trained at Other 8
Other providers in the same specialty who trained at the same institution.
Class of 2012 at Other 8
Providers who graduated from the same medical school in the same year.
Also performs Evaluation of neuropsychological test, each additional hour 8
Providers in CA who bill this service to Medicare most often.
Provider data sourced from the NPPES NPI Registry and CMS public datasets. Information is provided for reference and is not medical advice.