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Edit this profileWhere to find Timothy J. O'Brien, PhD
- Fountain Valley location main office
10061 Talbert Ave # 234, Fountain Valley, CA 92708 - Long Beach location
2708 Ostrom Ave, Long Beach, CA 90815
About Dr. O'brien
Timothy J. O'Brien, PhD is a clinical psychologist practicing in Fountain Valley, CA. Timothy is also listed as specializing in psychologist — clinical. Medicare claims data shows Timothy provided 728 services to 366 patients. The services billed most often include evaluation of neuropsychological test, each additional hour, administration of psychological or neuropsychological test, each additional 30 minutes, and psychiatric diagnostic evaluation. This provider record is associated with NPI 1275924557.
Factual summary compiled by Guide.md from public records; not written by this provider.
Education & Training
Specialty
Credentials & Licensing
Medicare information
Exactly as CMS reports it (National Downloadable File, Opt-Out Affidavits, Order & Referring). Not an insurance directory; confirm coverage with the office.
Contact Information
- (949) 526-9504
- Email not available
Practice Locations
10061 TALBERT AVE # 234
Fountain Valley, CA 92708
2708 Ostrom Ave
Long Beach, CA 90815
Concerns and Conditions Addressed
Within Clinical Psychology generally. Availability varies by clinician, training and location — this profile has not been claimed, so nothing here is a personal claim by the provider.
Conditions
Most searched conditions
Abuse & trauma
Addiction
Anxiety
Behavioral
Child & adolescent
Cognitive
Dissociative
Eating & Body Image
Health & Pain
Identity
Interpersonal
Life transitions
Mood & Emotion
- Anger issues
- Bipolar disorder
- Illness anxiety disorder
- Panic disorder
- Postpartum depression
- Social anxiety disorder
- Specific phobias
Neurodevelopmental
Personal Growth
Personality
Self-harm & crisis
Sensory & neurological
Severe mental illness
Sleep
Stress & Lifestyle
Stress & lifestyle
Work & identity
Procedures & services
Most searched procedures
Assessments
Behavioral Interventions
- Acceptance and commitment therapy (ACT)
- Anger management
- Dialectical behavior therapy (DBT)
- Exposure and response prevention (ERP)
- Habit reversal training
- Prolonged exposure therapy
Brain-based therapies
Child & adolescent
Crisis & safety
Group Programs
Individual therapy
Interpersonal
Mind-Body
Parenting & Support
Psychodynamic & Integrative
- Internal family systems (IFS)
- Interpersonal psychotherapy
- Psychodynamic psychotherapy
- Schema Therapy
Relationship & family
Skill building
Sleep & Health
Specialized therapy
Stress & Lifestyle
Testing & evaluation
- ADHD Evaluation
- Bariatric Surgery Evaluation
- Emotional Support Animal Evaluation
- Forensic psychological evaluation
- Neuropsychological Testing
- Psychoeducational Testing
Therapy formats
Trauma therapy
Procedures Most Often Billed to Medicare
728 services · 366 patients · 5 distinct codes
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Evaluation of neuropsychological test, each additional hour | Treatment | 96133 |
292 | More often than most peers in Clinical Psychologist |
| Administration of psychological or neuropsychological test, each additional 30 minutes | Treatment | 96137 |
216 | More often than most peers in Clinical Psychologist |
| Psychiatric diagnostic evaluation | Treatment | 90791 |
74 | More often than most peers in Clinical Psychologist |
| Administration of psychological or neuropsychological test, first 30 minutes | Treatment | 96136 |
73 | More often than most peers in Clinical Psychologist |
| Evaluation of neuropsychological test, first hour | Treatment | 96132 |
73 | More often than most peers in Clinical Psychologist |
Source: CMS Medicare public data. Shows how often procedures were billed — not quality of care or patient satisfaction.
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 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.
Common questions
What kind of doctor is Timothy J. O'Brien?
Timothy J. O'Brien is a clinical psychologist in Fountain Valley, CA. That is the designation recorded for this NPI in the federal registry.
NPI registry
What is Timothy J. O'Brien's address?
Timothy J. 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 Timothy J. O'Brien?
The number on file is (949) 526-9504. Contact the office directly to confirm availability and scheduling.
NPI registry
What is the NPI for Timothy J. O'Brien?
Timothy J. 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 Timothy J. O'Brien train?
Timothy J. O'Brien attended Other, graduating in 2012. This comes from the CMS National Downloadable File.
CMS public data
How much experience does Timothy J. O'Brien have?
Timothy J. 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 Timothy J. O'Brien perform?
According to Medicare billing data, Timothy J. 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 Timothy J. O'Brien's profile verified?
Not yet. This profile is built from public federal data and has not been confirmed by Timothy J. O'Brien. If this is you, claiming it is free.
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