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Edit this profileAt a glance
- 105 Reflections Dr, Apt. 18, San Ramon, CA 94583
About Dr. Marek
William K. Marek, PhD is a clinical psychologist based in San Ramon, CA. William is also listed as specializing in psychologist. According to Medicare claims data, William cared for 349 Medicare patients across 2,042 services. The services billed most often include psychotherapy, 30 minutes, evaluation of psychological test, first hour, and psychiatric diagnostic evaluation. The provider's National Provider Identifier (NPI) is 1851560544.
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
- (925) 275-0294
- Email not available
Practice Locations
105 REFLECTIONS DR APT. 18
San Ramon, CA 94583
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
2,042 services · 349 patients · 3 distinct codes
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Psychotherapy, 30 minutes | Treatment | 90832 |
1,750 | More than most peers in Clinical Psychologist |
| Evaluation of psychological test, first hour | Treatment | 96130 |
185 | More often than most peers in Clinical Psychologist |
| Psychiatric diagnostic evaluation | Treatment | 90791 |
107 | 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 in San Ramon 8
Same specialty, same city.
Trained at Other 8
Other providers in the same specialty who trained at the same institution.
Class of 1989 at Other 8
Providers who graduated from the same medical school in the same year.
More connections — 8 related providers in 1 group
Also performs Psychotherapy, 30 minutes 8
Providers in CA who bill this service to Medicare most often.
Common questions
What is William K. Marek's specialty?
William K. Marek is a clinical psychologist in San Ramon, CA. That is the designation recorded for this NPI in the federal registry.
NPI registry
Where can I find William K. Marek?
William K. Marek is listed at 105 Reflections Dr Apt. 18, San Ramon, CA 94583. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
How do I contact William K. Marek?
The number on file is (925) 275-0294. Contact the office directly to confirm availability and scheduling.
NPI registry
What is William K. Marek's NPI number?
William K. Marek's National Provider Identifier is 1851560544. 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
What is William K. Marek's education?
William K. Marek attended Other, graduating in 1989. This comes from the CMS National Downloadable File.
CMS public data
How long has William K. Marek been practicing?
William K. Marek has 37 years experience. Calculated from a graduation year of 1989, reported in the CMS National Downloadable File.
CMS public data
What is William K. Marek known for?
According to Medicare billing data, William K. Marek provides treatments such as psychotherapy, 30 minutes and evaluation of psychological test, first hour. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Has William K. Marek confirmed this information?
Not yet. This profile is built from public federal data and has not been confirmed by William K. Marek. If this is you, claiming it is free.
Guide.md
Guide.md listings do not constitute medical advice or an endorsement.