Ian Mosier

Psychologist, PhD

Verified by Psychology Today Verified by Psychology Today

7 Endorsed

Millbrae, CA 94030

You might feel anxious, low, or numb, like you're carrying too much and can’t slow down. Maybe you're stuck in self-doubt, overwhelmed by school or work, or unsure who you are or where you're headed. Depression, trauma, insomnia, or life transitions can leave you feeling disconnected from yourself. Whether you're a teen, young adult, or navigating a new chapter in adulthood, therapy can help you understand your emotions, shift patterns, and reconnect with what matters so life feels more grounded, intentional, and meaningful. Together, we’ll create space for healing, growth, and lasting change.

I help teens and adults manage anxiety, depression, trauma, identity stress, and life transitions. We’ll process what’s painful, uncover what drives you, and build tools to improve sleep, mood, and emotional resilience. You’ll feel more grounded and better equipped to handle stress. As someone who is Sinhalese and White, I honor cultural identity in healing.

The name of my practice, Mosaic Psychotherapy, reflects the belief that healing means reclaiming and integrating all parts of your story, not erasing them. If you're feeling anxious, depressed, or stuck in trauma responses, you don't have to go through it alone. I would be honored to support you with space, care, and tools as you put the pieces together.

Call or Email Ian Mosier now for a free 15 minute consultation - (650) 640-0522

My Practice at a Glance

Available both in-person and online

Millbrae, CA 94030

(650) 640-0522

San Francisco, CA 94110

Online therapy for teens and adults in California. I offer weekday evenings and Saturday sessions. Let's find a time that works for you!

I specialize in Life Transitions, Trauma and PTSD and Identity Issues

$250 Per Session

Individual one-on-one therapy

Let's Connect (650) 640-0522

My Practice at a Glance

Available both in-person and online

Millbrae, CA 94030

(650) 640-0522

San Francisco, CA 94110

Online therapy for teens and adults in California. I offer weekday evenings and Saturday sessions. Let's find a time that works for you!

I specialize in Life Transitions, Trauma and PTSD and Identity Issues

$250 Per Session

Individual one-on-one therapy

Finances

Fees

Individual Sessions $250

Payment Methods

Health Savings Account, Mastercard, Visa

Insurance

Out of Network

My fee is $250 per 50-minute session, and payment is collected via Ivy Pay. While I don't accept insurance directly, I offer superbills, accept HSA/FSA cards, and partner with Thrizer to help with out-of-network reimbursement.

Ian Mosier

Psychologist, PhD

Call or Email me for a free 15 minute consultation now - (650) 640-0522

Ian Mosier

Psychologist, PhD

Call or Email me for a free 15 minute consultation now - (650) 640-0522

Qualifications

Verified by Psychology Today Licensed by State of California / PSY35202 Ian T Mosier

Education and Years In Practice

Attended Southern Illinois University - Carbondale , PhD in Counseling Psychology

I'm a Licensed Psychologist with a Ph.D. in Counseling Psychology and experience in public and private university counseling centers, school-based clinics, and community health. My work is grounded in evidence-based care and guided by a warm, collaborative, and values-focused approach.

Ian Mosier

Psychologist, PhD

Call or Email me for a free 15 minute consultation now - (650) 640-0522

Ian Mosier

Psychologist, PhD

Call or Email me for a free 15 minute consultation now - (650) 640-0522

Specialties and Expertise

Top Specialties

Life Transitions
Trauma and PTSD
Identity Issues

Expertise

Anxiety
Coping Skills
Cultural Adjustment
Depression
LGBTQ+
Peer Relationships
Racial Identity
Relationship Issues
Stress

I support adults navigating life transitions, trauma, anxiety, depression, and identity-related challenges. We'll work together to understand what's been hard, clarify what matters most to you, and build a path forward. Therapy may involve exploring values, learning new ways to relate to painful thoughts, and honoring the many parts that make up your story.

Ian Mosier

Psychologist, PhD

Call or Email me for a free 15 minute consultation now - (650) 640-0522

Ian Mosier

Psychologist, PhD

Call or Email me for a free 15 minute consultation now - (650) 640-0522

7 Endorsements

Stacy Agosto

Clinical Social Work/Therapist, LCSW, CADC

Ian is a highly trained and skilled therapist with a gentle and patient demeanor. He prioritizes staying up-to-date on the latest research and evidence to offer the best treatment to his clients. As a colleague I've always been able to count on him.

Pamela Wrona

Psychologist, PsyD

I highly recommend Dr. Mosier as a thoughtful and skilled therapist. He brings a strong foundation in Acceptance and Commitment Therapy (ACT), and his work is both methodical and deeply compassionate. Clients will benefit from his intentional approach.

Satveer Kler

Psychological Associate, PhD

Ian brings a rare mixture of being down-to-Earth, emotional attunement, scientific acumen for evidence-based care, and warmth, alongside multiple years of experience supporting teens, adults, and older adults while providing culturally-responsive care.

Dr. Lacey Xepoleas

Psychologist, PsyD

Dr. Mosier is a thoughtful, compassionate professional skilled in evidence-based care, including ACT. He meets you where you are and offers structured support to foster insight and meaningful progress while providing manageable tools and skills.

Dr. Brian Raines

Psychologist, PsyD

Dr. Mosier has a way of connecting with others, providing a welcoming, non-judgmental space for his clients to be themselves. I have seen the way his flexible approach to therapy and his skills with IFS and ACT have had a lasting impact on his clients.

Dr. Anna Craig

Psychologist, PhD

Dr. Mosier specializes in treating depression, anxiety, trauma, and sleep/insomnia. He is a great listener and attentive therapist who makes his clients feel heard and helps them create the change they strive for.

Hannah Rudsten

Marriage & Family Therapist, MA

Dr. Ian brings a thoughtful, collaborative, and calming presence to his work with clients. His expertise in Acceptance and Commitment Therapy and Internal Family Systems allows clients to deeper self-awareness and build emotional resilience.

Client Focus

Age

Teen ,

Adults

Participants

Individuals

Communities

Gay Allied ,

Lesbian Allied ,

Non-Binary Allied ,

Queer Allied ,

Racial Justice Allied ,

Single Parent

Ethnicity

Asian ,

Other Racial or Ethnic Background

Age

Teen ,

Adults

Participants

Individuals

Communities

Gay Allied ,

Lesbian Allied ,

Non-Binary Allied ,

Queer Allied ,

Racial Justice Allied ,

Single Parent

Ethnicity

Asian ,

Other Racial or Ethnic Background

Treatment Approach

Types of Therapy

Acceptance and Commitment (ACT)
Cognitive Processing (CPT)
Dialectical Behavior (DBT)
Person-Centered
Trauma Focused

I draw from Acceptance and Commitment Therapy, Person-Centered Therapy, IFS, and trauma-focused approaches. Therapy with me is collaborative, values-based, and grounded in evidence. We'll work together to explore what's been hard, reconnect with your inner compass, and move toward the life you want with more clarity and self-trust.

Ian Mosier

Psychologist, PhD

Call or Email me for a free 15 minute consultation now - (650) 640-0522

Ian Mosier

Psychologist, PhD

Call or Email me for a free 15 minute consultation now - (650) 640-0522

Groups

Mosaic Psychotherapy

Hosted by

Ian Mosier

Founded on the belief that healing happens through authenticity and compassion, Mosaic Psychotherapy offers therapy grounded in Acceptance and Commitment Therapy (ACT), Internal Family Systems (IFS), and Cognitive Behavioral Therapy for Insomnia (CBT-I). Support is available for adults navigating anxiety, trauma, identity exploration, major life transitions, and sleep difficulties. Each client’s experience is honored with curiosity and care in a space where all thoughts, emotions, and parts of the self are welcome. Therapy is collaborative, culturally attuned, and tailored to each person’s needs and values.

Expertise

Anxiety

Depression

Trauma and PTSD

Types of Therapy

Trauma Focused

Age

Adults

Session Cost

$250

Location

660 El Camino Real

Millbrae, CA 94030

Email Ian Mosier about this group or call - (650) 640-0522

Location

Primary Location

Millbrae, CA 94030

(650) 640-0522

Email me

My website

Additional Location

San Francisco, CA 94110

(650) 640-0522

Nearby Areas

Cities

Counties

Zips

Neighborhoods

Online therapy for teens and adults in California. I offer weekday evenings and Saturday sessions. Let's find a time that works for you!

Ian Mosier

Psychologist, PhD

Call for a free consultation now - (650) 640-0522

Online therapy for teens and adults in California. I offer weekday evenings and Saturday sessions. Let's find a time that works for you!

Ian Mosier

Psychologist, PhD

Call for a free consultation now - (650) 640-0522