Katherine Mattea, MA, LMFT, CA | Psychotherapist

About Katherine Mattea

Focus areas

Anxiety

Bipolar Disorder

Gender Affirming Counseling

Attention-Deficit / Hyperactivity Disorder (ADHD)

Couples Therapy

Men's Mental Health Issues

Bereavement / Grief Counseling

Depression

Clientele seen

Teenagers (13-17)

Individuals

Young adults (18-24)

Adults (25-64)

Treatment approaches

Acceptance and Commitment (ACT)

Mindfulness-Based (MBCT)

Cognitive Behavioral (CBT)

EMDR

Identity

Gender

Female

Languages spoken

English

Getting to know Katherine Mattea

Katie Mattea helps teens and adults navigate emotional challenges, relationship concerns, and identity-related stress with warmth, clarity, and evidence-based care. Serving clients across California through LifeStance Health, she provides a supportive space where individuals and couples can address anxiety, depression, and trauma while building practical skills for lasting change. Her approach balances compassion with clinical insight, helping clients feel understood while moving toward meaningful goals. A core focus of Katie's work is supporting individuals exploring women's issues and sexuality, including coming out, self-confidence, and self-compassion. She is deeply passionate about helping clients develop a more accepting relationship with themselves, especially during periods of identity exploration or life transition. Katie offers affirming, inclusive care for LGBTQ+ clients and is committed to creating a therapy environment where authenticity, safety, and respect are central to the healing process. Katie treats teens and adults in individual therapy and provides couples therapy for partners seeking healthier communication, deeper connection, and repair after conflict. Her clinical interests include anxiety, depression, and couples issues, and she integrates Cognitive Behavioral Therapy (CBT), EMDR, and Couples/Marital Counseling, along with additional evidence-based approaches when appropriate. Therapy with Katie is collaborative and tailored, helping clients strengthen insight, resilience, and emotional regulation. Outside of her clinical work, Katie is an avid volleyball player, participating in both indoor and grass leagues throughout the week. She enjoys discovering new music, attending music festivals, reading in relaxing outdoor spaces, and exploring new restaurants and experiences with friends and loved ones.

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In-network insurances

Aetna

BlueCross BlueShield

Cigna

UnitedHealthcare

200+ more in-network plans

Popular visit reasons

Depression

New Patient Visit

Pediatric Attention-Deficit / Hyperactivity Disorder (ADHD)

Pediatric Sexual Abuse Counseling

Psychotherapy

Psychotherapy Intake / Initial Visit

Therapy

Young Adult Issues

Depression

New Patient Visit

Pediatric Attention-Deficit / Hyperactivity Disorder (ADHD)

Pediatric Sexual Abuse Counseling

Office location

Katherine Mattea, MA, LMFT also offers online video visits for patients

LifeStance Health - Southern California- 2

4540 Kearny Villa Rd, Ste 103, San Diego, CA 92123

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Education and background

Practice names

LifeStance Health - Southern California- 2

Education and training

Point Loma Nazarene University, Master's in Clinical Counseling

NPI number

1841965290

Patient reviews

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Frequently asked questions

How soon can I make an appointment with Katherine Mattea?

Generally, Katherine Mattea has appointments available on Zocdoc within 1 week. You can see Katherine Mattea's earliest availability on Zocdoc and make an appointment online.

Is Katherine Mattea accepting new patients?

Katherine Mattea generally accepts new patients on Zocdoc. You can see Katherine Mattea's earliest availability on Zocdoc and schedule an appointment online.

Does Katherine Mattea accept my insurance?

Choose your insurance plan to verify if Katherine Mattea is in-network.

Can I make an appointment with Katherine Mattea online?

Yes, you can make an appointment online with Katherine Mattea using Zocdoc. It’s simple, secure, and free.

What practice does Katherine Mattea work with?

Katherine Mattea works with LifeStance Health - Southern California- 2.

Where is Katherine Mattea's office located?

Katherine Mattea has 2 office locations in San Diego, view full addresses on Katherine Mattea's profile.

What are common reasons for patients to see Katherine Mattea?

Katherine Mattea frequently sees patients for Depression, New Patient Visit, Psychotherapy, Psychotherapy Intake / Initial Visit, and Therapy. You can see other visit reasons for Katherine Mattea on their profile.