What patients are saying
Overall rating
5.00
Average wait time
5.00
Bedside manner
5.00
“therapy is difficult, I did not know what I was expecting but things have been hard and I find myself going into topics and deeper family stuff I did not think I was going to and it's been a journey. I didn't think I'd want a male therapist for some of these things but it's been great so far.”
Bernard Z.May 12, 2026Video visit
“Mr. Williams! You have helped Alex and me more than you'll ever know, and I know we have so much to look forward to.”
Nick B.May 12, 2026Video visit
About Dennis Williams
Clientele seen
Children (<13)
Adults (25-64)
Teenagers (13-17)
Seniors (65+)
Young adults (18-24)
Individuals
Treatment approaches
Attachment-based
Family Systems
Cognitive Behavioral (CBT)
Family / Marital
Emotionally Focused
Humanistic
Identity
Gender
MaleLanguages spoken
English
Getting to know Dennis Williams
I have served my clients in Fullerton for more than nine years. If you are looking for a sense of acceptance from the world and those around you, I invite you to contact me. We will start by setting realistic goals and create a plan to make those goals a reality.
A struggle I see often is clients not wanting to be a burden to those around them yet constantly being there for others, leaving them feeling empty and alone. I want you to feel important, loved, desired, understood, and that you matter just as much as you make others matter to you.
I've worked extensively with individuals from all walks of life, especially young children, adolescents, young adults, and college students. I specialize in attachment-the ability to help form healthy and secure relationships and communication.
I hold a Master's degree in Marriage and Family Therapy from California State University, Fullerton, which has equipped me with the skills to support you through your challenges.
If you no longer want to walk alone, I invite you to reach out for a free fifteen-minute consultation. Whether you're struggling with emotions, relationships, or anything else bringing stress to your life, I can help.
Is this doctor in your insurance network?
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In-network insurances
Aetna
Cigna
UnitedHealthcare
UnitedHealthcare Oxford
Out-of-pocket fees and assistance
Initial session: $200 for 60 minutes
Ongoing session: $160 for 45 minutes
Office location
Dennis Williams, LMFT also offers online video visits for patients
Education and background
Practice names
Education and training
- California State University, Fullerton, Master's in Marriage and Family Therapy
Professional memberships
- American Psychological Association
- American Association for Marriage and Family Therapy
NPI number
1043715840
Patient reviews
All reviews have been submitted by patients after interacting with the practice.
Overall rating
5.00
Wait time
5.00
Bedside manner
5.00
Your trust is our top concern, so providers can't pay to alter or remove reviews. We also don't publish reviews that contain any private patient health information. Learn more here
100 reviews
Most relevant
Mr. Williams! You have helped Alex and me more than you'll ever know, and I know we have so much to look forward to.
May 12, 2026Nick B.Verified patientVideo visit
Dennys a cool cat. we had our second session yesterday and I find myself looking forward to our next session.
March 21, 2026Nick B.Verified patientVideo visit
empathy, something I wasn't taught as a kid but can help change a lot of things in our lives.
April 16, 2026Nick B.Verified patientVideo visit
Thank you for the worksheets and help Doc - Richard from Fullerton, you know!
April 22, 2026Initials hiddenVideo visit
Trying to heal my inner child and I am working on that using attachment theory.
April 8, 2026Initials hiddenVideo visit
Thank you, Denny, for helping me navigate my family struggles, especially during the holiday.
December 11, 2025Jessie C.Verified patientVideo visit
booked with dennis because of his reviews and I have not been disappointed.
April 29, 2026Initials hiddenVideo visit
Therapy continues to be a better experience since I started with Mr. Williams
April 12, 2026Initials hiddenVideo visit
No complaints, and Denny, thank you for your help.
April 27, 2026Initials hiddenVideo visit
Denny thank you for having in person appointments.
Less than 6 months agoJessie C.Verified patient
therapy is difficult, I did not know what I was expecting but things have been hard and I find myself going into topics and deeper family stuff I did not think I was going to and it's been a journey. I didn't think I'd want a male therapist for some of these things but it's been great so far.
May 12, 2026Bernard Z.Verified patientVideo visit
Enjoying the sessions! It's nice that he offers both face sessions and Zoom, I like being able to meet face to face where other therapists are often offering only zoom.
May 6, 2026Nick B.Verified patientVideo visit
I have been seeing a decrease in anxiety, which is what I wanted before I decided to take meds or not. My last therapist wanted me to take medication, which felt gross, and Denny said we can explore that down the road if needed, and there was no pressure.
May 6, 2026Bernard Z.Verified patientVideo visit
Good session
May 4, 2026Initials hiddenVideo visit
nice guy, he has given me some small tips to help with my communication, to be honest I didn't think this is something that would be mentioned but the little adjustments has already made a big difference. Who would've thought!!!
May 4, 2026Bernard Z.Verified patientVideo visit
I’ve had two sessions so far and it’s been a really positive experience. From the start, I felt comfortable and not judged, which made it a lot easier to open up. They ask thoughtful questions, really listen, and help me see things from perspectives I hadn’t considered before.
Even in just a short time, I’ve already started to gain more awareness about my patterns and feel a bit more hopeful about making changes. I never feel rushed, and it feels like they genuinely care about helping me work through things at my own pace.
So far, I’m really glad I started and I’m looking forward to continuing.
April 29, 2026Bernard Z.Verified patientVideo visit
My fourth session with this provider, and it's going well. I will continue to post updates as time goes on because I have seen some therapists fall off, or it feels too much like a friendship! Therapy isn't for friends and if you're stuck with a therapist where it feels that way then you may want to consider another option.
April 27, 2026Chloe J.Verified patientVideo visit
Hello everyone, this is my first appointment with Dr. Denny Williams, and I have been attending therapy on and off for about 15 years, starting from when I was 9. I have a lot of trauma from my childhood and things that happened to my brothers and me. I have learned tools and how to cope in certain situations, but now I want to heal. I hope Dr. Denny Williams is the person who can help me heal.
April 22, 2026Bernard Z.Verified patientVideo visit
I have been attending counseling for one month and I do like it. I typically don't leave many reviews, not good ones at least, but I like the way I've felt in a short period of time, and it's been different than other experiences in the medical field.
April 20, 2026Chloe J.Verified patientVideo visit
Solid session
April 20, 2026Initials hidden
I can't say thank you enough Mr. Williams, you've helped my relationship with my wife and other important people in my life get so much better.
April 20, 2026Richard R.Verified patientVideo visit
Enjoy having the in-person sessions.
April 16, 2026Alexander B.Verified patientVideo visit
I've now had two sessions with Dennis Williams and it's going well. I do like the patience and the way he speaks to me about some of the issues has been kind. I have many things I have never shared with the world.
April 12, 2026Chloe J.Verified patientVideo visit
I appreciate the flexibility in accommodating my schedule, my schedule changes week to week, and he's been helpful in working with me.
April 8, 2026Jessie C.Verified patientVideo visit
I went ahead and booked with Dr. Williams because of his reviews, and I was not disappointed. I've been doing a few different consults lately, and I felt a strong connection with him almost instantly. He did a great job at making me feel comfortable. Therapy can be uncomfortable, and having a clinician who knows what they're doing makes it a better experience. I've had lots of doctors over the years, from psychiatrists to specialists who literally do not care about people and have gotten into this field for other reasons than wanting to help people. Thank you, Doctor. -Alex B
April 7, 2026Alexander B.Verified patientVideo visit
I've seen Denny about four times now, and holidays have been tough with the recent drift in my family. It was hard getting through Christmas, etc., and I was expressing how Easter is tough because I would spend it with my family, at church, and surrounded by people who I feel love me. I didn't have that this year, and Denny offered to see me on Easter, which was nice, but I felt bad about taking him away from his plans. Thank you for the suggestion, and I hope your Easter went well, man!
April 6, 2026Nick B.Verified patientVideo visit
New client here, first, I was in dire need to be seen as soon as possible, and I was able to send him an email, and he got me in on a Sunday and Easter Sunday of all days! I can't express how thankful I am, Mr. Williams. I am looking forward to our next session!!!
April 6, 2026Chloe J.Verified patientVideo visit
Denny has been kind while also holding me accountable. I do not have a good relationship with men in my life and it's been nice having a healthy dynamic with Denny.
April 4, 2026Initials hiddenVideo visit
THIS REVIEW IS FOR ANYONE CONFUSED ON WHERE TO BEGIN.
I never believed in therapy let a lone really new what it was. I grew up in a tough family with abuse, drug use and lots of other stuff. My family would laugh at the idea of therapy, medication, or mental health in general. I'm hear to tell you that it's the opposite of what everyone in your life is telling you.
Make the choice for yourself, make the choice for you to be happy, make the choice for you to have a future.
I picked a dude aka Denny because I felt more comfortable and while it took me sometime to talk about some stuff I never have, I now feel better about some of it and have talked to my wife about a few things.
-Richard
April 4, 2026Richard R.Verified patientVideo visit
i've felt listened to and heard in therapy. My last therapist would listen to me talk and not say much, and I thought that's what therapy was, and it felt like a waste of time, but I don't feel that way right now.
April 4, 2026Initials hiddenVideo visit
I've been trying out a few different therapists and after a few sessions I've decided on Mr. Williams. He is younger than my prior therapists but it's been a fresh and different perspective than some other ones.
April 4, 2026Initials hiddenVideo visit
Hello Dennis, thank you for the sessions. I don't have much experience with opening up emotionally but my wife told me I needed to be in therapy to work on it. I am hoping Dennis is the man and can help me with it.
March 30, 2026Nick B.Verified patientVideo visit
Nice dude who I feel comfortable with sharing personal stuff with. I had a female therapist before but I sometimes felt judged because of what I would share. I'm not perfect but if I am being open you think someone would try to make you feel okay. I feel that way with Denny.
March 30, 2026Initials hiddenVideo visit
Five stars
March 27, 2026Initials hiddenVideo visit
Counseling is new to me, as I grew up in a family where we did not believe in therapy or mental health, and that added to my pain. I now know counseling is for different things, and I have gotten my brother and sister to also pursue therapy. if you have been told that it's not real or for the weak, those are all the people who do not work on themselves.
March 21, 2026Initials hiddenVideo visit
I came into therapy feeling overwhelmed by depression and honestly unsure if anything would really help. Working with my therapist completely changed that. From the beginning, they created a space where I felt heard, understood, and never judged. They helped me make sense of what I was feeling instead of just trying to push it away.
Over time, I started to understand my patterns, my triggers, and how my thoughts were affecting my mood. More importantly, I learned practical tools that I could actually use in my daily life to manage the heavy moments. Things that once felt impossible started to feel manageable.
What stood out most was how genuine and consistent they were. They didn’t just listen—they challenged me in the right ways and supported me through it. I’ve grown in ways I didn’t expect, and I feel more stable, confident, and hopeful than I have in a long time.
If you’re struggling with depression, I truly can’t recommend therapy—and this therapist—enough.
Less than 3 months agoInitials hiddenVideo visit
I appreciate you, Denny!!!!!
March 20, 2026Initials hiddenVideo visit
Sessions have been great, and he accepts lots of insurance, which has been nice. I liked that he had a website; surprisingly, a lot did not.
March 16, 2026Initials hiddenVideo visit
The second appointment was nice. We are talking about family history, and things are coming up that I was unaware of the connections to some of my struggles now.
March 12, 2026Initials hidden
I came in to see Denny because I was struggling with anxiety in my relationships and had a hard time standing up for myself. I would overthink everything, fear upsetting people, and often ignore my own needs just to keep the peace. Early on, I learned that I struggle with anxiety, codependency, and anxious attachment. That awareness alone was powerful. Denny helped me understand where these patterns came from and how they were showing up in my daily life. He gave me practical tools to set boundaries, communicate clearly, and calm my anxious thoughts instead of letting them spiral.
Since starting therapy, things have changed in the best way. I feel more confident, more secure, and much more grounded. My relationships feel healthier and more balanced. I can speak up for myself without guilt and trust that I won’t lose people for having needs. I genuinely feel happier and more at peace, and I’m so grateful for the growth I’ve experienced.
March 3, 2026Danny M.Verified patient
Working with my therapist truly helped me find myself again. I came in feeling anxious, depressed, and disconnected from who I was. Through patience, insight, and compassion, they helped me understand my patterns, challenge negative thoughts, and build healthier coping skills. For the first time in a long time, I feel genuine happiness and a sense of calm. I’ve learned how to manage my anxiety instead of letting it control me. I’m incredibly grateful for the growth, clarity, and confidence I’ve gained through this journey.
March 3, 2026Cindy L.Verified patientVideo visit
This is a new provider for me and the first couple of sessions were pretty standard intake but I did feel heard and a lot of the questions that were asked were on point with my experience. I have high hopes for this one.
March 2, 2026Initials hiddenVideo visit
Having my kids back and being the dad I always needed to be has helped my life a lot. I started off therapy court ordered and continue on my own because I have seen the changes in my life.
February 27, 2026Danny M.Verified patientVideo visit
Five Stars
February 26, 2026Danny M.Verified patientVideo visit
Before starting therapy, I had never even heard of attachment theory, let alone understood how deeply it shapes relationships. I didn’t realize how much my attachment style influenced the way I connected, reacted, and communicated. Through working with Mr. Williams, I learned that relationships and communication are far more complex—and hopeful—than what most of us grow up believing. I gained practical tools and insight that completely changed how I show up with others. I’m incredibly grateful for the clarity and growth I’ve experienced.
February 26, 2026Jessie C.Verified patientVideo visit
Working with Mr. Williams has been one of the best decisions I’ve made for my mental health. From the start, he created a safe, supportive space where I felt heard and understood. Through our sessions, I’ve developed healthier coping skills and learned how to pause, reflect, and respond instead of reacting emotionally.
He has helped me build greater self-awareness and insight into my patterns, allowing me to approach myself with more compassion. I’m now better at identifying and communicating my emotions, which has improved both my inner life and my relationships.
Most importantly, I genuinely enjoy my life more. I feel more present, confident, and equipped to handle challenges. I’m truly grateful for the growth I’ve experienced through working with Mr. Williams.
February 25, 2026Cindy L.Verified patientVideo visit
This journey of secure attachment has not been easy, and I still vacillate between anxious/insecure and secure, but the reactions I'm having are a lot different from those I had a year ago. I've been dealing with anxious attachment and BPD for a long time and everyone wanted to focus on my anxiety as if there was something wrong with me. It's been different with Denny and I am seeing the evidence right before me.
February 24, 2026Cindy L.Verified patientVideo visit
Great doctor, kind man, respectful human, and an even better person. I've known Mr. Williams for a while now, and we've had a major life change through our work. I see him less frequently, but I've always been able to increase it whenever I need to. I appreciate your flexibility, Mr. Williams, but above all, I appreciate your genuine, kind nature and the way you treat people regardless of their background.
Thank you
February 18, 2026Danny M.Verified patient
Enjoying the sessions so far, and I like his relatability across different areas. For someone who appears young, he sure has experienced a lot in life and is open about stuff. Therapists I have had in the past that I've seen for years, I felt like I did not know much about them, and now that I think about it, even felt like a stranger who knew what my soul looked like.
January 15, 2026Initials hiddenVideo visit
I appreciate this doctor, and he is the one who helped me discover using Zocdoc, which is a cool resource to have. Thank you Doctor Williams for all your help and care.
January 12, 2026Richard R.Verified patientVideo visit
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How soon can I make an appointment with Dennis Williams?
Generally, Dennis Williams has appointments available on Zocdoc within 1 week. You can see Dennis Williams's earliest availability on Zocdoc and make an appointment online.
Is Dennis Williams accepting new patients?
Dennis Williams generally accepts new patients on Zocdoc. You can see Dennis Williams's earliest availability on Zocdoc and schedule an appointment online.
Does Dennis Williams accept my insurance?
Choose your insurance plan to verify if Dennis Williams is in-network.
Can I make an appointment with Dennis Williams online?
Yes, you can make an appointment online with Dennis Williams using Zocdoc. It’s simple, secure, and free.
What practice does Dennis Williams work with?
Dennis Williams works with Dennis Williams MFT.
Where is Dennis Williams's office located?
Dennis Williams has 2 office locations in Fullerton, view full addresses on Dennis Williams's profile.
What are common reasons for patients to see Dennis Williams?
Dennis Williams frequently sees patients for Depression, New Patient Visit, Psychotherapy, Psychotherapy Intake / Initial Visit, and Sleep Problems. You can see other visit reasons for Dennis Williams on their profile.
What languages does Dennis Williams speak?
Dennis Williams speaks English.
How do patients rate Dennis Williams in reviews?
100 patients have reviewed Dennis Williams. The overall rating for this doctor is 5/5. They have a 5/5 rating for bedside manner and a 5/5 rating for wait time. You can read individual reviews and ratings on their profile.