What patients are saying
Overall rating
5.00
Average wait time
5.00
Bedside manner
5.00
“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.”
Chloe J.April 12, 2026Video visit
“I appreciate the flexibility in accommodating my schedule, my schedule changes week to week, and he's been helpful in working with me. ”
Jessie C.April 8, 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 / Marital
Cognitive Behavioral (CBT)
Family Systems
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
84 reviews
Most relevant
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
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
Therapy continues to be a better experience since I started with Mr. Williams
April 12, 2026Initials hiddenVideo visit
Denny thank you for having in person appointments.
Less than 6 months agoJessie C.Verified patient
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
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
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 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
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
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
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 appreciate you, Denny!!!!!
March 20, 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
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
Starting off the New Year the best I can and thank you, Mr. Williams, for your help. Looking forward to what 2026 has to bring for us all!
January 2, 2026Danny M.Verified patientVideo visit
Younger therapist who get some of the things I have endured. I had an older therapist before, and there was a big disconnect with our sessions.
January 2, 2026Richard R.Verified patient
I've been seeing this doctor for several sessions now, and it has been going well. I found him on here, and I'm happy about my choice. I've had several therapists over the years, and this is off to a great start.
This doctor does give me the flexibility to sometimes do appointments at the office and sometimes on Zoom.
January 2, 2026Cindy L.Verified patient
Thank you for your help, Mr. Williams, even around the holidays. I felt a bit less lonely this season, and thank you for allowing me to have two sessions as well.
December 29, 2025Initials hiddenVideo visit
I just finished the first session today. Off to a good start, there is a lot to cover in the intake, and I appreciated how clear and thorough the process was. I'll report back once I've had a few more sessions, and I am thankful for the reviews in helping me find a good match.
December 29, 2025Jesse C.Verified patientVideo visit
Merry Christmas, Denny. Thank you for helping my holiday season feel a bit better. If anyone else reads this, please see if anything resonates with you and book an appointment with Denny. You deserve to be happy.
December 22, 2025Jessie C.Verified patientVideo visit
Denny will be seeing me on Christmas Eve, and I'm thankful for that. Holidays are tough this year, and I'm looking forward to the session.
Thank you, Denny, and Happy Holidays! If you are feeling sad right now or don't know what to do, reach out to Denny!
December 19, 2025Jessie C.Verified patientVideo visit
I am currently working on issues with my communication and marriage, and I have seen progress, as has my wife. It was remarkable to hear how some minor adjustments, as well as the work we've been doing, have been transforming my life.
December 17, 2025Richard R.Verified patientVideo visit
He is a great therapist and person. If you're unsure about therapy, have had trouble finding a good therapist or anything related to this, reach out to Mr. Williams as he can help you navigate these tough times and especially with the holidays!
December 10, 2025Danny M.Verified patientVideo visit
I've been seeing Doctor Williams for a while now, and I've seen the difference it's made in my life and my family's. I've learned to control my anger better. I still need work, but I am making progress I did not know I could have. Anger was always a reaction and never a thought, but I see that I do have more control than I thought I did.
December 8, 2025Jessie C.Verified patientVideo visit
Just want to say if any of you are feeling in a funk, feel disconnected from friends/family, or seem to have issues with people all the time, Denny is the guy, trust me.
December 6, 2025Initials hiddenVideo visit
I've had a few therapists over the years, and I've enjoyed some more than others. Denny has helped me begin to work through my deepest and darkest insecurities. I've opened up about things that I struggled to talk to others about, especially males. I learned later in life about BPD and anxious attachment, and I wanted to stop destroying every relationship I've ever had. I've said some horrible things to people, I've thrown people out of my life for the most minor things, because those deep wounds from my mother were never healed.
I went to therapy over and over again, and each time it was like a Band-Aid. One thing Denny said to me earlier was that short-term therapy may often be a band-aid if it only treats the current symptoms and not the root cause. Believe it or not, out of all the therapists I've had, none of them have ever said that, and it resonated with me.
I'm starting to like myself. I can't go as far as loving myself quite yet, but we're on the right path
Thank you, Denny
December 3, 2025Jessie C.Verified patient
Another great session with the doc. Slowly getting better as a man and husband. My wife has said she's noticed a lot of changes, and for a long time, I thought I was improving in therapy throughout the years with different therapists. Things have been different with the doc and I enjoy our sessions and the person I am.
December 1, 2025Danny M.Verified patientVideo visit
This Clinican is very open, knowledgeable, and non-judgmental. I appreciate his candidness when sharing about himself and the guidance provided toward achieving my personal goals.
November 19, 2025Josephine A.Verified patientVideo visit
Another solid session
October 13, 2025Danny M.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?
84 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.