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Dennis Williams MFT

2 specialties440 E Commonwealth Ave, Fullerton, CA
5.00

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
Insurances accepted
99% of patients have successfully booked with these insurances
UnitedHealthcare
UnitedHealthcare Oxford
Cigna
Aetna
Oscar Health Insurance Co.
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Available appointments
Dennis Williams MFT
440 E Commonwealth Ave, Ste 205, Fullerton, CA 92832
All provider availabilityAll provider availability
Today, Apr 23 – Wed, May 6
Insurances accepted
99% of patients have successfully booked with these insurances
UnitedHealthcare
UnitedHealthcare Oxford
Cigna
Aetna
Oscar Health Insurance Co.
1 office location
Dennis Williams MFT
440 E Commonwealth Ave, Ste 205, Fullerton, CA 92832
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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
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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
87 reviews
Most relevant
Dennys a cool cat. we had our second session yesterday and I find myself looking forward to our next session.
Verified patient
empathy, something I wasn't taught as a kid but can help change a lot of things in our lives.
Verified patient
Trying to heal my inner child and I am working on that using attachment theory.
Thank you, Denny, for helping me navigate my family struggles, especially during the holiday.
Verified patient
Therapy continues to be a better experience since I started with Mr. Williams
Denny thank you for having in person appointments.
Verified patient
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.
Verified patient
Solid session
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.
Verified patient
Enjoy having the in-person sessions.
Verified patient
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.
Verified patient
I appreciate the flexibility in accommodating my schedule, my schedule changes week to week, and he's been helpful in working with me.
Verified patient
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
Verified patient
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!
Verified patient
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!!!
Verified patient
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.
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
Verified patient
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.
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.
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.
Verified patient
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.
Five stars
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.
I appreciate you, Denny!!!!!
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.
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.
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.
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.
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.
Verified patient
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.
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.
Verified patient
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.
Verified patient
Five Stars
Verified patient
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.
Verified patient
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.
Verified patient
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
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.
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.
Verified patient
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!
Verified patient
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.
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.
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.
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.
Verified patient
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.
Verified patient
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!
Verified patient
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.
Verified patient
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!
Verified patient
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.
Verified patient
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.
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
Verified patient