Obsessive compulsive disorder - OCD treatment and therapy from NOCD
OCD therapist Mary Harfst, Licensed Therapist, LCSW, LCSW-C, ACSW, Licensed OCD Therapist

Mary Harfst

Licensed Therapist, LCSW, LCSW-C, ACSW

University of Maryland

Want to work with me or a member of my team? Schedule a free call with our team.

My experience with treating OCD:

My passion is helping those with OCD maximize their quality of life. OCD is debilitating, but I know that receiving the appropriate treatment can bring back your life. I’ve been a licensed therapist for over 30 years. I graduated from the University of Maryland, and have specialized training in Exposure and Response Prevention (ERP) therapy.


About Me

You may have learned that OCD can be extremely time-consuming and takes away your energy. The obsessions and compulsions cause significant emotional distress as it interferes with your day-to-day responsibilities and relationships. OCD is also treatable, and with the right guidance, you can learn to manage it. I can teach you how. It brings me great joy when people tell me how far they’ve come in such a short period of time using ERP therapy. People have said that I conduct sessions with compassion, understanding and acceptance. As your therapist, I will be here to support and encourage you through the entire process. Together, we can overcome your OCD.

NOCD Therapists are specialists in OCD

Each of our therapists is trained by our world-renowned clinical leadership team.
Learn more about our training >

Welcome Video


  • Maryland
  • Pennsylvania

What our members say about
Mary Harfst


Sep 27, 2022

Can't say a whole lot it was more of an intake than therapy, but really looking forward to the outcome


May 25, 2022

NOCD and Mary have absolutely revolutionized my life. Therapy has allowed me to take back my life. I am actually living, doing things I enjoy with the people I love with minimal disruption from my intrusive thoughts. I was buried under my OCD for so long, and I finally feel like I have come up for air. I am getting to know this different version of myself, and I cannot tell you how liberating it is to know that life outside of OCD exists and is beautiful.


May 02, 2022

Mary is amazing. She is the best, get appointment today if you can. She’s helped me through some tough times and i thank her and NOCD for everything they have/ are doing.


Jan 20, 2022

Mary is the perfect at helping me see which direction is OCD based, and what direction is reality based.


Dec 21, 2021

She was firm and held me accountable for getting off track with my ERP, but she was fair. She was exactly what i needed to hear.

Want to work with one of our licensed therapists? Schedule a call with our team.