Mark  Colterjohn

Mark Colterjohn

Licensed Clinical Social Worker, LCSW

Accepting new clients for daytime, afternoon, & evening appointments in Flatiron District practice (updated July 08, 2020)

Offers Online Sessions

Specialties & Expertise

  • Depression
  • Anxiety
  • Substance use
  • Trauma
  • Self-esteem
  • Relationships

Professional statement

Mark Colterjohn is a Licensed Clinical Social Worker in the Flatiron District of Manhattan who specializes in anxiety, depression, trauma, substance use challenges, and relationships. He has a strong interest and extensive background in addiction and recovery.

Mark is a relational therapist who utilizes a number of different solution-focused and goal-oriented modalities, including Cognitive Behavioral Therapy (CBT), Psychodynamic Psychotherapy, Gestalt Therapy, and Internal Family Systems (IFS). He works with his clients to better understand how their past experiences have informed who they are today and how they interact with the world around them. He also spends time finding the root cause before focusing on behavioral changes and coping strategies. What triggers a client and how often does this happen? For clients who are interested in medication, Mark will work closely with a psychiatrist to ensure all of their needs are being met.

With over two decades of experience, Mark is committed to providing his clients with the highest level of care. He tailors his treatments to each individual and is there to support them on their path towards healing. His office is conveniently located near the 23rd Street subway station.

Message to clients

One size does not fit all; I bring a breadth of experience to tailor treatment to the individual needs of a particular client. My approach is both supportive and compassionate, while also being solution-focused and goal-oriented. I view clients as resourceful and resilient in the face of adversity and will help you harness that strength to speed healing.


Depression - Providing support and promoting healing of hopelessness, low motivation and energy, sadness, irritability, sleep disturbance, and loss of interest and pleasure in life

Anxiety - Coping with excessive worry, nervousness, or stress; intense discomfort in social settings (social anxiety); sudden and intense feelings of panic (panic disorder)

Substance use - Reducing and preventing the negative impact of drug and alcohol use and addictions on physical, emotional, and relational health

Trauma - Coping and healing after threatening or scary events, such as witnessing accidents or experiencing sexual, verbal, emotional, or physical abuse

Self-esteem - Cultivating self-compassion, assertiveness, and confidence; developing ways to reduce suffering, anxiety, social withdrawal, and self-neglect

Relationships - Understanding one’s wants and needs in relationships; exploring patterns of interaction, addressing concerns, and strengthening satisfaction in relationships and dating


  • Adults (24+)
  • Couples
  • Seniors (65+)
  • Young adults (18-24)


  • Medicare

Out-of-pocket fees

  • Ongoing sessions: $150 (45min)
  • Initial session: $150 (45min)


Remote video therapy sessions offered? Yes

Flatiron District practice

928 Broadway

Suite 500

New York, NY 10010


  • Mon 10:00am-7:00pm
  • Tue 10:00am-7:00pm
  • Wed 10:00am-7:00pm
  • Thu 10:00am-7:00pm
  • Fri 10:00am-7:00pm
  • Sat Closed
  • Sun Closed

Work and Education

Psychotherapist in Private Practice, 1997 - Present

Hunter College School of Social Work, MSW, 1994

Hope College, BA in Psychology, 1987