Mark  Colterjohn

Mark Colterjohn


Licensed Clinical Social Worker, LCSW Specialties Insurance & Fees Locations
New York Accepting Online
Flatiron District Accepting In-person

Updated January 14, 2024

Specialties & Expertise

  • Depression
  • Trauma
  • Anxiety
  • Substance use
  • Self-esteem
  • LGBTQIA, gender, and sexuality topics

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 Internal Family Systems (IFS), Gestalt Therapy, and EMDR. 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 at 21st Street near 5th avenue.

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

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

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

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

LGBTQIA, gender, and sexuality topics - Exploring topics of sexuality, gender, and identity; coping with discrimination and oppression; navigating relationship, family, and cultural challenges


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


  • Aetna
  • Medicare

Mark Colterjohn is accepting clients using listed insurances, paying listed fees, or using health insurance out-of-network benefits other than:

  • Cigna

Out-of-pocket fees

  • Individual sessions: $250 (45min)
  • Sliding scale: $150 - $250
  • Initial session: $250 (45min)

Additional session information

Out-of-network billing options

This provider can support you in getting reimbursement from your insurance company if you are seeking out-of-network reimbursement. Here are the out-of-network billing options they provide:

  • Super billing
Payment options
  • Cash
  • Check
  • Credit Card
  • Debit Card
  • PayPal
  • Venmo
Session frequency

Frequency of sessions this provider offers to see clients once you are an established client.

  • Weekly
  • Multiple times a week
  • As needed


Flatiron District practice
37 w 26th st, Suite 1201, New York, New York 10010
Accepting new clients in-person
Currently Available Times
  • Morning (Before 10am)
  • Daytime (10am - 1pm)
  • Afternoon (1pm - 5pm)
  • Evening (After 5pm)
  • Weekends
Regular Hours
  • Mon 7:45am-7:00pm
  • Tue 7:45am-7:00pm
  • Wed 7:45am-7pm
  • Thu 7:45am-5:00pm
  • Fri 8:00am-6:00pm
  • Sat Closed
  • Sun Closed

Online Sessions (New York)
Accepting new clients online
Currently Available Times
  • Morning (Before 10am)
  • Daytime (10am - 1pm)
  • Afternoon (1pm - 5pm)
  • Evening (After 5pm)
  • Weekends
Regular Hours
  • Mon 7:45am-7:00pm
  • Tue 7:45am-7:00pm
  • Wed 7:45am-7:00pm
  • Thu 7:45am-5:00pm
  • Fri 8:00am-6:00pm
  • 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


New York: 070239