Matthew Sexton, LCSW — New York, Florida & Maine Telehealth
Therapy for Complex PTSD
What happened to you wasn't one event. It was a climate.
PTSD is built on a single event. Complex PTSD is built on years — repeated, prolonged, interpersonal trauma with no reliable exit. It requires a different framework, a different pace, and a clinician who has actually worked inside it.
Telehealth available in New York, Florida, and Maine
Clinical Definition
Complex Post-Traumatic Stress Disorder (ICD-11 6B41)
Complex PTSD is a condition arising from prolonged exposure to multiple or repeated traumatic events, particularly those involving interpersonal harm from which escape is difficult or impossible — such as childhood abuse, captivity, or long-term domestic violence. Distinguished from PTSD by three additional disturbances in self-organization: severe emotional dysregulation, a persistently negative self-concept, and profound interpersonal disturbance.
The DSM-5-TR does not yet recognize C-PTSD as a distinct diagnosis. The ICD-11 does. People with C-PTSD are frequently misdiagnosed with Borderline Personality Disorder, bipolar II, or treatment-resistant depression.
Common Signs of Complex PTSD
C-PTSD extends beyond classic PTSD into identity, relationship, and body — you may recognize several of these:
- ◆Emotional flooding or numbness that feels disproportionate to the present moment
- ◆Deep-seated shame, self-blame, or a core belief that you are fundamentally defective
- ◆Chronic difficulty trusting others or a pattern of relationships that repeat familiar harm
- ◆Dissociation, feeling unreal, or losing time without explanation
- ◆Chronic physical symptoms: pain, fatigue, GI issues, autoimmune flares
- ◆Flashbacks or body memories from events that happened years ago
- ◆A persistent sense that the past is still happening, even when you know it is not
Complex PTSD vs. PTSD at a Glance
| Feature | Complex PTSD (C-PTSD) | Classic PTSD |
|---|---|---|
| Cause | Prolonged, repeated relational trauma | Discrete traumatic event |
| Duration of original trauma | Months or years | Single or brief incident |
| Relationship to perpetrator | Often trusted caregiver or partner | Often stranger or external threat |
| Core symptom clusters | Re-experiencing + emotional dysregulation + negative self-concept + interpersonal disturbance | Re-experiencing, avoidance, hyperarousal, mood changes |
| Diagnostic recognition | ICD-11 code 6B41 (not in DSM-5-TR) | DSM-5-TR and ICD-11 |
| Recommended treatment | Herman's phase-based model | CPT, EMDR, or other single-incident protocols |
PTSD vs. Complex PTSD
A Different Kind of Wound
Classic PTSD is organized around a discrete traumatic event — a car accident, an assault, a combat deployment. There is a before and an after. The nervous system is responding to something that happened.
Complex PTSD is different. It is what happens when trauma is repeated and prolonged inside relationships you could not leave — childhood abuse or neglect, captivity, long-term domestic violence, prolonged caregiving for an unsafe person, prolonged combat. There is no clean before. The nervous system is responding to a climate, not a storm.
The DSM still does not formally recognize C-PTSD as a separate diagnosis. The ICD-11 does. In the absence of that diagnostic home, people with C-PTSD are routinely misdiagnosed — most often as borderline personality disorder, bipolar II, ADHD, or “treatment-resistant depression.” The treatment for those conditions rarely touches the actual injury.
“Complex PTSD is a developmental injury, not a personality defect. The work is not to fix who you are — it is to meet the parts of you that were never allowed to be anything else.”
How Complex PTSD Presents
The Clinical Picture
Drawing on Judith Herman's original six-cluster framework and the ICD-11 criteria, complex PTSD shows up across identity, affect, body, and relationship in ways general trauma therapy often misses.
Emotional Dysregulation
Chronic difficulty modulating affect — flooding, numbness, rage, despair that seem disproportionate to the current moment. Often mistaken for moodiness or instability when it is actually a nervous system shaped by sustained threat.
Negative Self-Concept
A persistent, organizing belief that you are defective, worthless, or fundamentally unlovable. Not low self-esteem in the ordinary sense — a core identity forged under conditions where being wrong or small was safer than being seen.
Interpersonal Disturbance
Difficulty trusting, a pull toward people who feel familiar but harmful, chronic fear of abandonment, or withdrawal from closeness altogether. Relationships feel dangerous even when they are not.
Dissociation & Fragmentation
Periods of feeling unreal, disconnected from the body, losing time, or experiencing conflicting internal states that feel like separate selves. A survival strategy that started as protection and became reflex.
Somatic Dysregulation
Chronic pain, fatigue, autoimmune flares, gut problems, migraines — the body carrying what the story could not hold. Trauma lives below the neck, and long trauma lives in the tissues.
Re-Experiencing & Hyperarousal
Intrusive memories, body flashbacks, nightmares, startle, scanning for threat, insomnia. The classic PTSD cluster still applies — it is simply layered on top of the relational and identity wounds.
Herman's Phase-Based Model
How Recovery Actually Unfolds
Safety & Stabilization
Herman's first phase. Before anything else, the nervous system has to learn that the present is not the past. We build grounding tools, establish daily regulation practices, work with sleep and somatic capacity, and map the internal landscape before opening any of it.
Processing the Trauma
Herman's second phase. Once stabilization is reliable, we work with the memories, the body states, and the parts of you that held what was happening. This is careful, titrated work — never flooding, never bypassing the window of tolerance.
Reconnection & Reintegration
Herman's third phase. Rebuilding a life that belongs to you — relationships, meaning, purpose, a sense of future. The goal is not to erase the past but to return you to a present where the past no longer runs the controls.
Nervous System & Parts Work
Running through all three phases: polyvagal-informed somatic regulation, attention to the body's threat responses, and parts-based work with the internal protectors that kept you alive. Complex trauma rewires the whole system — recovery has to meet it there.
Who This Practice Serves
People Living With Prolonged Trauma
Complex PTSD is not a niche condition. It is common — and commonly missed. This practice is built around the specific patterns and pace that prolonged trauma requires.
Common Questions
What People Ask Before Starting
Is C-PTSD actually in the DSM?
No. The DSM-5-TR still does not include Complex PTSD as a distinct diagnosis — it groups everything under PTSD. The ICD-11, which is the World Health Organization's diagnostic manual, does include C-PTSD as a separate condition with its own criteria (Cloitre and colleagues did the foundational work on those criteria). Most trauma clinicians who work with prolonged relational trauma use the ICD-11 framework clinically even when billing requires DSM codes.
How is C-PTSD different from Borderline Personality Disorder?
There is real overlap — emotional dysregulation, fear of abandonment, unstable self-concept, relationship difficulties — and a lot of people with C-PTSD get a BPD label. But the frame is different. BPD treats the symptoms as a personality structure. C-PTSD treats them as the predictable result of an injury. That distinction changes how the work is done and changes how a person is allowed to understand themselves. A developmental injury is not a character flaw.
How long does Complex PTSD recovery take?
Honest answer: longer than a 12-session protocol and shorter than forever. Herman's phase-based model is not a timeline — it is a sequence. Phase one (safety and stabilization) often takes months before trauma processing can begin responsibly. The full arc is usually measured in years, not weeks. That is not a failure of the work; it is the nature of a wound that took years to form.
Will I always be this way?
No. Your nervous system is not fixed, your self-concept is not fixed, and the meaning you make of what happened is not fixed. Recovery is not about erasing the past — you will still carry what you carry. But the past stops running the controls. Symptoms soften. Relationships get safer. You get to live in the present more of the time. People do recover from this, and the clinical literature supports that clearly.
What if I don't remember everything that happened?
That is common and clinically expected. Memory under prolonged trauma is fragmented by design — the nervous system stores what it can hold. You do not need a complete narrative to begin this work. We start with what is present now: the body, the current nervous system, the current relationships. The memories that need to come forward will come forward when the system is ready to hold them.
Clinical Foundations
Where This Work Comes From
The clinical frame used here draws directly from the core literature on complex trauma — not pop psychology, not general CBT, and not couples work repurposed for trauma survivors.
- —Herman, J. L. (1992). Trauma and Recovery. The foundational text on complex PTSD and the phase-based recovery model.
- —van der Kolk, B. (2014). The Body Keeps the Score. Trauma, the body, and the limits of traditional talk therapy.
- —Porges, S. W. (2011). The Polyvagal Theory. The autonomic nervous system basis for trauma responses and somatic regulation.
- —Cloitre, M., et al. Empirical work establishing the ICD-11 Complex PTSD criteria and distinguishing C-PTSD from PTSD and BPD.
- —Courtois, C. A., & Ford, J. D. (2009). Treating Complex Traumatic Stress Disorders. Comprehensive clinical guide to phase-based complex trauma treatment.
- —Fisher, J. (2017). Healing the Fragmented Selves of Trauma Survivors. Parts-based clinical work with complex trauma.
Your Therapist
Matthew Sexton, LCSW
Complex Trauma & Relational Trauma Specialist
Matthew Sexton is a Licensed Clinical Social Worker in private practice with a clinical focus on complex trauma, developmental injury, and the psychological aftermath of prolonged relational harm. His work draws on Herman's phase-based model, polyvagal-informed somatic regulation, and parts-based approaches to internal fragmentation.
Sessions are available via telehealth in New York, Florida, and Maine. Private pay only — $225/session with SuperBill provided for out-of-network reimbursement.
Getting Started
Begin Your Recovery
Reach Out
Use the contact form or send a direct message. Matthew responds personally — no intake coordinators, no answering services.
Free Consultation
A 15-minute call to understand what you are carrying, answer your questions, and confirm this is the right fit before committing to anything.
Begin the Work
Telehealth sessions via secure video. Weekly to start, with phase-based pacing. $225/session — SuperBill provided for out-of-network reimbursement.
Common Questions
Frequently Asked Questions
What is the difference between PTSD and Complex PTSD?+
PTSD typically arises from a discrete traumatic event and is characterized by re-experiencing, avoidance, hyperarousal, and mood changes. Complex PTSD (ICD-11 code 6B41) shares those features but adds three additional clusters unique to prolonged relational trauma: severe emotional dysregulation, deeply negative self-concept (pervasive shame and worthlessness), and profound interpersonal disturbance. C-PTSD develops from sustained exposure rather than a single event and requires a different clinical approach.
What treatment approaches work for Complex PTSD?+
The most evidence-based framework is Judith Herman's three-phase model: Safety and Stabilization first (building nervous system capacity before processing), Trauma Processing (titrated, window-of-tolerance-based work with traumatic material), and Reconnection and Reintegration (rebuilding a life no longer organized around survival). Somatic approaches, parts-based work, and ACT are frequently integrated across all three phases.
How long does Complex PTSD recovery take?+
Recovery is typically measured in years rather than months — not because progress is slow, but because the scope of work is broad. Stabilization alone can take 6–12 months for complex presentations. Many clients see substantial functional improvement within 18–24 months of consistent phase-based work. Early progress markers — better emotional regulation, more stable sleep, reduced flashback frequency — typically emerge before the trauma narrative work begins.
Mental Wealth Solutions provides individual psychotherapy and mental health consulting. This page is for informational purposes and does not constitute medical advice. Matthew Sexton, LCSW is licensed in New York, Florida, and Maine. Telehealth services are provided to clients located in those states at the time of service.