A collateral session in therapy is a meeting between your therapist and someone else in your life, such as a parent, spouse, or caregiver, where the focus remains entirely on your treatment goals. Unlike couples or family therapy, the other person isn’t there as a co-client. They’re there to support your progress, provide information, or learn how to better help you outside of sessions.
How a Collateral Session Works
In a standard therapy session, it’s just you and your therapist. In a collateral session, a third person joins, either alongside you or sometimes without you present, depending on the situation and what your therapist thinks will be most helpful. The defining feature is that the session exists to serve your treatment plan. Your therapist isn’t switching into a new role or treating the other person. Everything discussed is oriented around your goals, your symptoms, or your recovery.
Your therapist will typically get your written consent before reaching out to anyone. That consent covers who the collateral person is, what topics can be discussed, and what information can or cannot be shared. In child and adolescent therapy, a collateral session might involve a parent learning strategies to reinforce what the child is working on. In adult treatment, it could be a spouse learning how to respond during a panic attack or a caregiver getting guidance on supporting someone through addiction recovery.
Who Can Be a Collateral Contact
The term “collateral” is broad. It can refer to family members, romantic partners, close friends, teachers, school counselors, other healthcare providers, or anyone who plays a meaningful role in your life and treatment. In children’s therapy, teachers and school nurses are common collateral contacts because they observe the child in a different environment and can confirm or add to what the therapist is seeing. For adults in substance use treatment, family members often participate in collateral sessions to provide social support and help motivate their loved one to stay in treatment.
Other therapists, case managers, or doctors involved in your care can also serve as collateral contacts. In these cases, the session is more about care coordination: making sure everyone on your treatment team is working from the same playbook.
Collateral Sessions vs. Family Therapy
This distinction trips people up, but it matters for both clinical and billing purposes. Family therapy uses a systemic framework, meaning the therapist is looking at the relationships and interactions between multiple family members. Everyone in the room is part of the therapeutic focus. The family system itself is, in a sense, the client.
A collateral session is different. There’s one identified client, and the other person is there in a supporting role. If your spouse joins a session to learn about your depression and how to help at home, that’s collateral. If you and your spouse are both working on communication patterns that affect your relationship, that’s couples therapy. The line can feel blurry in practice, but the therapist’s treatment plan will reflect which type of session it is, and insurance companies distinguish between the two.
Confidentiality in Collateral Sessions
Confidentiality gets more complicated when a third person enters the picture. The core principle is that the therapist’s primary obligation is to you, the client. A collateral participant does not become a patient and does not have the same doctor-patient relationship with your therapist.
The American Psychiatric Association has clarified that therapists cannot guarantee confidentiality to collateral sources. If a family member shares information during a collateral session, the therapist should explain upfront that this information could potentially be shared with the client. The therapist’s ethical duty to be honest with their patient takes priority over protecting what the collateral person disclosed. Safety concerns, in particular, override any expectations of confidentiality from the collateral source.
That said, therapists use clinical judgment. If a family member provides background information and requests privacy, the therapist may choose not to include specific identifying details in the medical record, especially since patients can review their own records. But this is a discretionary choice, not a guarantee. If you’re the collateral person attending someone else’s therapy session, expect the therapist to be transparent about these limits before the conversation begins.
What Gets Documented
Collateral sessions are recorded in the primary client’s chart, not in a separate file for the collateral person. The therapist’s progress note will include the name of the person who participated, their relationship to the client, and what was discussed in relation to the treatment plan. If collateral contacts are involved in developing or updating the treatment plan, their names and roles are specifically identified in that plan as part of the broader care team.
When children are the primary client, agencies sometimes put privacy safeguards in place. If a family doesn’t want every detail shared across all providers involved in the child’s care, the treatment team can create what’s essentially a firewall within the record. This protects the family’s confidentiality preferences while still allowing for coordinated treatment.
When Collateral Sessions Are Most Useful
Collateral sessions tend to come up in a few common scenarios. In child and adolescent therapy, they’re almost routine. A therapist working with a 10-year-old on anxiety might bring in the parents to explain what avoidance behaviors look like at home and teach them how to respond without accidentally reinforcing the anxiety. The child remains the client, but the parents become active participants in the treatment strategy.
In substance use treatment, collateral sessions help family members understand the recovery process, set healthy boundaries, and recognize warning signs of relapse. In trauma work, a therapist might meet with a partner to explain trauma responses so the partner doesn’t misinterpret certain behaviors. In cases involving older adults or people with cognitive challenges, a caregiver collateral session can help the therapist understand what’s happening between appointments.
Potential Concerns to Keep in Mind
Bringing someone else into your therapy space changes the dynamic. Some clients worry that the therapist will “take sides” or that private details will be revealed. A good therapist will discuss these concerns with you before scheduling a collateral session and will clarify exactly what will and won’t be shared. You have the right to set boundaries on what topics are on the table.
There’s also the risk of the collateral person trying to redirect the session toward their own concerns or grievances. Because this isn’t family therapy, the therapist will steer the conversation back to your treatment goals. If it becomes clear that the collateral person has their own therapeutic needs, your therapist will likely suggest they seek their own provider rather than expanding the scope of your sessions.
Collateral sessions work best when everyone understands their role going in: one client, one treatment plan, and a shared goal of supporting that client’s progress.