CPT 90846: therapy about the client, without the client
90846 is family psychotherapy conducted without the identified patient present. It is the most misunderstood code in outpatient behavioral health — routinely confused with a collateral contact, routinely under-used for parent work that genuinely qualifies, and routinely denied when the note does not make clear it was therapy.
90846 covers family psychotherapy without the patient present, descriptor time 50 minutes, with most payers expecting at least 26 minutes. Structurally it is the sibling of 90847, differing only in whether the identified patient is in the room — but that difference changes both the clinical work and how the claim is read.
The distinction that matters most
90846 is psychotherapy. It is not a phone call, a check-in, a coordination conversation, or a status update to a parent. It is a therapeutic session in which family members are the participants and the therapeutic work is directed at the identified patient's treatment.
This is where most denials originate. A twenty-minute call to a parent about scheduling and general progress is a collateral contact, and collateral contacts are frequently not separately billable. A fifty-minute session in which a clinician works with parents on the family patterns maintaining a child's symptoms is family psychotherapy, and it is 90846.
The difference is visible in the note. One records information exchanged. The other records an intervention delivered.
When 90846 is genuinely the right code
- Parent work in child and adolescent treatment. Substantial parts of effective treatment for younger children happen with parents rather than the child — behavioural management, co-parenting consistency, changing responses that maintain symptoms.
- Preparation for conjoint work. Meeting with family members to prepare for a session the identified patient will join, particularly where relational safety is a concern.
- Psychoeducation as intervention. Working with family members on how to respond to a client's condition — helping a partner stop accommodating compulsions, for example — is a therapeutic intervention with an evidence base, not information-giving.
- Where the client cannot participate but family work is still indicated.
Under-use is the bigger problem. Many practices doing substantial parent work bill none of it, either because they are unaware 90846 exists or because they assume anything without the client present is unbillable. That is a real revenue loss for real clinical work — and, more importantly, it produces a chart that does not reflect the treatment delivered.
Why it gets denied
- It reads as a collateral contact. The note records what was discussed rather than what was done. Fixed by documenting the intervention.
- No link to the patient's treatment plan. The service is billed under the identified patient's benefits, so it must advance their goals. A note about family dynamics that never connects to the client's plan is exposed — see the golden thread.
- Plan exclusion. Some plans exclude services delivered without the patient present, regardless of clinical merit.
- Frequency. A pattern of 90846 with little or no direct treatment of the identified patient invites the question of who is actually being treated.
- Duration below threshold. Short contacts fall outside the code.
Documentation
Because 90846 is the code most likely to be read as something else, the note carries more weight than usual. It should make three things unmissable:
- Who attended and why the identified patient was absent. One clause is enough — clinically indicated, developmentally appropriate, preparatory.
- The therapeutic intervention. Not "discussed Jamie's progress" but "coached parents in differential attention; rehearsed responses to bedtime refusal that withdraw reinforcement from escalation."
- The connection to the identified patient's treatment plan goal, named.
Session duration, participants by role, and the plan for next steps complete it.
Same-day billing
Practices frequently ask whether a parent session and a child session on the same day can both be billed. Sometimes, but it is payer-specific and often restricted. Where both genuinely occurred as distinct services, document them as distinct sessions with their own durations and interventions, and confirm the policy before assuming. Splitting one session into two claims is a different thing entirely and is straightforwardly improper.
Adjacent codes
- 90847 — conjoint family therapy with the patient present.
90849— multiple-family group psychotherapy.- 90834 — individual therapy with the identified patient.
What Weft does with this
Weft treats collateral work as part of the record rather than something that happens in your inbox. Participants are tracked per session, family sessions are written against the identified patient's active plan goals, and the distinction between a coordination contact and a therapeutic session is explicit in the note structure — which is exactly the distinction a reviewer is looking for.
Confidentiality when the client is not there
90846 raises a confidentiality problem the other codes do not, and it deserves handling before the first session rather than during it.
For an adult client, meeting with family members about their care requires authorisation, and the scope of what may be disclosed should be explicit. "The client consented to family involvement" is not the same as "the client consented to disclosure of their trauma history to their mother." Family sessions frequently surface material the client would not have chosen to share, and the clinician holds that boundary.
For minors, the picture differs by state and by service type. Parental involvement is generally contemplated and often required, but many states grant minors independent consent rights for certain services — commonly substance use treatment, sometimes mental health treatment above a specified age — and in those areas the minor's confidentiality may attach even against a parent. Substance use records carry additional federal protection.
The practical rule: decide what will and will not be shared before the session, say so to everyone in the room at the start, and document that you did.
Frequency patterns that draw questions
A pattern worth watching in your own data: the ratio of 90846 to direct treatment of the identified patient.
Parent-only work is entirely legitimate and sometimes the majority of effective treatment for a young child. But a chart showing twenty 90846 sessions and two sessions with the child invites a reasonable question about who the patient is — and the answer needs to be in the record, not supplied afterwards.
Where parent work genuinely dominates, say why: developmental stage, the evidence base for parent-mediated intervention in this presentation, the child's tolerance for direct work. One sentence in the treatment plan converts an anomaly into a documented clinical strategy.
Whose benefits are billed
A recurring confusion: 90846 is billed under the identified patient's benefits, not under the attending family member's, even though the patient was not in the room.
This surprises people, and it has consequences. If a child is the identified patient, the session is billed to the child's plan and appears on the child's claims history and any explanation of benefits sent to the policyholder. Where parents are separated and one holds the policy, that has confidentiality implications worth anticipating rather than discovering.
It also means the attending family member's own coverage is irrelevant to the claim. A parent with no insurance does not prevent a billable 90846, because they are not the patient — they are participants in the patient's treatment.
When the identified patient objects
A situation that arises more than the coding literature acknowledges: family members request a session and the client does not want it to happen.
For a competent adult client this is generally decisive — you cannot deliver treatment under their benefits, in their chart, against their wishes, and doing so is a clinical and ethical problem before it is a billing one. For minors the calculus differs, but a child's objection is still clinically significant information rather than an obstacle to route around.
Where family members need support that the client will not sanction, the honest answer is a referral for their own treatment, in their own record, under their own benefits.
Verified 29 July 2026 against AMA CPT descriptors and CMS published guidance. Code definitions are national; coverage, reimbursement and documentation expectations are set by individual payers and vary by plan, state and contract. Primary references: AMA CPT; CMS Physician Fee Schedule; APA Services. This page is billing reference, not legal or coding advice.