What is code 90834?
The American Medical Association (AMA) defines and maintains CPT codes for psychotherapy services, which are regularly updated to reflect current clinical practice and innovation in mental health care.
CPT 90834 is the billing code for a 45-minute individual psychotherapy session with a patient. Mental health professionals use it to document and charge for sessions focused on improving emotional, behavioral, or mental health issues. The service is different from group therapy, as it is conducted individually and typically includes ongoing assessment, therapeutic interventions, and treatment planning. CPT 90834 is one of the most commonly used codes for standard outpatient therapy sessions.
In addition to basic psychotherapy codes, there are add-on codes that help capture services requiring more detailed documentation. One such add-on code is the interactive complexity code, which is used when therapy sessions involve increased communication challenges, such as multiple participants or other complicating factors that affect the treatment process. These codes are critical when providing medical evaluation and ensuring the medical necessity of the treatment.
Insurance payers rely on these codes to assess the medical necessity and appropriateness of treatments provided, ensuring that psychotherapy services meet established reimbursement criteria. Proper coding is crucial for mental health professionals to receive compensation for their work and to ensure that their services are appropriately documented for medical evaluation.






