TRI provides individual and group psychotherapy for trauma survivors on an outpatient basis. It also provides group psychotherapy for trauma survivors in its Partial Hospitalization Program (PHP). The PHP is accredited by The Joint Commission.

The treatment at TRI is not specific to any one type of mental disorder or addiction; rather it aims to treat the source of the problem, trauma.

Learn more about why you should choose TRI for treatment.


To learn more about our precautions and procedures for Covid-19, and to watch our video, please visit our Covid-19 Statement page.

Receiving Treatment

If you are interested in referring a client to TRI, or if you are a client seeking therapy, please contact TRI at:

Cedar Park Office

(737) 228-0538

700 Market Street, #105
Cedar Park, TX 78613

Richardson Office

(214) 738-3645

1701 Gateway Blvd., Suite 359
Richardson, TX 75080

To read the first two pages of the information packet for new patients at TRI, click below. The full packet is 16 pages and will be provided on admission to the Program.

Download New Patient Packet

TRI is in-network with a number of different insurance companies, including BCBS, Optum/United Healthcare, Aetna, Magellan with Cigna, Tricare, and Medicare (pending). TRI is often able to make out-of-network or single case agreements with different insurance companies. You can also pay cash. Please contact us about self pay options.

TRI is unable to accept scholarship clients at this time.

Clients receiving treatment at TRI usually receive their medications from outside psychiatric providers or physicians. However, TRI contracts with a psychiatrist to do psychiatric evaluations, medication management, and weekly rounds.

Trauma can result from many different experiences during childhood, including:

  • physical, sexual, verbal and emotional abuse
  • emotional and physical neglect
  • early loss of caretakers
  • bullying
  • domestic violence
  • highly dysfunctional family dynamics
  • prolonged medical and surgical treatments

Later in adolescence and adulthood it can include:

  • sexual or physical assaults
  • loss and bereavement
  • accidents and natural disasters
  • combat
  • many other experiences

Severe trauma can produce many different mental disorders, and lead to addictions and self-defeating behaviors, including:

  • PTSD
  • dissociative disorders
  • depression
  • anxiety
  • substance abuse
  • borderline personality disorder
  • eating disorders; lack of meaningful relationships
  • lack of self- esteem
  • other problems

The individual and group psychotherapy provided by TRI is based on Dr. Ross's Trauma Model Therapy [Ross, C.A., Halpern, N. (2009). Trauma Model Therapy: A Treatment Approach for Trauma, Dissociation, and Complex Comorbidity. Richardson, TX: Manitou Communications].

Medication Prescribing

  • The focus at TRI is on psychotherapy.
  • TRI expects you to obtain your prescriptions from your primary care physician, physician assistant or psychiatrist.
  • TRI will not start anyone on a benzodiazepine, stimulant or narcotic.
  • TRI does not provide detox or long term opiate maintenance.
  • TRI does not manage withdrawal from medications - this takes longer than the time you will be in the Program.

Treatment Outcome Studies

Dr. Ross has published a series of treatment outcome studies documenting the effectiveness of the model.

Reductions in symptomatology from admission to discharge at a residential treatment center for substance abuse disorders: A replication study.
Ross, C.A., Engle, M., Edmonson, J., Garcia, A.
Psychological Disorders and Research, doi: 10.31487/j.PDR22020.03.01 (2020)

Reductions in symptomatology at a residential treatment center for substance use disorders.
Ross, C.A., Engle, M.C., Baker, B.
Journal of Aggression, Maltreatment, and Trauma, 10, 1173-1180 (2019)

Treatment outcomes across ten-months of combined inpatient and outpatient treatment in a traumatized and dissociative patient group.
Ross, C.A., Goode, C., Schroeder, E.
Frontiers in the Psychotherapy of Trauma and Dissociation, 1(2), 87-100 (2018)

Acute stabilization in a trauma program.
Ross, C.A., Burns, S.
Journal of Psychological Trauma, 6, 21-28 (2007)

A proposed trial of dialectical behavior therapy and trauma model therapy.
Ross, C.A.
Psychological Reports, 96, 901-911 (2005)

Acute stabilization and three-month follow-up in a trauma program.
Ross, C.A., Haley, C.
Journal of Trauma and Dissociation, 5, 103-112 (2004)

Acute stabilization in an inpatient trauma program.
Ross, C.A., Ellason, J.W.
Journal of Trauma and Dissociation, 2, 83-87 (2001)

Two-year follow-up of inpatients with dissociative identity disorder.
Ellason, J.W., Ross, C.A.
American Journal of Psychiatry, 154, 832-839 (1997)

Millon clinical multi-axial inventory-II follow-up of patients with dissociative identity disorder.
Ellason, J.W., Ross, C.A., Fuchs, D.L.
Psychiatry, 59, 255-266 (1996)

For a list of all Dr. Ross's published papers and books, go to:

Trauma Therapy Treatment Books

For these and other titles, please visit the official Manitou Communications book store at