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What clinicians are saying about National Sex Therapy Institute training:

“Becoming a Certified Sex Therapist has taken my career to the next level. Clients do their research. They know that when they come to see me, they will have a Sex Therapist who is competent and confident.”

become a sex therapist

National Sex Therapy Institute is dedicated to providing accessible, quality sex therapy training to mental health and medical professionals, increasing competency, marketability and the ability to expand the scope of their practice. We are dedicated to providing quality education based on real trends, case studies and current sexual issues in society that gives students real life (practical) skills in an experiential and interactive learning environment. Our courses are taught by contemporary instructors with a fresh perspective and current understanding of today’s sexual issues. 


Enhanced ability to address and discuss sexual concerns with clients resulting in the ability to attract a broader clientele and provide more thorough services to new and existing clients. 


Improved personal relationships, confidence, and quality of lives by reducing the stress of sexual concerns and providing clients with a confidential place to talk about the most sensitive and intimate subject matter. Certification will help clients feels secure, comfortable, and confident that the therapist they choose has the skill set to meet their needs. 


  • All applicants must hold or be in the process of obtaining at least a Master’s degree in a mental health-related field
  • All graduates of the program  must hold at least an intern-level license in a mental health-related field





Each class is 8 hours/CEUs. 

60 hours of coursework in Human Sexuality Education and 60 hours of coursework in Sex Therapy Training. 

These include: 

History of Sexology** 

Sexual and Reproductive Anatomy and Physiology 

Theories and Methods of Sex-Related Psychotherapy 

Dynamics of Interpersonal Relationships 

Sexual Orientation and Gender Identities 

Sexually Transmitted Infections and Safer Sex Practices 

Sexual Abuse 

Substance Abuse and Sexuality 


Atypical Sexual Behavior 

Sexual Dysfunctions 

Medical Factors That May Influence Sexuality 

Marital Partnering and Family Dynamics 

Sex-related Assessment and Diagnosis of Psychosexual Disorders 

Intervention in Relationships with Sex/Intimacy Problems 

Approaches to Medical Intervention in Treatment of Psychosexual Disorders and Sex Research 


Individual Supervision is offered by approved Sex Therapy Supervisors online and live where available. NSTI will provide and facilitate the submission of supervision contracts to all applicable professional organizations. Group Supervision is offered by approved Sex Therapy Supervisors online and live where available and is held in 4-hour blocks. Limited to 4 participants per group session. Group supervision may only count toward a maximum of 50% of the 50 hours required for certification. Supervision must take place over the course of at least 12 months and no more than 24 months. 


250 direct hours required for certification. Must be completed in a minimum of 12 months under supervision by an approved supervisor. 


This 1.5-day class is meant to help challenge and reshape your current belief system regarding your own sexuality and the sexuality of your potential clients. There are 12 CEUs awarded for this workshop. 

Have questions? Want to know details about the Sex Therapy Certification Program? Want to chat with our team and others like you who are interested in getting into the Sex Therapy field? Speak to graduates of the program about what it is like to be a TSTI-Certified Sex Therapist.

The next VIRTUAL information session will be TBD 

Please RSVP to nstiprogramassistant@gmail.com 

Program Calendar



Program Registration Deadline: July 1, 2023

Enrollment Agreement and Deposit Due: July 15, 2023

2023 Class Dates: 

Fall 2023 Program Schedule:

August 1:
Class 1: (async) History of Sexology
Class 2: (async) Anatomy
Sept 15-16th: 
Class 3: Theories
Class 4. Atypical Sexual Behavior
October 1:
Class 5: (async) STDs and STIs
Oct 20-21: 
Class 6. Orientation/Gender
Class 7. Problematic Hypersexuality
November 1: 
Class 8: (async) Low-Desire
Class 9: (async) Sexual Dysfunctions
Nov 17-18:
Class 10. Sexual Assault and Abuse
Class 11. Medical Factors
December 1:
Class 12: (async) Collaboration/Consultation/Referral
Class 13: (async) Interpersonal Dynamics and Love
Dec 8-9:
Class 14. Partnering and Family Dynamics / Poly
Class 15. Final Presentations


*Please Note: All courses are virtual – some self-paced, and some live lecture 

Each live class day is 9am-5pm CST

Tuition & Fees

All payments may be made via check (payable to National Sex Therapy Institute). Returned checks will incur a $25 fee. Unsettled accounts will result in withheld course credits/certificates of completion/supervision credits and be asked to leave the program.


Enrollment Deposit: $250


1 Payment: $5,750/ Due Class 1 

2 Payments: $2,875 (plus $25 installment fee)/Due Class 1 & 6 

SAR Workshop (12 CEUs Awarded): $525 

Students must remain current on tuition/supervision payments or risk being asked to leave the program and will not receive credits/certificates of completion until account is settled.

**Enrollment Deposit goes toward tuition amount. Payment plans are available upon request. 


Full payment: due upon registration $525

Open to NSTI students and other mental health professionals 12 CEUs offered.


Certification Registration Deadline: July 1, 2023

Enrollment Agreement and Deposit Due: July 15, 2023

SAR Workshop Information

REGISTER HERE  for the  Sexual Attitude Re-Assessment (SAR) Workshop

Aug 5-6, 2023

This is a 1.5-day Workshop for a total of 12 credit hours: ($525)

Texas LPCs, LMFTs, and LCSWs will receive 12 CEU credits.

What is a Basic SAR?

The Sexual Attitude Reassessment workshop (SAR) is a process-oriented, structured group experience to promote participants’ awareness of their attitudes and values related to sexuality, and to assist them in understanding how these attitudes and values affect them professionally and personally. Since the primary purpose of a SAR is the examination of attitudes and values, it is not a traditional academic experience designed to disseminate cognitive information, nor is it psychotherapy directed toward the resolution of personal problems.

Many individuals educate or counsel in the area of human sexuality or wish to be trained in the discipline. It is crucial that people who deal with issues of human sexuality be aware of their own attitudes and understand how they may impact their work. Certification is an important part of practicing in the field of sexuality, and candidates most often satisfy this requirement by participation in a Sexual Attitude Reassessment Seminar (SAR).

Workshop Design

The Basic SAR is an intensive workshop experience that gives participants an opportunity to examine their own values, beliefs and attitudes on various issues in sexuality. Topics to be explored include, but are not limited to, developmental sexuality; sexual myths; masturbation; heterosexual, gay, lesbian and bisexual relationships; transgender; alternative relationships; BDSM; disability and aging.


 Dr. Viviana Coles, DMFT, LMFT-S, CSTDirector/Founder/Instructor

Ashley “Elle” Mendoza-Staats, PhD, LMFT-S, CST-S -Supervisor 

Jennifer Reeves, MA, LMFT, CST -Supervisor 

Megan Pollock, MS, LPC-S, CST -Instructor/Supervisor

Andrea Morgan -Program Manager

Mailing Address: 1302 N. Shepherd Drive, 3rd Floor 

Houston, Texas 77008 

Phone: 800.913.9613 x5 

Email: NSTIProgramAssistant@gmail.com 

Website: www.BecomeASexTherapist.com