Clinical Certification

Developed in association with
The National Association of State
Directors of Developmental Disabilities Services (NASDDDS)

NADD developed the NADD Competency-Based IDD/MI Dual Diagnosis Clinical Certification Program to improve the quality and effectiveness of services provided to individuals with a dual diagnosis through the development of competency-based professional standards and through promoting ongoing professional development. 

Clinical certification through NADD validates and provides assurance to people receiving services, professional colleagues, employers, and third-party payers that a clinician has met the standards established by NADD for providing services to individuals with IDD/MI. Certification attests to the clinician’s competency in providing these services.  

Clinicians who receive NADD certification will be entitled to use “NADD-CC” as a credential.  

A Clinician in the field of dual diagnosis is defined as an individual who provides clinical supports or services for persons with intellectual/developmental disabilities and mental health needs.

Sign Up Now

  1. Establish NADD Membership
    If you’re already a NADD member, skip to Step 2.

    If not, NADD Membership is a requirement for certification, and all employees of organizations with a NADD Organizational Membership receive member benefits through their employer.

    Click Here to Join!
  2. Complete your Certification Application
    Click here to login to your member portal.
    Select “Certifications”
    Select the Clinical Certification option.
  3. Recertification
    Renewing your NADD Certification is done within the member portal.


Program Overview
Executive Summary
Program Manual
Competency areas
Learn more about Clinical Certification:

Organizations with multiple staff to certify: m