NBDE Part I (Legacy — discontinued 2021) (NBDE-I) Exam Blueprint

NBDE-I

400Questions
420 minDuration
Pass/Fail (Scaled score 49–99; passing score 75)Passing Score
Practice NBDE Part I (Legacy — discontinued 2021) on QuizForge

Exam Domains

1 anatomic sciences Weight not published
2 biochemistry and physiology Weight not published
3 microbiology and pathology Weight not published
4 dental anatomy and occlusion Weight not published

Exam Details

Question TypesMultiple Choice, Case-Based Multiple Choice
FormatLinear (computer-based at PSI testing centers)
Online ProctoringNot available
ID RequirementsGovernment-issued photo ID required. Name on ID must match registration exactly.
RenewalNot required -- INBDE and NBDHE scores do not expire under JCNDE/ADHA policy, but individual state dental boards may impose score age limits (commonly 5 years). Verify with the applicable state licensing board.
Retake Policy60-day waiting period between failed attempts. Maximum 3 attempts per calendar year for INBDE. Scores are generally valid for 5 years for most state licensure boards.

Official Study Resources

candidate guideINBDE Candidate Guide (free)
candidate guideNBDHE Candidate Guide (free)