100+ Free CMD Practice Questions
Pass your Certified Medical Dosimetrist (CMD) exam on the first try — instant access, no signup required.
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Key Facts: CMD Exam
175
Exam Questions (150 scored)
MDCB content specifications
3h 30m
Exam Time
MDCB exam information
$450
Exam Fee
MDCB exam information
5 years
Certification Cycle
MDCB certification maintenance
70-75%
First-Time Pass Rate
MDCB published data
MDCB administers the CMD certification exam with 175 multiple-choice questions (150 scored, 25 pilot) in 3 hours 30 minutes. The exam fee is $450. MDCB uses criterion-referenced scoring. CMD certification is valid for 5 years with continuing education requirements. BLS reports strong demand for radiation therapy professionals.
About the CMD Exam
The CMD exam certifies medical dosimetrists in radiation treatment planning, dose calculations, brachytherapy, IMRT/VMAT, radiation physics, quality assurance, and image-guided radiation therapy. The MDCB exam is administered at Pearson VUE test centers nationwide.
Questions
100 scored questions
Time Limit
3 hours 30 minutes
Passing Score
Scaled score (criterion-referenced)
Exam Fee
$450 (Medical Dosimetrist Certification Board (MDCB) / Pearson VUE)
CMD Exam Content Outline
Treatment Planning
External beam planning, IMRT/VMAT optimization, field design, dose constraints, and plan evaluation
Dose Calculations
Monitor unit calculations, dosimetric quantities, heterogeneity corrections, and BED/EQD2 concepts
Brachytherapy
HDR/LDR planning, TG-43 formalism, source selection, and intracavitary/interstitial techniques
Radiation Physics
Photon/electron interactions, beam characteristics, radiobiology, and beam generation
Quality Assurance
TG-51/TG-142, IMRT QA, IGRT, safety systems, and calibration procedures
How to Pass the CMD Exam
What You Need to Know
- Passing score: Scaled score (criterion-referenced)
- Exam length: 100 questions
- Time limit: 3 hours 30 minutes
- Exam fee: $450
Keys to Passing
- Complete 500+ practice questions
- Score 80%+ consistently before scheduling
- Focus on highest-weighted sections
- Use our AI tutor for tough concepts
CMD Study Tips from Top Performers
Frequently Asked Questions
How many questions are on the CMD exam?
The MDCB CMD exam consists of 175 multiple-choice questions (150 scored and 25 unscored pilot questions) with a time limit of 3 hours and 30 minutes.
What score do I need to pass the CMD exam?
The CMD exam uses criterion-referenced scoring. MDCB determines the passing standard through a psychometric process rather than a fixed percentage or raw score.
What topics are tested on the CMD exam?
The CMD exam covers treatment planning (30-35%), radiation physics, dose calculations, brachytherapy, quality assurance, and professional responsibilities as outlined in the MDCB content specifications.
How much does the CMD exam cost?
The MDCB CMD examination fee is $450. This fee is payable upon application and covers one exam attempt.
How should I study for the CMD exam?
Focus on treatment planning and dose calculations first (highest weight), then brachytherapy and physics. Use TG reports (TG-43, TG-51, TG-142) as key references. Practice monitor unit calculations and plan evaluation under timed conditions.
What are the eligibility requirements for the CMD exam?
Candidates typically need a bachelor's degree plus completion of an accredited medical dosimetry program or equivalent clinical experience. Check the MDCB website for current eligibility routes and documentation requirements.