Built for the NHA CPT, ASCP PBT, and AMT RPT exams
Phlebotomy exam prep with answers you can check.
Explanations cite the CLSI, OSHA and CDC references they draw on, so you are not left guessing which answer key is right. Practice adapts to what you get wrong, follows your exam's blueprint, and gives you a readiness score for every domain.
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A phlebotomist fills three microcollection tubes from one fingerstick: a lavender EDTA, a green heparin, and a red serum tube. Which tube should be filled first?

AnswerThe lavender EDTA tube.
CLSI GP42 sets a different order for capillary collection than for venipuncture: blood gases, then EDTA, then other additive tubes, then serum. Platelets start clumping at a skin puncture right away, so the hematology (EDTA) specimen is filled first to avoid microclots and falsely low platelet counts.
[1] CLSI GP42 — capillary collection, order of fill
The free test's questions were checked against CLSI, OSHA, CDC and The Joint Commission guidance. Try all 30, no signup
How PhlebBot is different
Three things students say go wrong with phlebotomy practice banks, and what PhlebBot does instead.
The complaint: The practice questions were nothing like the real exam.
Scenario questions, weighted to your exam
After a short recall baseline, practice moves to “what would you do if…” clinical scenarios, and every topic is weighted to the NHA CPT, ASCP PBT or AMT RPT blueprint you choose, so safety and patient care get the share of your time the exam gives them.
The complaint: Two apps give two different answers, and nobody says which one is right.
Explanations that show their source
Explanations cite the CLSI, OSHA or CDC reference passage they draw on, and you can open that passage in the reference library. When no reference is found, the reply is flagged as unverified instead of sounding sure.
The complaint: Once the practice test is submitted, the questions you missed are gone.
What you miss comes back
Miss a concept and it returns as a new question a few items later, then again on later study days, until you answer it right. Your history is saved across sessions.
What a training session looks like

Orders: CBC, PT/INR, and a basic metabolic panel. You have a lavender, a light blue, and a gold SST on the tray. Which tube do you fill first?
Lavender, the CBC is the most important test.

Not quite. Light blue first. The coagulation tube is drawn before serum and EDTA tubes so additive carry-over cannot alter the PT/INR. Here the order is light blue, then gold SST, then lavender.
Reference: CLSI PRE02-Ed8, order of draw
Order of draw is now marked as a weak spot. It comes back in later sessions until you show you have it.
Who built PhlebBot
Benjamin Tibbs
Creator & developer
“While training in phlebotomy, I noticed a gap between how students are taught and what actually determines success in real clinical settings.”
An operations and analytics professional with over a decade of experience building systems that reduce error, he built PhlebBot to give students structured practice thinking through real scenarios, with answers that cite their references.
What a session gives you
Exam-weighted practice
Questions follow your exam's blueprint, so your study time goes where the points are, not evenly across topics you already know.
Explanations you can check
Answers come with references from CLSI, OSHA, and CDC documents so you can read the source yourself. Safety-critical topics show where the rule comes from.
Readiness by domain
A readiness score for every domain of your exam, and timed mock exams in your exam's format, so you can see which areas still need work.
How it works
Create an account and subscribe
Google or an emailed link, then secure checkout. $30 for 3 months or $15/month, charged at checkout. Pay with card, Cash App Pay, or Link. Cancel anytime.
Start training right away
The instructor AI is included: up to 60 tutoring turns a day on our Google Gemini key, nothing to install or set up. Your own key is optional for unlimited turns.
Train, get corrected, repeat
Your tutor asks, you answer, it explains with a reference and tracks what you missed. Weak domains come back until they stick.
Choose your certification path
PhlebBot adapts to your target exam. Pick your certification to see what it covers.
Not sure which exam to take? Compare all three certifications
Free phlebotomy study resources
Guides and practice materials you can use today, no account needed.
- Free Phlebotomy Practice Test30 exam-style questions with answers, explanations and your score
- NHA CPT Practice Test30 free questions weighted to the NHA CPT blueprint
- ASCP PBT Practice Test30 free clinical-reasoning questions for the ASCP PBT
- AMT RPT Practice Test30 free questions across the AMT RPT domains
- Order of Draw GuideComplete tube order with CLSI references and memory aids
- Study GuideReview of every phlebotomy exam topic
- Certification GuideNHA, ASCP, and AMT exam requirements and tips
- NHA CPT Exam PrepTargeted prep for the NHA Certified Phlebotomy Technician exam
- ASCP PBT Exam PrepTargeted prep for the ASCP Phlebotomy Technician exam
- AMT RPT Exam PrepTargeted prep for the AMT Registered Phlebotomy Technician exam
- Online ClassesAccredited phlebotomy programs and training options
Frequently asked questions
What phlebotomy students ask before they start studying with PhlebBot.
How do I study for the phlebotomy certification exam?
Phlebotomy certification exams — whether the NHA CPT, ASCP PBT, or AMT RPT — test clinical reasoning, not just memorization. The most effective way to prepare is to practice with realistic scenarios, identify your weak areas early, and focus your study time there. PhlebBot works like a personal tutor — it adapts to your knowledge level, tracks your progress across every domain of your target exam, and keeps pushing you on the topics you struggle with until you truly understand them.
I keep forgetting what I study — how do I actually retain phlebotomy material?
Cramming and re-reading notes are the least effective study methods. Retention comes from active recall — being asked questions and having to retrieve answers from memory. PhlebBot uses adaptive repetition: it revisits topics you've gotten wrong and spaces out review of topics you've mastered. Over time, the material sticks because you're practicing retrieval, not passive review.
Is PhlebBot better than flashcards or question banks?
Flashcards are great for raw memorization, but phlebotomy exams test your ability to think through clinical situations — not just recall facts. Question banks give you a score but don't tell you why you got something wrong or what to study next. PhlebBot combines both: it drills you on the facts and walks you through the reasoning, then adapts to focus on your specific weak spots instead of making you repeat what you already know.
I'm nervous about starting my externship — will this help me feel prepared?
That's exactly why PhlebBot exists. It was built by a phlebotomy student who felt the gap between classroom learning and real clinical work. PhlebBot walks you through the same situations you'll face during externship — patient identification, selecting the right equipment, handling difficult draws, and knowing what to do when something goes wrong. The goal is to build your confidence through practice so the clinical setting feels familiar, not overwhelming.
What topics does PhlebBot cover?
PhlebBot covers the full phlebotomy curriculum aligned with the National Healthcareer Association (NHA CPT), American Society for Clinical Pathology (ASCP PBT), and American Medical Technologists (AMT RPT) exam blueprints: venipuncture technique, patient identification, infection control and PPE, order of draw, specimen labeling and transport, tube selection and additives, needle safety, preanalytical errors, capillary collection, special populations (pediatric, geriatric), anatomy, medical terminology, and clinical scenarios. It tracks your competency in each area individually so nothing falls through the cracks.
How is PhlebBot different from YouTube videos or textbook study guides?
Videos and textbooks teach you the material, but they can't tell you what you don't know. PhlebBot is interactive — it asks you questions, evaluates your answers, corrects mistakes with clinical explanations, and remembers what you've struggled with across sessions. It's the difference between reading about phlebotomy and actually being quizzed by an instructor who knows your strengths and weaknesses.
What do I need besides the subscription?
Nothing. The instructor AI is included (Google Gemini on our key, up to 60 tutoring turns a day), so you can start the moment checkout completes. If you want unlimited turns or a different model, you can connect your own Google, OpenAI, Anthropic, DeepSeek, or Groq key in Settings; that provider then bills you directly, typically $1–5 a month.
Find out what you would miss before the exam does.
Exam Pass: $30 for 3 months. We email you 7 days before it renews at $15/month. Cancel anytime in Settings — 2 clicks.
Or Monthly at $15/month. Charged at checkout; pay with card, Cash App Pay, or Link.