The NHA Certified Phlebotomy Technician (CPT) is the most widely held phlebotomy certification in the United States. Hospitals, labs, doctor’s offices, and staffing agencies all recognize it. If you’ve finished a training program and you’re trying to figure out which exam to take, this is usually the right answer.
Here’s the complete US-focused guide: who can sit for it, what’s on it, what it costs, how to study, and a set of practice questions written in the same style the NHA uses.
Who can take the NHA CPT exam
You qualify if you meet all three of the following:
- You have a high school diploma or GED.
- You completed an approved phlebotomy training program within the last five years OR have at least one year of supervised work experience as a phlebotomist within the last three years.
- You have performed a minimum of 30 successful venipunctures and 10 successful capillary sticks on live individuals, documented by your instructor or supervisor.
The 30/10 minimum is the part most people forget. Your training program should track it; if you took your training years ago and have to recall it, contact your program for a transcript before you apply.
What the exam actually looks like
| Detail | Spec |
|---|---|
| Total questions | 120 (100 scored + 20 unscored pretest) |
| Time limit | 2 hours |
| Format | Multiple choice, four options per question |
| Delivery | Computer-based, in-person at PSI center or live online proctored |
| Cost | $117 (US, 2026) |
| Passing score | 390 on a 200–500 scaled scoring system |
| Result timing | Pass/fail on screen at end; full score report within 2 business days |
| Renewal | Every 2 years, 10 CEU credits |
What’s actually on the test
The NHA publishes their exam blueprint as five domains. Memorize the weighting — it tells you exactly where to spend your study time.
| Domain | Weight | What it covers |
|---|---|---|
| Safety and Compliance | 13% | OSHA, PPE, bloodborne pathogens, HIPAA, sharps handling |
| Patient Preparation | 16% | Patient ID, consent, communication, special populations |
| Routine Blood Collections | 40% | Order of draw, venipuncture, capillary, tube selection, complications |
| Special Collections | 15% | Blood cultures, glucose tolerance, therapeutic drug monitoring, blood donor draws |
| Processing | 16% | Centrifugation, labeling, transport, rejection criteria, chain of custody |
40% of the exam is routine blood collection. If you nail that domain and don’t bomb the others, you pass.
How to study (4-week plan that works)
Week 1 — Foundations. Order of draw cold. Tube colors, additives, what gets tested in each. Read CLSI GP41 if you can get a copy through your training program. Do 50 practice questions on safety + tube selection.
Week 2 — Venipuncture mechanics. Anatomy of the antecubital fossa. Median cubital vs cephalic vs basilic and why basilic is last resort (nerve and artery proximity). Needle gauges, tourniquet technique, complications. 100 practice questions, focus on the “routine collections” domain.
Week 3 — Special collections + processing. Blood culture technique (skin prep matters most), 2-hour and 3-hour GTT timing, centrifuge speeds and times, specimen rejection criteria. 100 mixed-domain questions.
Week 4 — Full-length practice tests + weak-spot drill. Take at least two full-length 120-question timed practice tests. Track which domain you miss most and drill it. Sleep before exam day; don’t cram the night before.
Free practice questions in NHA style
1. A patient’s tourniquet has been on for 90 seconds while the phlebotomist searches for a vein. What is the appropriate action?
- A. Continue and complete the draw quickly
- B. Release the tourniquet and reapply after two minutes
- C. Move to the other arm and apply a new tourniquet
- D. Document “difficult draw” and proceed
Answer: B. Tourniquet time over one minute causes hemoconcentration and skews results.
2. Which tube is drawn immediately after a blood culture bottle in the standard order of draw?
- A. Lavender (EDTA)
- B. Green (heparin)
- C. Light blue (sodium citrate)
- D. Red (no additive)
Answer: C. Light blue follows blood culture to protect coagulation testing from contamination.
3. A phlebotomist must collect a CBC on a 4-year-old child. The child is calm and the antecubital veins are visible. What is the best approach?
- A. Capillary stick on the finger
- B. Venipuncture with a 21-gauge needle
- C. Venipuncture with a 23-gauge butterfly
- D. Defer to the patient’s parent
Answer: C. Butterfly with a smaller gauge is standard for pediatric venipuncture when veins are accessible.
4. Which of the following is the most common cause of hemolysis in a venipuncture sample?
- A. Drawing from a finger stick
- B. Forcing blood through a small-gauge needle with a syringe
- C. Inverting the tube too few times
- D. Using a 21-gauge needle
Answer: B. Excessive negative pressure from a syringe through a small-gauge needle is the leading mechanical cause.
5. Under HIPAA, a phlebotomist discussing a patient’s test results with the patient’s spouse in the hallway is a violation unless:
- A. The spouse asked first
- B. The patient is incapacitated
- C. The patient has given documented consent
- D. The conversation is brief
Answer: C. Without explicit, documented patient consent, sharing PHI is a HIPAA violation regardless of relationship.
What to bring to the test center
- Two forms of ID, one with photo. Names must match your NHA registration exactly.
- Your NHA confirmation email or candidate ID.
- Nothing else. No phone, no smart watch, no notes. PSI lockers store personal items.
If you fail
You can retake after 30 days. NHA allows up to four attempts per 12-month period. Use the score report to identify which domain dropped you and re-study that one. Most retakers pass on the second attempt; the failures usually come from people who didn’t identify their weak domain.
After you pass
Your CPT certification is valid for 2 years. To renew, you need 10 CEU credits and the renewal fee ($179 as of 2026). NHA provides some free CEU content; you can also count employer in-service training if it’s documented properly.
Don’t let it lapse. A lapsed CPT is harder to reinstate than to maintain, and many employers will not accept a non-current credential.
