The exam at a glance (NHA CPT)
| Questions | 100 scored + 20 unscored pretest items |
| Time limit | 2 hours |
| Passing score | Scaled score of 390 out of 500 |
| Where | PSI testing centers or live-proctored online |
| Prerequisites | High school diploma/GED plus completed training or qualifying work experience |
| Renewal | Every 2 years with continuing education |
Note: several bodies certify phlebotomists (NHA, ASCP, AMT, NCCT). This guide follows the NHA CPT, the most common for new techs, but the content below overlaps heavily with all of them. Confirm current details with your certifier.
What's actually on it
| Domain | What it really tests |
|---|---|
| Safety & compliance | Infection control, PPE, needlestick protocol, OSHA standards |
| Patient preparation | Identification (two identifiers, every time), consent, positioning, difficult patients |
| Routine blood collections | The biggest domain: site selection, order of draw, tube additives, technique |
| Special collections | Blood cultures, pediatric/geriatric draws, capillary collection, non-blood specimens |
| Processing | Labeling, transport, centrifugation, handling and storage requirements |
The memorization core
A large share of the exam reduces to a short list of hard facts. If you know these cold, the rest is judgment:
- Order of draw: blood cultures → light blue (citrate) → red/gold (serum) → green (heparin) → lavender (EDTA) → gray (fluoride). Learn why (additive carryover) and it stops being a memory item.
- Tourniquet time: 1 minute max, or hemoconcentration skews results.
- Needle gauges: 21G routine adult, 22G small veins, 23G butterfly for fragile/pediatric veins.
- The site: median cubital vein first choice; never draw from an arm with an IV running, a fistula, or on the side of a mastectomy.
- Two patient identifiers before every draw: name and date of birth, verified against the requisition. Mislabeling is the cardinal sin of the profession and the exam knows it.
A 3-week study plan
- Week 1: Anatomy & equipment. Veins of the antecubital fossa, tube additives and their tests, needle systems. Start with Smart Quiz to find your baseline, then drill your weak categories daily.
- Week 2: Procedures. Routine and special collections, order of draw drills every day, complication scenarios (syncope, hematoma, no blood flow: what do you do?).
- Week 3: Simulate. Full timed simulations every other day; use the AI tutor on every miss. Book the exam when your readiness score holds green across all domains.