Two identifiers, every time.

Two patient identifiers on every draw. The single most-tested patient-safety topic on the ASCP PBT exam, and the easiest one to lose points on if you skim.

Why this is non-negotiable

A misidentified specimen is the single most-cited preventable error in transfusion medicine. The Joint Commission's National Patient Safety Goal #1 — "Identify Patients Correctly" — requires two patient identifiers on every blood draw before the needle ever touches skin. Failure to comply is a sentinel-event-class problem; on the exam it is a guaranteed item.

The two identifiers, and what doesn't count

• Identifier 1 — Full legal name. Ask the patient to state and spell their name. Compare to the wristband AND the requisition. Three-way match.
• Identifier 2 — Date of birth. Ask the patient to state their DOB. Compare to wristband AND requisition. Same three-way match.
• What does NOT count as an identifier: room number, bed number, "Mr. Smith in 302," or any spatial location. Locations change; patients move.
• Unconscious or unable to respond: use the wristband as the primary identifier and confirm with a family member or attending nurse. Document the verification path.
• No wristband: stop. Do not draw. Notify the nurse to apply a wristband. The exam will test this.

The three-way match in practice

Requisition says "Maria Garcia, DOB 04/15/1985." Wristband says "Maria Garcia, DOB 04/15/1985." Patient says "Maria Garcia, April fifteenth nineteen eighty-five." Three-way match. Proceed. Any one of the three off — even by a digit — and you stop.

Standards reference: The Joint Commission National Patient Safety Goal NPSG.01.01.01. Cross-referenced against the ASCP BOC PBT content guideline, Patient Care domain. PhlebotomySkills.com is exam-preparation content. Not a degree, not for-credit coursework, and not affiliated with any certifying body.