What’s on the NHA CPT Exam? Phlebotomy Domain Breakdown (2026)
The current NHA Certified Phlebotomy Technician (CPT) exam covers 5 content domains: Routine Blood Collections (28%, 28 items), Safety and Compliance (26%, 26 items), Patient Preparation (20%, 20 items), Processing (14%, 14 items), and Special Collections (12%, 12 items). The exam totals 120 questions, 100 scored plus 20 unscored pretest items mixed in unmarked, delivered over a 2 hour time limit through NHA’s testing vendor PSI. This is the current version, live since January 7, 2026 and built from a 2024 job task analysis of practicing phlebotomy technicians, as of September 2026. The item counts and weights come directly from NHA’s own CPT Test Plan. The domain that carries the most weight, Routine Blood Collections, covers the hands on venipuncture and capillary collection skills at the center of the job, while Safety and Compliance, the second largest domain, covers infection control, sharps handling, and workplace regulations. Together these two domains make up 54% of the scored exam, so a study plan needs to weight them accordingly rather than spreading review time evenly across all 5 domains.
The 5 CPT Domains and How Much Each One Counts
NHA builds the CPT exam around a 2024 job analysis of practicing phlebotomy technicians, current as of the January 7, 2026 exam version. The bars below show each domain’s share of the 100 scored items, scaled so the largest domain reads at roughly 90% width.
Routine Blood Collections and Safety and Compliance: The Two Largest Domains
Routine Blood Collections, the single largest domain at 28% of the scored exam, covers the mechanics of a standard blood draw: assembling and verifying equipment, selecting and preparing the venipuncture site, applying and releasing the tourniquet, following order of draw, recognizing and responding to complications such as a failed draw or hematoma, performing capillary collection by dermal puncture, and completing post procedure patient care. Safety and Compliance, the second largest domain at 26%, covers the regulatory and infection control side of the role: workplace safety regulations, quality control for laboratory equipment and point of care testing, sharps and biohazard disposal, exposure control planning, standard infection prevention precautions, and basic emergency and first aid response. Between them, these two domains account for 54 of the 100 scored items, more than half the exam, which is why hands on procedural accuracy and safety protocol knowledge together carry more weight than any other pairing of domains on the CPT.
What the Other 3 Domains Cover
Patient Preparation (20%) covers everything that happens before the needle touches skin: positively identifying the patient, verifying and reviewing the test order or requisition, obtaining consent, communicating clearly with patients of different ages and backgrounds, and selecting and positioning for the draw site. Processing (14%) covers what happens to a specimen after collection: centrifuging, aliquoting, maintaining specimen integrity during storage and transport, and following chain of custody procedures when required. Special Collections (12%), the smallest domain, covers procedures beyond a routine draw, including blood culture collections, collections for special populations such as pediatric or geriatric patients, point of care testing, and other specialized collection scenarios that call for extra precautions.
How These Domains Show Up in Practice
Because Routine Blood Collections and Safety and Compliance together make up 54% of the scored exam, a study plan that treats all 5 domains equally will under-prepare you for the exam NHA actually gives. Scenario based practice covering venipuncture technique, order of draw, tourniquet use, complications, and standard safety precautions should take up the largest share of review time. That does not mean skipping Patient Preparation, Processing, or Special Collections: a handful of missed items in a smaller domain counts the same toward your scaled score as a handful missed in a larger one. It means allocating study time in proportion to what the test plan actually weighs, then making sure the smaller domains get real coverage too rather than a last minute skim.
Ready to see where you stand? Start a full NHA CPT practice test built around these exact domain weights, or try a free CPT practice test to sample questions from across all 5 domains first.
Frequently Asked Questions
How many domains are on the NHA CPT exam?
5: Safety and Compliance, Patient Preparation, Routine Blood Collections, Special Collections, and Processing.
What is the largest domain on the CPT exam?
Routine Blood Collections, at 28% of the exam (28 of 100 scored items). It covers equipment assembly, venipuncture technique, order of draw, tourniquet application, complications, capillary collection, and post procedure care.
How many questions are on the NHA CPT exam?
120 total questions: 100 scored and 20 unscored pretest items. The pretest items are mixed in unmarked, so every question should be treated as if it counts.
When did the current CPT exam version take effect?
January 7, 2026, based on a 2024 job task analysis of practicing phlebotomy technicians. NHA describes the update’s impact on topics and content areas as minimal compared to the prior version.
Sources
- NHA Certified Phlebotomy Technician (CPT) Test Plan, info.nhanow.com (2024 job task analysis)
- NHA, Coming Soon: New CPT Certification Exam Study Materials, info.nhanow.com
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