Overview
Domain 1 has three official tasks. The first is obtaining subjective information: the chief complaint, history of present illness, past medical, family and social history, medications and the review of systems. The second is performing the right physical examination, focused for an acute problem or complete for a new patient or wellness visit, with technique and expected findings adjusted for age and development. The third is ordering, performing and interpreting screening and diagnostic tests, from USPSTF screening intervals to thyroid panels, anemia workups and urinalysis.
At 32% of scored items, about 43 of 135, this is the heaviest domain on the blueprint. Questions rarely ask for a definition. They describe a patient of a given age and ask which question, maneuver or test comes next, or what a finding means. Because the exam also weights items by age group, with older adults at 30%, assessment of older adults and adults dominates, but pediatric development still appears.
How it's tested
Assess items usually present a short vignette with age, sex, a complaint and a few findings, then ask for the next assessment step or the interpretation of a result. The best answer is the most appropriate first action in primary care, not the most thorough or most advanced option available.
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Next best assessment
A complaint is described and you choose the history question, exam maneuver or test that should come first.
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Interpret the finding
A physical sign, murmur, lab panel or screening result is given and you identify what it indicates.
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Screening eligibility
A patient's age, sex and risk factors are listed and you choose the screening test and interval that current guidelines support.
A 67-year-old man who quit smoking 10 years ago after a 40 pack-year history asks about cancer screening. Chest radiography is tempting because it is familiar, but it has no screening role. He is between 50 and 80, has at least 20 pack-years and quit within 15 years, so annual low-dose CT meets the USPSTF criteria. Eligibility, not symptoms, drives the answer.
Tasks 3
Official tasks from the AANPCB outline, in outline order.
1.1 Obtain elements of subjective patient information (e.g., chief complaint, history, review of systems)Chief complaint, HPI, past, family and social history, medications and ROS.
- What it means
- This task covers building the subjective database: the chief complaint in the patient's words, a symptom analysis such as OLDCARTS, past medical and surgical history, medications including supplements, allergies, family and social history, and a review of systems suited to the visit. It includes age-specific histories such as prenatal and birth history for infants and HEEADSSS for adolescents.
- What to understand
- The history yields most diagnoses in primary care, so the exam rewards the question that best separates likely causes or uncovers a red flag. Know which elements matter for each age: feeding and milestones in infants, confidential psychosocial screening in adolescents, and function, falls, cognition and polypharmacy in older adults. A medication history should always include over-the-counter and herbal products, because interactions and adverse effects often explain the complaint.
- How it shows up
- A vignette gives a complaint and asks which additional history question would be most useful, or which history element is a warning sign.
- Common confusion
- Treating the review of systems as the history of present illness; the HPI analyzes the chief complaint, while the ROS screens other systems.
1.2 Perform appropriate physical examination (e.g., focused, complete)Choosing focused or complete exams and knowing expected findings and special maneuvers.
- What it means
- This task covers deciding between a focused exam for an acute complaint and a complete exam for a new patient or wellness visit, using correct technique, and recognizing normal and abnormal findings across the lifespan. It includes special tests such as Lachman, McMurray, Phalen and Tinel, newborn checks such as Ortolani, Barlow and the red reflex, and heart sound and murmur interpretation.
- What to understand
- Each special test targets a structure: Lachman for the anterior cruciate ligament, McMurray for the meniscus, Phalen and Tinel for median nerve compression, Ortolani and Barlow for developmental hip dysplasia. Murmur location, timing and radiation narrow the lesion; a crescendo-decrescendo systolic murmur at the right upper sternal border radiating to the carotids suggests aortic stenosis. Normal age changes, such as an S4 or reduced skin turgor in older adults, should not be labeled disease.
- How it shows up
- A finding or suspected condition is named and you select the maneuver that confirms it, or you interpret an exam result.
- Common confusion
- Picking a maneuver for the wrong structure, such as McMurray for a suspected ligament tear, which tests the meniscus.
1.3 Order, perform, and interpret screening and diagnostic testsUSPSTF screening, lab interpretation and appropriate first-line imaging.
- What it means
- This task covers choosing screening tests by age and risk, ordering the right first diagnostic test, performing office tests, and interpreting results. Examples include colorectal screening from age 45, biennial mammography from 40, cervical cytology and HPV testing, lung cancer screening, thyroid function tests, complete blood counts with iron studies, A1C and urinalysis.
- What to understand
- Screening is for people without symptoms, while diagnostic testing evaluates a complaint. Learn common patterns: high TSH with low free T4 is primary hypothyroidism, while high TSH with normal free T4 is subclinical. Microcytic anemia with low ferritin points to iron deficiency. An A1C of 6.5% or higher is diagnostic for diabetes when confirmed. Sensitive tests rule conditions out when negative; specific tests rule them in when positive. Choose the cheapest test that answers the question first.
- How it shows up
- A result or a patient's risk profile is given and you choose the correct interpretation, screening interval or first test.
- Common confusion
- Using a screening recommendation for a symptomatic patient, who needs a diagnostic evaluation instead.
High-yield concepts
The terms, rules and formulas this domain turns into questions most often.
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OLDCARTS symptom analysis
Onset, location, duration, character, aggravating and relieving factors, timing and severity.
- Remember
- It structures the history of present illness.
- Tested as
- Next-question items in the history.
- Trap
- Skipping severity or timing when they change urgency.
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HEEADSSS
Adolescent psychosocial screen: home, education, eating, activities, drugs, sexuality, suicide and safety.
- Remember
- Interview the adolescent alone for part of the visit.
- Tested as
- Adolescent history items.
- Trap
- Asking sensitive questions with the parent present.
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Ottawa ankle rules
Clinical rules for deciding whether an ankle injury needs radiographs.
- Remember
- Bone tenderness at specific sites or inability to bear weight indicates imaging.
- Tested as
- Musculoskeletal test-ordering items.
- Trap
- Ordering films for every ankle sprain.
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Lachman vs. McMurray
Lachman tests the ACL; McMurray tests the meniscus.
- Remember
- Lachman is the most sensitive ACL test.
- Tested as
- Knee injury exam items.
- Trap
- Swapping the two maneuvers.
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Ortolani and Barlow
Newborn maneuvers for developmental dysplasia of the hip.
- Remember
- Barlow dislocates an unstable hip; Ortolani reduces it.
- Tested as
- Newborn exam items.
- Trap
- Reversing which maneuver does what.
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Aortic stenosis murmur
Systolic crescendo-decrescendo at the right upper sternal border radiating to the carotids.
- Remember
- Syncope or exertional symptoms raise concern.
- Tested as
- Cardiac exam interpretation.
- Trap
- Confusing it with mitral regurgitation, which is holosystolic at the apex.
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USPSTF colorectal screening
Screening for average-risk adults from 45 through 75.
- Remember
- Ages 76 to 85 are an individual decision.
- Tested as
- Screening eligibility items.
- Trap
- Starting at 50 from older guidance.
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USPSTF breast screening
Biennial mammography for women 40 through 74.
- Remember
- The 2024 update lowered the start age to 40.
- Tested as
- Screening items for women.
- Trap
- Using annual screening from 50.
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Lung cancer screening
Annual low-dose CT for ages 50 to 80 with 20 pack-years who smoke now or quit within 15 years.
- Remember
- Chest radiographs are not a screening option.
- Tested as
- Screening items for smokers.
- Trap
- Choosing chest X-ray.
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Thyroid function patterns
High TSH with low free T4 is overt primary hypothyroidism; low TSH with high free T4 is hyperthyroidism.
- Remember
- TSH is the first-line screen.
- Tested as
- Lab interpretation items.
- Trap
- Ordering a full panel or antibodies first.
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Microcytic anemia workup
Low MCV is followed by ferritin to separate iron deficiency from other causes.
- Remember
- Low ferritin confirms iron deficiency.
- Tested as
- Hematology lab items.
- Trap
- Labeling every microcytosis as iron deficiency without ferritin.
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Sensitivity vs. specificity
Sensitive tests rule out when negative; specific tests rule in when positive.
- Remember
- SnNout and SpPin.
- Tested as
- Test-choice reasoning.
- Trap
- Using a sensitive test to confirm a diagnosis.
Side by side
Concepts candidates mix up, compared on the point that decides the answer.
Screening vs. diagnostic testing
| Concept | Meaning | Key difference | Common trap |
|---|---|---|---|
| Screening test | Applied to people without symptoms based on age and risk | Detects disease early in a population | Applying it to a symptomatic patient |
| Diagnostic test | Ordered to evaluate a complaint or abnormal finding | Answers a specific clinical question | Delaying it while waiting for a screening interval |
Knee and wrist special tests
| Concept | Meaning | Key difference | Common trap |
|---|---|---|---|
| Lachman | Anterior tibial translation with knee in slight flexion | Tests the anterior cruciate ligament | Using it for meniscal injury |
| McMurray | Rotation and extension of the flexed knee | Tests for meniscal tears | Using it for ligament laxity |
| Phalen and Tinel | Wrist flexion and tapping over the median nerve | Reproduce carpal tunnel symptoms | Confusing with de Quervain testing (Finkelstein) |
Thyroid lab patterns
| Concept | Meaning | Key difference | Common trap |
|---|---|---|---|
| High TSH, low free T4 | Overt primary hypothyroidism | Thyroid gland failure | Calling it subclinical |
| High TSH, normal free T4 | Subclinical hypothyroidism | Gland still compensating | Treating every case automatically |
| Low TSH, high free T4 | Hyperthyroidism | Excess thyroid hormone | Confusing with central causes |
Exam traps
Each trap is an answer that looks right. Learn the clue that should change your mind.
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Chest X-ray screening
- What candidates pick
- Order an annual chest radiograph for a long-term smoker.
- Why it looks right
- It is quick and familiar.
- Why it's wrong
- Chest radiography has no role in lung cancer screening; eligible patients receive annual low-dose CT.
Clue to watch for A smoking history with no symptoms and a question about screening.
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MRI first
- What candidates pick
- Choose MRI for acute low back pain without red flags.
- Why it looks right
- It looks most thorough.
- Why it's wrong
- Imaging is not indicated early for uncomplicated low back pain; red flags such as saddle anesthesia or weight loss change that.
Clue to watch for Back pain under six weeks with no neurologic deficit or systemic signs.
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Full thyroid panel
- What candidates pick
- Order TSH, free T4, T3 and antibodies for fatigue.
- Why it looks right
- More data seems safer.
- Why it's wrong
- TSH alone is the recommended first screen; further tests follow an abnormal result.
Clue to watch for The question asks for the initial test.
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Screen at 50
- What candidates pick
- Start average-risk colorectal screening at 50.
- Why it looks right
- It was the standard for years.
- Why it's wrong
- USPSTF now recommends starting at 45 for average-risk adults.
Clue to watch for An asymptomatic 46-year-old asking about colon screening.
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Parent in the room
- What candidates pick
- Take the whole adolescent history with a parent present.
- Why it looks right
- Parents give useful history.
- Why it's wrong
- Part of the visit should be confidential so the adolescent can disclose sexual activity, substance use or mood symptoms.
Clue to watch for A teen visit that raises psychosocial questions.
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Normal aging as disease
- What candidates pick
- Label an S4, presbyopia or reduced skin turgor in an older adult as pathology.
- Why it looks right
- They differ from younger adults.
- Why it's wrong
- Some findings are expected age-related changes and should be interpreted in context rather than treated as disease.
Clue to watch for An otherwise well older adult with a single age-typical finding.
Answer framework
Use these steps for any Domain 1 assessment item to choose the next step the blueprint expects.
- Note the patient's age group and whether the visit is acute, chronic or preventive, because that sets which history, exam and tests fit.
- Look for red flags in the history first, such as weight loss, neurologic deficit or chest pain, since they change urgency and may make an emergency referral the right answer.
- Decide between a focused and a complete exam, then match any special maneuver to the exact structure suspected, such as the ligament, meniscus or nerve.
- For tests, separate screening of asymptomatic patients from diagnostic testing, and apply current USPSTF ages and intervals.
- Pick the least invasive, most efficient test that answers the question, then interpret results using known lab patterns.
Practice question
Want more like this? The AANPCB FNP practice test has questions for every domain.
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Study strategy
Because Assess is a third of the scored items, give it the most time. Begin with screening, since it is the most rule-based content: build a one-page table of USPSTF recommendations by age and sex, including colorectal, breast, cervical, lung, abdominal aortic aneurysm, osteoporosis, hepatitis C, HIV, diabetes and depression. Check every entry against the current USPSTF site, because start ages have moved recently.
Next, review the physical exam by body system. For each system, list the special maneuvers, what they test and the expected normal findings for infants, children, adults and older adults. Murmurs, knee tests and newborn hip checks are reliable sources of items.
Then work on lab interpretation with patterns rather than reference ranges: thyroid, anemia, liver enzymes, renal function, urinalysis and lipids. Finally, practice vignette questions that ask for the next assessment step, and when you miss one, write down why the correct option was more efficient or more evidence-based than your choice. Weight your pediatric review toward development and the newborn exam, and your adult review toward chronic disease and older adult function, matching the age distribution on the blueprint.
FAQ
How much of the AANPCB FNP exam is the Assess domain?
Assess is 32% of scored content, which is 43 of the 135 scored items, making it the largest of the four practice domains.
Does the exam test screening guidelines?
Yes. Expect items on screening ages and intervals for common cancers and chronic conditions. Study the current USPSTF recommendations, since several were updated recently, including colorectal and breast screening.
How detailed are physical exam questions?
They focus on choosing the right maneuver and interpreting findings, such as which test confirms a meniscal tear or what a murmur's location and radiation suggest.
Are pediatric assessments tested?
Yes. Newborn through adolescent groups make up about a fifth of scored items, so know newborn checks, developmental milestones and adolescent psychosocial screening.
Do I need to memorize lab reference ranges?
Know key thresholds such as the A1C cutoff for diabetes, but focus more on patterns, such as what high TSH with low free T4 means.
How does Assess connect to the rest of the exam?
Assessment findings drive diagnosis, the plan and later evaluation, so errors here carry through the other three domains.
Test your Domain 1 knowledge
You have reviewed history taking, physical examination technique, screening intervals and lab patterns. Check whether you can pick the next assessment step under timed conditions.
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