6.1 Primary, Secondary, and Tertiary Prevention

The current FNP-BC Test Content Outline places age-appropriate primary, secondary, and tertiary prevention as the first knowledge item in Domain III Planning — 29 scored items (19%) through the October 18, 2026 administration and still 29/19% beginning October 30, 2026. ANCC is not asking you to recite Leavell and Clark. It is asking you to look at a listed action — a first HPV dose, a FIT kit, an ACE inhibitor, a cardiac-rehab referral — and name the level. Candidates lose items when they classify the machine instead of the moment in the natural history. A mammogram is not automatically secondary prevention. A diagnostic mammogram for a hard 2-cm mass is workup of disease. The same machine, used on an asymptomatic 48-year-old, is secondary prevention.

Same activity, different TCO domain

Screening already appeared in Domain I Assessment (population health promotion and screening; age-specific calendars in Section 2.4). Planning is not a second copy of that chapter. Assessment items ask: Who is eligible? What is the pretest risk? Which authority applies? Is this person asymptomatic? Planning items ask: What level of prevention is this action? What belongs on the plan today? What do I schedule, prescribe, or teach so the harm never starts, is caught early, or does not disable the person who already has the disease?

If the stem lists several actions and asks which level, ignore how “nursing” the action feels. Classify by when in the natural history you are intervening.

The three-level test

Use one question: Has the target condition already occurred in this person?

• Primary prevention acts before the condition exists. The person is well with respect to that target. You reduce incidence: immunize, keep tobacco from ever starting, buckle the seat belt, start PrEP in a person without HIV, paint fluoride on sound teeth, prescribe movement as a habit.
• Secondary prevention finds preclinical or early disease in someone who is still asymptomatic for that condition, then interrupts progression. Screening mammography, A1c in an overweight 35-to-70-year-old, colonoscopy or FIT from age 45, office blood-pressure measurement in adults, and PHQ depression screening are the ANCC-ready examples.
• Tertiary prevention assumes established disease and aims at complications, disability, recurrence, and death. Cardiac rehabilitation after myocardial infarction, an ACE inhibitor or ARB for diabetic CKD with albuminuria, structured diabetic foot care, and secondary stroke prevention (antithrombotic therapy, blood-pressure and lipid targets, smoking cessation after a cerebrovascular event) live here.

A usable exam shorthand: primary = keep it from starting, secondary = find it early, tertiary = keep it from wrecking the person who already has it.

Primordial prevention (changing the social and environmental soil — soda taxes, housing quality, air standards) appears in public-health textbooks. The official TCO names three levels. If a stem offers only primary, secondary, and tertiary, do not invent a fourth box. If a stem is clearly about SDOH and policy, you are usually in risk assessment or resource management, not in a fourth prevention grade.

Primary prevention the FNP actually plans

Primary prevention is not a poster that says “be healthy.” It is a specific protection or a health-promotion behavior tied to a named harm.

• Vaccines prevent infection and its complications. Building the ACIP series is primary prevention even when the same visit includes secondary screens. Choosing and scheduling the dose is Planning; injecting it is Implementation (Section 6.4).
• Seat belts, car seats, helmets, and locked firearm storage prevent injury. Injury prevention is as fair a Planning item as a vaccine.
• Never-start tobacco in an adolescent or a never-smoker is primary. Counseling a 40-pack-year adult to quit still prevents future disease, but once COPD, CAD, or lung cancer exists, cessation also serves a tertiary goal. Read the stem’s target condition.
• PrEP (tenofovir/emtricitabine or another currently indicated regimen) for a person without HIV is primary prevention of HIV. It is not treatment of HIV and it is not a screen for HIV — although you must document a negative HIV test before and during PrEP. That test is a safety step, not the prevention level of the drug.
• Fluoride (varnish in the medical home, community water, toothpaste counseling) prevents caries on teeth that do not yet have cavities. Treating existing decay is not primary.
• Exercise and nutrition in a person without the target disease (no diabetes yet, no CAD yet) are primary. The identical walking prescription after a stent is a cousin of tertiary cardiac rehabilitation.

Do not relabel prenatal folate as “secondary prevention of anemia” in a healthy pregnancy. Folate before conception and in early pregnancy is primary prevention of neural-tube defects.

Secondary prevention: screening, not diagnosis

Secondary prevention requires an asymptomatic person and a test or exam used to detect disease early. These are the items you should classify in one glance:

The moment the patient has a symptom, sign, or already-abnormal screen, the next test is diagnostic, not secondary prevention. Diagnostic colonoscopy for iron-deficiency anemia is not “the USPSTF 45-year-old screen.” Diagnostic mammography for a dominant mass is not biennial screening. A repeat A1c to confirm diabetes after a first abnormal value finishes the diagnostic sequence (Diagnosis chapters), even though the first A1c in an asymptomatic overweight 44-year-old was secondary prevention.

USPSTF Grade C services (selective offer) and Grade I services (insufficient evidence) can still be secondary prevention if they are screens. The grade tells you how strongly to offer, not the epidemiologic level.

Tertiary prevention: the disease is already on the problem list

Tertiary planning is easy to under-call because it looks like “just treatment.” ANCC still wants the level.

• Cardiac rehabilitation after MI or revascularization reduces recurrent events and death. Refer. Do not only up-titrate a beta blocker and call the visit complete.
• ACE inhibitor or ARB (and, in current diabetes/CKD care, usually an SGLT2 inhibitor when indicated) in diabetic CKD protects residual GFR and prevents kidney failure and heart failure — classic tertiary prevention of diabetic renal and cardiovascular complications.
• Foot care in diabetes: daily inspection teaching, monofilament exams, footwear, rapid referral of ulcers. The diabetes already exists; you are preventing amputation.
• Secondary stroke prevention: antithrombotic choice by mechanism, BP control, high-intensity statin, lifestyle, and carotid or atrial-fibrillation pathways as indicated. This is not the same as aspirin for a low-risk 45-year-old, which is a primary-prevention decision and is preference-sensitive under current USPSTF language.

Other clean tertiary examples: pulmonary rehabilitation in COPD, foundational HFrEF therapy, disease-modifying treatment after a fragility fracture, and vision rehabilitation after stroke. Treating the acute illness in front of you (antibiotics for pneumonia) is treatment. Teaching that same patient pneumococcal vaccination is primary prevention of the next infection. One visit can contain three levels. Classify each action, not the appointment type.

Twelve actions, one level each

ANCC loves a list. Classify the action, not a rhyme.

Gray zones the exam likes

Statins. A 55-year-old with diabetes and a 12% 10-year risk who has never had an atherosclerotic event: the statin is primary prevention of ASCVD (and matches the USPSTF Grade B offer from Section 2.1). The same molecule after STEMI is tertiary. The drug does not determine the level; the natural history does.

Blood-pressure work. Measuring BP in an undiagnosed adult is secondary. Drug therapy after you have diagnosed hypertension is treatment that also prevents stroke and CKD — most outlines still call the screen secondary and the complication-avoiding regimen tertiary once disease is established. If the stem says “which level is annual BP screening,” the answer is secondary.

Aspirin. After ACS or ischemic stroke, antiplatelet therapy is tertiary. For primary prevention, current USPSTF language is selective (Grade C) at 40–59 with ≥10% 10-year risk and Grade D at 60 and older. Do not automatically add aspirin to a wellness plan.

A1c in known diabetes. Surveillance A1c every 3–6 months is monitoring of established disease (Evaluation / Implementation), not a new secondary screen.

Age-appropriate. Primary prevention in a 2-month-old is the infant vaccine series and safe-sleep counseling. Secondary prevention in that infant is not a mammogram. Tertiary prevention in a frail 88-year-old is fall-injury reduction and heart-failure daily-weight teaching, not a new 30-year cancer-screening calendar. Match the level and the age group.

Vignette. A 56-year-old woman is new to the panel. BMI is 34. She has never had colorectal screening. Last mammogram was four years ago. She does not know her A1c. You diagnose type 2 diabetes (A1c 7.8%) and find a urine albumin-creatinine ratio of 85 mg/g with eGFR 72. Today’s plan contains three levels at once: influenza and COVID vaccination per current ACIP (primary), colonoscopy or FIT now that she is 56 and overdue plus catch-up mammography (secondary — she is still asymptomatic for those cancers), and metformin plus an ACE inhibitor or ARB for diabetic CKD, plus foot-care teaching (tertiary). If ANCC lists only the ACE inhibitor and asks the level, the answer is tertiary. If it lists only the FIT, the answer is secondary.

When you cannot decide, write the target condition on the scratch board: “Prevent what in whom?” Incidence in a well person is primary. Early detection in an asymptomatic person is secondary. Limit harm from a disease already present is tertiary.