Chart — Professional Practice
Levels of Prevention Chart
One question classifies any intervention: what is the person’s disease status? No disease → primary. Undiagnosed, being screened → secondary. Diagnosed, limiting the damage → tertiary. The chart sorts the examples exams actually use.
Educational use only. This material supports nursing education and exam review. It is not medical advice and is not a substitute for clinical judgment, institutional policy, or medical direction. Always follow facility protocols and current provider orders.
The Three Levels
Primary
Prevent disease before it exists
Ask: Is the person healthy, with no sign of this disease?
- •Immunizations and vaccine clinics
- •Seatbelt, helmet, and safe-sleep teaching
- •Smoking prevention programs in schools
- •Prenatal folic acid; fluoridated water
- •Hand hygiene education for the public
- •Exercise and nutrition programs for healthy adults
Secondary
Detect disease early, before or at first symptoms
Ask: Are we screening or case-finding in someone not yet diagnosed?
- •Mammograms, colonoscopies, Pap tests
- •Blood pressure and glucose screening at health fairs
- •TB skin testing of exposed contacts
- •Newborn metabolic screening
- •Depression and intimate-partner-violence screening
- •Vision and scoliosis screening in schools
Tertiary
Limit disability and complications of established disease
Ask: Does the diagnosis already exist, and are we managing its consequences?
- •Cardiac rehab after MI; stroke rehabilitation
- •Diabetic foot care and A1c management teaching
- •Support groups (cancer survivors, AA)
- •Physical therapy after injury
- •Wound care for an existing pressure injury
- •Medication adherence programs for chronic disease
The Trap Items
| Intervention | Level | Why |
|---|---|---|
| Teaching a diabetic about foot care | Tertiary | The disease exists — education about managing it is tertiary, even though 'teaching' sounds primary |
| Screening an asymptomatic smoker with low-dose CT | Secondary | Screening = secondary, regardless of risk factors |
| Teaching a healthy teen about smoking risks | Primary | No disease present — preventing it from starting |
| Giving the flu vaccine to a heart-failure patient | Primary | Classify by the target disease: influenza isn't present, so prevention of it is primary — comorbidity doesn't change the level |
| Bedside swallow screen after stroke | Secondary-style screening within tertiary care | Exams usually frame post-stroke rehab measures as tertiary; isolated 'screening' wording points secondary — read what the question targets |
Exam Traps
- ✦Classify by disease status, never by activity type — teaching appears at all three levels.
- ✦The word 'screening' is a secondary-prevention flag; 'rehab' and 'support group' flag tertiary.
- ✦Immunization is the canonical primary answer — even in patients with other chronic diseases.
- ✦Classify against the disease the intervention targets, not the patient's other diagnoses.
Related Resources
Standards & sources
Fact-checked Jun 21, 2026This page is written to align with ANA Code of Ethics & Scope/Standards of Practice · NCSBN · HIPAA (U.S. HHS). It is an educational summary, not a citation of any single document — always verify specific doses, values, and protocols against current guidelines and your facility policy. How we source content →