The Complete Guide to Health Screenings — What to Get, When, and Why

Why Health Screenings Matter

Early detection changes outcomes fundamentally.

Cancer	5-Year Survival (Stage I)	5-Year Survival (Stage IV)
Colorectal	~90%	~15%
Breast	~99%	~28%
Lung	~61%	~7%
Cervical	~91%	~19%

Many conditions have no symptoms in early stages. No symptoms does not mean healthy. Screenings catch disease before it becomes difficult to treat.

Core Preventive Services Under US Health Insurance

Under the Affordable Care Act, insurance plans must cover certain preventive services at zero cost-sharing (no copay or deductible) when you see an in-network provider. These include:

Annual wellness visit
Blood pressure measurement
Cholesterol and lipid screening (adults at risk)
Diabetes (Type 2) screening
Colorectal cancer screening (50+)
Mammogram (women 40+)
Cervical cancer screening (Pap smear)
Lung cancer screening with low-dose CT (high-risk smokers 50–80)
Depression screening
Immunizations (flu, COVID-19, Tdap, etc.)

Always confirm coverage with your specific plan before scheduling.

Recommended Screening Schedule by Test

Blood Pressure

How often: at every medical visit; at home monitoring if elevated
Target: below 120/80 mmHg (normal)
Note: hypertension often has zero symptoms and is called the “silent killer”

Cholesterol (Lipid Panel)

Starting age: screening for adults 35+ (men) and 45+ (women) who are not at increased risk; earlier for those with risk factors
Frequency: every 5 years if normal; more frequently if elevated or on medication
Key values: LDL (“bad”), HDL (“good”), triglycerides, total cholesterol

Blood Glucose / Diabetes

Recommended: adults 35–70 who are overweight or obese (BMI ≥25)
Frequency: every 3 years if normal
Key values: fasting glucose (normal: 70–99 mg/dL); HbA1c (normal: below 5.7%)

Colorectal Cancer

Starting age: 45 for average-risk adults (2021 USPSTF update)
Options:
- Colonoscopy every 10 years (gold standard; detects and removes polyps)
- Stool DNA test (Cologuard) every 1–3 years
- Annual fecal occult blood test (FOBT) + colonoscopy if positive
Earlier for: first-degree relatives with colorectal cancer or polyps (10 years before their diagnosis age)

Breast Cancer (Mammogram)

Age 40–44: women may choose to start annual mammograms
Age 45–54: annual mammograms recommended
Age 55+: can switch to every 2 years, or continue annually
BRCA gene mutation: earlier and more intensive screening protocol

Cervical Cancer (Pap Smear + HPV Test)

Ages 21–29: Pap smear alone every 3 years
Ages 30–65: Pap smear + HPV co-test every 5 years (or Pap alone every 3 years)
After 65: can stop if prior results consistently normal
After hysterectomy: can stop if cervix was removed and no history of high-grade dysplasia

Lung Cancer

Who: adults 50–80 who currently smoke or quit within the past 15 years, with a 20+ pack-year smoking history
Method: annual low-dose CT (LDCT) scan
Coverage: zero cost-sharing under ACA for qualifying individuals

Abdominal Aortic Aneurysm (AAA)

Who: men aged 65–75 who have ever smoked
Method: one-time abdominal ultrasound
Coverage: zero cost-sharing under Medicare and most private plans

Additional Recommended Tests by Age

In Your 20s and 30s

Beyond routine basics, don’t overlook:

STI testing: for sexually active adults — chlamydia, gonorrhea, HIV, HPV (annual or per-risk)
HIV screening: at least once for all adults 15–65; more often for higher-risk individuals
Thyroid function (TSH): if you have symptoms (fatigue, weight changes, hair loss)
Complete blood count (CBC): checks for anemia, which is common especially in women with heavy periods
Dental checkup: every 6–12 months (your dentist can spot early signs of oral cancer)
Eye exam: every 1–2 years if you wear glasses or contacts; every 2 years otherwise

In Your 40s

Colonoscopy: if high risk due to family history, start at 40 rather than 45
Prostate-specific antigen (PSA): discuss with your doctor; men with family history of prostate cancer may start at 40
Bone density (DEXA): women approaching menopause; establishes a baseline
Electrocardiogram (ECG): may be included in a standard physical; detects arrhythmias
Eye pressure: glaucoma screening is important if you have a family history

In Your 50s and Beyond

Colonoscopy: every 10 years (if normal results)
Bone density (DEXA): women 65+ routinely; men 70+; earlier if risk factors present
Cardiac calcium scoring (CAC): a quick CT scan that measures coronary artery calcium, predicting 10-year cardiovascular risk
Sleep study (polysomnography): if you snore loudly or are suspected of having sleep apnea

Understanding Your Lab Results

Key Blood Test Values

Test	Normal Range	What Abnormal Means
Fasting glucose	70–99 mg/dL	100–125 = prediabetes; 126+ = diabetes
Total cholesterol	Under 200 mg/dL	200–239 = borderline; 240+ = high
LDL cholesterol	Under 100 mg/dL (optimal)	Higher thresholds depending on cardiovascular risk
Triglycerides	Under 150 mg/dL	200+ = high
ALT (liver enzyme)	Men <40 U/L; Women <35 U/L	Persistent elevation → liver evaluation
TSH (thyroid)	0.4–4.0 mIU/L	Low = possibly overactive; high = possibly underactive

When Results Are Flagged

A result flagged as “borderline” or “abnormal” needs follow-up — don’t ignore it. Many people receive concerning results and simply don’t act on them, allowing conditions to progress.

Make a follow-up appointment within 3 months of receiving flagged results, or sooner if your provider recommends it.

Making the Most of Your Annual Physical

Before Your Appointment

List any symptoms, changes, or concerns from the past year
Bring a current list of all medications and supplements
Know your family medical history (heart disease, cancer, diabetes in first-degree relatives)
Fasting for at least 8–12 hours if you want a fasting glucose and lipid panel

During the Visit

Ask specifically which screenings are due based on your age and risk factors
Ask what your results mean if you don’t understand the numbers
Discuss family history and whether it changes your screening timeline

After the Visit

Keep your results and compare them year over year — trends matter more than single readings
Follow up on any flagged results promptly
If your employer offers supplemental screenings (biometric screenings, health fairs), take advantage of them

Preventive screenings don’t find disease for its own sake — they catch it early enough to stop it. Building the habit of annual checkups is one of the most consistently evidence-backed investments you can make in your long-term health.

OIYO Editorial