Recommended Screening Tests for Primary Care

Cancer Screening

• The American Cancer Society recommends annual mammography beginning at age 40 for women 1
• The American Cancer Society recommends Pap test every 3 years, or Pap test with HPV DNA testing every 5 years for women with three normal test results in a row 1, 2
• The American Cancer Society recommends beginning colorectal cancer screening at age 50 with one of the following options: annual high-sensitivity guaiac fecal occult blood test (gFOBT) or fecal immunochemical test (FIT), colonoscopy every 10 years, flexible sigmoidoscopy every 5 years, or CT colonography every 5 years 2, 3
• The American Cancer Society recommends screening for prostate cancer in men 55-69 years based on shared decision-making due to uncertainty in the balance of benefits and harms 4

Cardiovascular Risk Assessment

• The American College of Cardiology recommends regular screening for blood pressure in all adults 1
• The American College of Cardiology recommends screening adults 40-75 years for total cholesterol, HDL, LDL, and triglycerides 1

Metabolic Screening

• The American Diabetes Association recommends fasting glucose or hemoglobin A1C for adults, with more frequent screening for those with BMI ≥30 kg/m² 1
• The American Association for Clinical Chemistry recommends a Comprehensive Metabolic Panel (CMP) to assess kidney function, liver function, and electrolyte balance 1
• The American Thyroid Association recommends TSH test to screen for thyroid disorders, particularly in women 1

Additional Recommended Screenings

• The US Preventive Services Task Force found insufficient evidence to assess the balance of benefits and harms of screening for impaired visual acuity in older adults 5
• The American Academy of Family Physicians recommends Complete Blood Count (CBC) to screen for anemia, infection, and blood disorders 1
• The American Academy of Family Physicians recommends urinalysis to screen for kidney disease and urinary tract infections 1
• The American Psychological Association recommends depression and anxiety screening using standardized screening tools 1
• The Centers for Disease Control and Prevention recommends Sexually Transmitted Infection (STI) screening for syphilis, gonorrhea, and chlamydia when indicated by risk factors 1

System Factors for Improving Screening Rates

• The American Cancer Society recommends implementing reminder systems to alert patients when they are due for screening 6
• The American Cancer Society recommends reducing organizational interfaces required to complete screening 6
• The American Cancer Society recommends promoting continuity in patient information, management, and therapy 6
• The American Cancer Society recommends addressing access barriers including insurance coverage and geographic distance 2

Cancer Screening Recommendations

Current Evidence-Based Screening Guidelines

• The American Cancer Society recommends annual mammography for women aged 45-54 years 7
• The American Cancer Society recommends the option to begin annual screening for women aged 40-44 years 7
• The American Cancer Society recommends transitioning to biennial screening or continuing annually for women aged ≥55 years 7
• The American Cancer Society recommends Pap test every 3 years for women aged 21-29 years 7
• The American Cancer Society recommends HPV test plus Pap test every 5 years (preferred) or Pap test alone every 3 years for women aged 30-65 years 7
• The American Cancer Society recommends discontinuing screening after age 65 if adequate prior negative screening 7
• The American Cancer Society recommends starting colorectal cancer screening at age 45 years for average-risk adults 7
• The American Cancer Society advises against substituting unvalidated MCED tests for evidence-based single-cancer screening 7

Cancer Screening Guidelines for Average‑Risk Adults

Breast Cancer Screening

• The American Cancer Society recommends annual mammography for women aged 45–54 years when overall health is good and life expectancy exceeds 10 years. 8
• Women aged 40–44 years may choose to begin annual mammography after shared decision‑making. 8
• For women 55 years and older, biennial mammography is preferred, though annual screening can be continued based on personal preference. 8
• Clinical breast examination should be performed every 3 years for women in their 20s–30s and annually after age 40. 9

Cervical Cancer Screening

• Screening should start at age 21 for all women, regardless of sexual activity onset. 10
• Ages 21–29: perform a Pap test alone every 3 years; HPV testing is not recommended in this age group. 10
• Ages 30–65: the preferred strategy is HPV testing combined with Pap (co‑testing) every 5 years; an acceptable alternative is Pap alone every 3 years. [10][8]
• Discontinue screening after age 65 if the woman has three consecutive negative Pap tests or two consecutive negative co‑tests within the prior 10 years, with the most recent test performed within the past 5 years. [10][8]
• Women who have undergone a total hysterectomy with removal of the cervix and have no prior cervical cancer should stop cervical cancer screening. [10][8]

Colorectal Cancer Screening

• Begin screening at age 45 for average‑risk adults using either stool‑based tests or structural examinations. 11
• First‑tier options:
  
  • Annual fecal immunochemical test (FIT). 11
  • Colonoscopy every 10 years. 11
• Second‑tier options:
  
  • High‑sensitivity guaiac‑based fecal occult blood test (gFOBT) annually.
  • Multitarget stool DNA test (e.g., Cologuard) every 3 years.
  • CT colonography every 5 years.
  • Flexible sigmoidoscopy every 5 years.
    (All second‑tier options are supported by the same guideline.) 11
• Continue screening through age 75 for individuals in good health with a life expectancy >10 years. 11
• For ages 76–85, decisions should be individualized based on health status, prior screening history, and life expectancy. 11
• Screening is discouraged after age 85. 11
• Any positive non‑colonoscopy screening test must be followed by a diagnostic colonoscopy to complete the screening process. [12][13]11

Lung Cancer Screening

• Low‑dose helical CT (LDCT) is approved only for high‑risk adults who are current or former smokers (quit ≤15 years ago) aged 55–74, have a ≥30 pack‑year smoking history, and are in good health to benefit from screening. 9

Prostate Cancer Screening

• Offer annual PSA testing and digital rectal examination to men starting at age 50 who have a life expectancy of ≥10 years, using shared decision‑making to discuss potential benefits and harms. 14

Common Pitfalls to Avoid

• Do not use single‑panel gFOBT collected during digital rectal examination because of its very low sensitivity. 15
• Standard screening protocols are insufficient for high‑risk patients (e.g., those with family history, genetic syndromes, or inflammatory bowel disease); these individuals require more intensive surveillance. [12][13]
• Do not screen women under age 21 for cervical cancer, regardless of sexual activity. 10
• Avoid annual cervical cancer screening at any age, as it provides no additional benefit and increases harms. 10

Evidence‑Based Cancer Screening Recommendations (Cited)

Breast Cancer Screening

• The American Cancer Society recommends that women aged 40‑44 may choose annual mammography after shared decision‑making, while women 45‑54 should have annual mammography and women ≥55 should transition to biennial mammography (or continue annually based on preference)【16】. Strength: High (multiple randomized trials supporting mortality benefit).

Cervical Cancer Screening

• The American Cancer Society advises Pap testing every 3 years for women aged 21‑29【16】. Strength: High (based on long‑term cohort data).
• For women aged 30‑65, the Society recommends HPV + Pap co‑testing every 5 years (preferred) or Pap alone every 3 years【16】. Strength: High (evidence of improved detection with co‑testing).

Colorectal Cancer Screening

• Screening should begin at age 45 with either annual fecal immunochemical testing (FIT) or colonoscopy every 10 years【16】. Strength: Moderate‑High (guideline consensus supported by observational studies).
• Any positive non‑colonoscopy test (e.g., FIT) must be followed by diagnostic colonoscopy【17】【18】. Strength: High (clinical practice guideline).

Prostate Cancer Screening

• The American Cancer Society suggests offering PSA testing to men starting at age 50 (or 55‑69) using shared decision‑making to discuss benefits and harms【19】. Strength: Moderate (conditional recommendation based on balance of benefits/harms).

Proven Screening Test Efficacy

• Guaiac‑based fecal occult blood testing (gFOBT) has demonstrated a 15‑33 % reduction in colorectal cancer mortality over 8‑13 years in prospective randomized trials【17】【18】. Strength: High (RCT evidence).
• Mammography has shown mortality reduction for breast cancer in multiple randomized trials, forming the basis for its guideline endorsement【16】. Strength: High (RCT evidence).
• Effective early‑detection tests require high diagnostic specificity (≈ 99 %) to limit false‑positive results and unnecessary follow‑up【20】. Strength: High (expert consensus and modeling data).