Short answer
There’s no single cutoff. Levels under about 4 ng/mL have traditionally been considered normal, but doctors interpret PSA based on age, prostate size and trends over time.
The PSA Test
The PSA (prostate-specific antigen) test measures a protein in your blood. Higher levels can come from cancer, but also from BPH, prostatitis, recent ejaculation or vigorous cycling. That’s why doctors often repeat an elevated test before moving on to MRI or biopsy.
USA Prostate Exam: Quick Facts
- Tests
- Digital rectal exam (DRE) + PSA blood test
- DRE time
- Under 1 minute
- USPSTF (55–69)
- Individual decision (Grade C)
- USPSTF (70+)
- Recommends against routine PSA screening
- Higher risk
- Black men; father/brother diagnosed before 65
- Medicare
- Yearly PSA ($0) and DRE for men 50+
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