Prevalence of Both Diagnosed and Undiagnosed Diabetes

Among the US population overall, crude estimates for 2019 were:

  • 37.3 million people of all ages—or 11.3% of the US population—had diabetes.
  • 37.1 million adults aged 18 years or older—or 14.7% of all US adults—had diabetes (Table 1a; Table 1b).
  • 8.5 million adults aged 18 years or older who met laboratory criteria for diabetes were not aware of or did not report having diabetes (undiagnosed diabetes, Table 1b). This number represents 3.4% of all US adults (Table 1a) and 23.0% of all US adults with diabetes.
  • The percentage of adults with diabetes increased with age, reaching 29.2% among those aged 65 years or older (Table 1a).
Table 1a. Estimated crude prevalence of diagnosed diabetes, undiagnosed diabetes, and total diabetes among adults aged 18 years or older, United States, 2017–2020
Characteristic Diagnosed diabetes Percentage (95% CI) Undiagnosed diabetes Percentage (95% CI) Total diabetes Percentage (95% CI)
Total 11.3 (10.3–12.5) 3.4 (2.7–4.2) 14.7 (13.2–16.4)
Age in years
18–44 3.0 (2.4–3.7) 1.9 (1.3–2.7) 4.8 (4.0–5.9)
45–64 14.5 (12.2–17.0) 4.5 (3.3–6.0) 18.9 (16.1–22.1)
≥65 24.4 (22.1–27.0) 4.7 (3.0–7.4) 29.2 (26.4–32.1)
Sex
Men 12.6 (11.1–14.3) 2.8 (2.0–3.9) 15.4 (13.5–17.5)
Women 10.2 (8.8–11.7) 3.9 (2.7–5.5) 14.1 (11.8–16.7)
Race-Ethnicity
White, non-Hispanic 11.0 (9.4–12.8) 2.7 (1.7–4.2) 13.6 (11.4–16.2)
Black, non-Hispanic 12.7 (10.7–15.0) 4.7 (3.3–6.5) 17.4 (15.2–19.8)
Asian, non-Hispanic 11.3 (9.7–13.1) 5.4 (3.5–8.3) 16.7 (14.0–19.8)
Hispanic 11.1 (9.5–13.0) 4.4 (3.3–5.8) 15.5 (13.8–17.3)
Table 1b. Estimated number of adults aged 18 years or older with diagnosed diabetes, undiagnosed diabetes, and total diabetes, United States, 2019
Characteristic Diagnosed diabetes Number in Millions (95% CI) Undiagnosed diabetes Number in Millions (95% CI) Total diabetes Number in Millions (95% CI)
Total 28.5 (25.9–31.2) 8.5 (6.8–10.2) 37.1 (33.2–40.9)
Age in years
18–44 3.5 (2.8–4.2) 2.1 (1.4–2.9) 5.6 (4.6–6.7)
45–64 11.8 (9.9–13.6) 3.8 (2.7–4.8) 15.5 (13.1–17.9)
≥65 13.3 (12.0–14.5) 2.6 (1.5–3.7) 15.9 (14.5–17.4)
Sex
Men 15.4 (13.5–17.3) 3.6 (2.5–4.7) 19.1 (16.7–21.4)
Women 13.1 (11.3–14.9) 4.9 (3.2–6.6) 18.0 (15.0–21.0)
Race-Ethnicity
White, non-Hispanic 17.8 (15.2–20.4) 4.3 (2.5–6.2) 22.2 (18.5–25.8)
Black, non-Hispanic 3.9 (3.3–4.6) 1.5 (1.0–1.9) 5.4 (4.7–6.1)
Asian, non-Hispanic 1.8 (1.5–2.1) 0.9 (0.5–1.2) 2.7 (2.2–3.1)
Hispanic 4.7 (4.0–5.3) 1.8 (1.3–2.3) 6.5 (5.8–7.2)

Trends in Prevalence of Diagnosed Diabetes, Undiagnosed Diabetes, and Total Diabetes

  • During 2001–2020, the age-adjusted prevalence of total diabetes significantly increased among adults aged 18 years or older (Figure 1).
  • Prevalence estimates for total diabetes were 10.3% in 2001–2004 and 13.2% in 2017–2020 (Appendix Table 2).
  • During this period, the age-adjusted prevalence significantly increased for diagnosed diabetes. No significant change in undiagnosed diabetes prevalence was detected (Figure 1; Appendix Table 2).

Figure 1. Trends in age-adjusted prevalence of diagnosed diabetes, undiagnosed diabetes, and total diabetes among adults aged 18 years or older, United States, 2001–2020.

Line chart displaying total diabetes, diagnosed diabetes and undiagnosed diabetes during a yearly time period between 1999 to 2016.

Notes: Diagnosed diabetes was based on self-report. Undiagnosed diabetes was based on fasting plasma glucose and A1C levels among people self-reporting no diabetes. Time period 2017–2020 covers January 2017 through March 2020 only.

Data source: 2001–March 2020 National Health and Nutrition Examination Surveys.

Page last reviewed: December 29, 2021