Lyme disease

Infections.

How common is Lyme disease in the US?

Confirmed and probable Lyme disease cases reported to CDC: 275,589 (Cases over eight years, not a rate; United States, 2008 to 2015). Source: MMWR Surveillance Summaries (CDC), 2017. Label: VERIFIED.

• 275,589 Confirmed and probable Lyme disease cases reported to CDC. Out of: Cases over eight years, not a rate. Where: United States. When: 2008 to 2015. Reported cases only. The report notes some states changed how they report. Label: VERIFIED.

  During 2008-2015, a total of 275,589 cases of Lyme disease were reported to CDC (208,834 confirmed and 66,755 probable).

  Source: Surveillance for Lyme Disease - United States, 2008-2015. MMWR Surveillance Summaries (CDC), 2017. PubMed 29120995. DOI 10.15585/mmwr.ss6622a1.

Each figure measures something different. Do not compare them with each other or with other conditions.

Medical codes

• ICD-10-CM FY2026: A69.20 Lyme disease, unspecified (narrower). Other codes in this category also apply.

Research activity

As of 2026-09-24: 133 registered studies on ClinicalTrials.gov (search Lyme Disease) and 1,984 PubMed records, 2021 to 2025. A count of records is not how common or serious the condition is.

Population information, not medical advice. Methodology · Known limitations