Top Healthcare Websites in the United States

Key Insights on Top Healthcare Websites in the United States on March 2026

As of March 2026, nih.gov leads Healthcare in the United States with 93.31M monthly visits. Its audience skews desktop-first (55.76% desktop / 55.76% mobile), and traffic is up month over month 24.74% and down year over year -14.37%. clevelandclinic.org holds second with 61.29M visits and a mobile-leaning mix (27.53% desktop / 72.47% mobile), while mayoclinic.org ranks third with 45.01M visits.

Across the leaders, phreesia.me is the most mobile-first (99.94% of visits), whereas availity.com is the most desktop-reliant (97.89%). Momentum favors icd10data.com in the latest month (183.84%), while heart.org shows the steepest pullback.

Acquisition patterns also differ: nih.gov is driven primarily by search, nih.gov by direct, and nih.gov by referral; overall, 74 of the top 100 sites are direct-led, 16 are search-led, and 10 lean on social.

These insights come from the Traffic & Market Toolkit, enriched with extensive clickstream data.

Our AI algorithms analyze petabytes of information from a blend of proprietary and external data pools, reflecting the online activities of over 200 million anonymized users.

For more detailed information on our data-gathering and analysis process, please visit our information page here.