This annual summary documents the frequencies, rates, trends, and distributions of ambulatory visits, or outpatient care, among members of the active component of the U.S. Armed Forces, based on standardized records from U.S. military and civilian medical facilities worldwide.

This month’s edition of the MSMR reportable medical event summary provides an overview of data for 2025 for both active component service members and Military Health System beneficiaries.

This annual report summarizes exertional hyponatremia case frequency, rates, trends, demographics, geographic locations, and specific military characteristics from 2021 through 2025 for U.S. active component service members.

This annual report summarizes exertional rhabdomyolysis case frequency, rates, trends, demographics, geographic locations, and specific military characteristics from 2021 through 2025 for U.S. active component service members.

This annual report presents summaries of heat stroke and heat exhaustion case counts, incidence rates, and locations from 2021 through 2025 for U.S. active component service members.

This annual report summarizes the epidemiological patterns of malarial infections among members of the U.S. Armed Forces from 2016 through 2025.

This brief report examines the incidence of oropharyngeal cancer, a subcategory of head and neck cancer, diagnosed among U.S. active component service members from 2005 to 2024.

This study combined two sources of medical data to classify nicotine and tobacco use among U.S. active component service members as exposures delineated by recent use or history of any use.

This report estimates the 2010–2024 incidence of head and neck cancer among U.S. active component service members, updating a 2007-2019 analysis of oral and pharyngeal cancers published in MSMR by expanding the case definition to include all head and neck cancers.

This brief report provides a monthly update of the leading reportable medical events for U.S. active component service members in addition to Military Health System beneficiaries.

This Surveillance Snapshot describes the mid-year populations for U.S. active component service members of the Army, Navy, Air Force, Marine Corps, Space Force, and Coast Guard from 2023 through 2025.

This report utilized medical encounter data to assess the incidence and burden of endometriosis among U.S. active component service women from 2017 through 2024.

This report updates prior summaries of the numbers, rates, trends, and causes of deaths among service members from all components of the U.S. Armed Forces from 2010 through 2020.

This editorial presents an overview of the CHAMPS database, illustrating the utility and opportunities for research provided by CHAMPS.

This report describes the trends of tuberculosis testing and latent tuberculosis infection positivity in U.S. Army active component soldiers during the first decade following the 2013 U.S. Army Medical Command policy revision to a targeted, risk-based tuberculosis testing strategy.