In HMO coverage, preventive services include:

Preventive services are health care services focused on preventing diseases and promoting wellness, rather than treating existing illnesses. Childhood immunizations are a quintessential example of preventive care, as they are administered to healthy individuals to build immunity and prevent future infections. Health Maintenance Organizations (HMOs) and federal regulations, such as the Affordable Care Act (ACA), place a strong emphasis on covering preventive services like immunizations without cost-sharing to improve long-term health outcomes and manage healthcare costs effectively. The other options represent therapeutic or restorative care provided in response to an existing condition, injury, or illness.

A. Rehabilitation therapy: This is a restorative service to help a patient recover skills and functions after an illness or injury, not a preventive measure.

B. Treatment for alcoholism: This is a therapeutic service for a diagnosed substance use disorder, which falls under behavioral health treatment, not primary prevention.

D. Home health services: This is a form of skilled care provided to individuals recovering from illness or managing chronic conditions at home, not a preventive service.

1. U.S. Department of Health & Human Services. Preventive Care. HealthCare.gov. Retrieved from https://www.healthcare.gov/preventive-care-children/. This official federal resource explicitly lists "Immunization vaccines for children from birth to age 18" as a covered preventive service for all ACA-compliant health plans, including HMOs.

2. Code of Virginia. § 38.2-4301. Definitions. In the context of Health Maintenance Organizations, "Basic health care services" is defined to include "preventive health services." While the code does not enumerate every service, childhood immunizations are a universally accepted component of this category under state and federal law.

3. Johns Hopkins Bloomberg School of Public Health. JHSPH OpenCourseWare, "Principles of Management in Public Health." Course materials frequently discuss the managed care model (HMOs) and its foundational principle of using preventive services, such as vaccinations, to control costs and improve population health. This contrasts with the fee-for-service model, which is reactive to illness.