In general, CHAMPVA covers most health care services and supplies that are medically necessary. Special rules and/or limitations do apply to certain services. Some services (even when prescribed by a physician) are not covered under CHAMPVA. Be aware that this handbook does not cover all CHAMPVA policies and the benefits may change over time. Clarification of covered/non-covered services, as well as limitations, can be obtained by calling us at 1-800-733-8387 or for general questions, contact us via the Inquiry Routing & Information System (IRIS). IRIS is a tool that allows us to communicate in a secure format and will be used instead of our traditional email links. For specific guidance when using IRIS for your inquiry click here. You can also visit our website at www.va.gov/hac.