Abstract: This disclosure provides an efficient, hands-free system and method for capturing and recording patient data in critical care environments. The systems and methods described herein enables clinicians to record and transcribe patient information onto a disposable medical record tag (akin to a military ID tags), which accompanies the patient throughout initial stabilization and presentation to a treatment center. A Pre-Hospital Treatment & Triage (PHT) guidance system, visible in the HMD, can guide caregivers and/or first responders through treating the patient and documenting a patient's medical condition and treatment status, and triaging patients to the appropriate level of care. The head-mounted display can wirelessly transfer the patient's treatment data to a lightweight disposable data tag, referred to as an electronic TCCC (E-TC3) that is affixed to the patient. The data tag digitally stores a patient's health status, and displays a specific color based on a patient's degree of injury.