Background-The Centers for Disease Control and Prevention's Million Hearts initiative includes an ambitious ≥80% blood pressure control goal in U.S. adults with hypertension by 2022. We used the validated Blood Pressure Control Model (BPCM) to quantify changes in clinic-based hypertension management processes needed to attain ≥80% blood pressure control.Methods and Results-The BPCM simulates patient blood pressures weekly using three key modifiable hypertension management processes: office visit frequency, clinician treatment intensification given an uncontrolled blood pressure, and continued antihypertensive medication use (medication adherence rate). We compared blood pressure control rates (using the Seventh Joint National Committee on hypertension targets) achieved over four years between usual care and the best observed values for management processes identified from the literature (1-week return visit interval, 20%−44% intensification rate, and 76% adherence rate). We determined the management process values needed to achieve ≥80% blood pressure control in U.S. adults. In adults with uncontrolled blood pressure, usual care achieved 45.6% control (95% uncertainty interval [UI] 39.6%−52.5%) and literature-based best observed values achieved 79.7% control (95% UI 79.3%−80.1%) over four years. Increasing treatment intensification rates to 62% of office visits with an uncontrolled blood pressure resulted in ≥80% blood pressure control, even when the return visit interval and adherence remained at usual care values. Improving to best observed values for all three management processes would achieve 78.1% blood pressure control in the overall U.S. population with hypertension, approaching the ≥80% Million Hearts 2022 goal.Conclusions-Achieving the Million Hearts blood pressure control goal by 2022 will require simultaneously increasing visit frequency, overcoming therapeutic inertia, and improving patient