Osteopathic physicians are not evenly distributed in the United States. States with the highest concentration of osteopathic medical physicians are Oklahoma, Iowa, and Michigan where osteopathic medical physicians comprise 17–20% of the total physician workforce. The state with the greatest number of osteopathic medical physicians is Pennsylvania, with 8,536 DOs in active practice in 2018. The states with the lowest concentrations of DOs are Washington, DC, North Dakota and Vermont where only 1–3% of physicians have an osteopathic medical degree. Public awareness of osteopathic medicine likewise varies widely in different regions. People living in the midwest states are the most likely to be familiar with osteopathic medicine. In the Northeastern United States, osteopathic medical physicians provide more than one third of general and family medicine patient visits. Between 2010 and 2015 twelve states experienced greater than 50% growth in the number of DOs—Virginia, South Carolina, Utah, Tennessee, North Dakota, Kentucky, South Dakota, Wyoming, Oregon, North Carolina, Minnesota, Washington.