United States: credentials and parallel institutions
Elizabeth Blackwell received an MD from Geneva Medical College in New York in 1849—the first woman to receive that degree from an American medical school, not the first woman anywhere to practise medicine. Refused ordinary clinical opportunities, Elizabeth and Emily Blackwell and Marie Zakrzewska opened the New York Infirmary for Women and Children in 1857; its women's medical college followed in 1867. The National Library of Medicine documents both the degree and the institution-building that made it useful.
In 1850, Philadelphia's Female Medical College of Pennsylvania created another durable route to degrees, teaching, and hospital work. Race remained a separate barrier. Rebecca Lee Crumpler graduated from the New England Female Medical College in 1864, becoming the first African American woman known to earn an MD. Her 1883 A Book of Medical Discourses, addressed to mothers and nurses, joined formal medical credentials to household health instruction. Because little other personal evidence survives, the book is an important but self-authored account of her career, not a complete biography (NLM).