Mélanie d'Hervilly was reportedly a member of a noble family, but because of domestic violence she lived in the family of her art teacher Guillaume Guillon-Lethière in Paris from 1815 and made a living by selling her paintings. She received the surname Gohier as the posthumously adopted daughter of Louis-Jérôme Gohier, who had been president of the French Directory until 9 November 1799 (18 Brumaire VIII), when it was overthrown by Napoleon in the coup of 18 Brumaire. When he died in 1830 he named the then 30-year-old Mélanie d'Hervilly, 54 years younger, as his heir. She buried Gohier in Montmartre cemetery, and then two years later her foster-father the painter Lethière beside him.
During the cholera epidemic of Paris in 1832, she became interested in homeopathy. In 1834, she visited Samuel Hahnemann, and the year after they married and moved to Paris, where they opened a clinic. She was his student and assistant and soon an independent homeopathist. She was given a diploma from Allentown Academy of The Homeopathic Healing Art, co-founded by John Helfrich (1795–1852) in Allentown, Pennsylvania.
At the death of Samuel Hahnemann, she was entrusted with his clinic and the manuscript of his latest work, Organon. She continued with the practice, but in 1847, she was put on trial and found guilty of illegal practice. She continued to practice and was granted a medical license in 1872. She was a controversial person as both a woman physician and a woman homeopath.
She is buried in the Père Lachaise Cemetery.
- Richard Haehl, John Henry Clarke, F. J. Wheeler Samuel Hahnemann, his life and work: based on recently discovered ... 1922 - Volume 1 - Page 224 "This friend of hers, who had a family of his own, had been buried by the young Parisian woman in Montmartre cemetery. In 1832 she buried her foster-father Le Thiere in the same grave and in 1843, a third body. This friend of many " important "
- Editors notes to Samuel Hahnemann - Heilkunde Der Erfahrung 2010- Page 14 "Sie wurde, hauptsächlich aufgrund von Querelen zwischen Mélanie Hahnemann und verschiedenen Hahnemann-Schülern, erst 1921 von Richard Haehl aus dem Nachlass veröffentlicht. Eine nach Hahnemanns Tod von Arthur Lutze.. "