misdiagnose

verb

mis·​di·​ag·​nose ˌmis-ˈdī-ig-ˌnōs How to pronounce misdiagnose (audio)
-ˌnōz,
ˌdī-ig-ˈnōs,
-ˈnōz,
-əg-
misdiagnosed; misdiagnosing

transitive verb

: to diagnose (someone or something) incorrectly
… babesiosis is often missed or misdiagnosed as malaria or flu.Linda Marsa
The researchers added that children with this disease are often misdiagnosed and thus inappropriately treated …Jane E. Brody

Examples of misdiagnose in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
She was initially misdiagnosed with Polycystic Ovarian Syndrome and still had no period. Jillian Frankel, People.com, 17 July 2025 There is an abundance of books on the topic by everyone from physicians to researchers to Naomi Watts; emerging research, and concrete information to help women navigate the often sudden, severe, and frequently misdiagnosed physical, emotional, and mental health symptoms that go along with it. Time, 26 June 2025 By enforcing data governance at collection, companies can prevent corrupted signals from training models that could misdiagnose patients or trigger financial errors. Expert Panel®, Forbes.com, 17 June 2025 As with so many scientific principles, it was misdiagnosed by ancient Greeks such as Aristotle, who attributed it to human vision. Phil Plait, Scientific American, 15 May 2025 See All Example Sentences for misdiagnose

Word History

First Known Use

1883, in the meaning defined above

Time Traveler
The first known use of misdiagnose was in 1883

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Cite this Entry

“Misdiagnose.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/misdiagnose. Accessed 29 Jul. 2025.

Medical Definition

misdiagnose

transitive verb
mis·​di·​ag·​nose (ˈ)mis-ˈdī-ig-ˌnōs, -ˌnōz How to pronounce misdiagnose (audio)
misdiagnosed; misdiagnosing
: to diagnose incorrectly

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