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A few weeks ago, I had a patient in his 90s whose chief complaint was "lassitude".

Much to my surprise, there is an ICD 10 code for lassitude: R53.1

When I look up R53.1 it says:

Weakness
Asthenia NOS
excludes: age-related weakness (R54)
muscle weakness (M62.8-)
sarcopenia (M62.84)
senile asthenia (R54)

Having ruled out muscle weakness, sarcopenia and not being quite sure how to distinguish senile asthenia from asthenia NOS, we agreed on a treatment.

I do not yet know if it is successful.

86
ha.

Las"si*tude (?), n. [L. lassitudo, fr. lassus faint, weary; akin to E. late: cf. F. lassitude. See Late.]

A condition of the body, or mind, when its voluntary functions are performed with difficulty, and only by a strong exertion of the will; languor; debility; weariness.

The corporeal instruments of action being strained to a high pitch . . . will soon feel a lassitude. Barrow.

 

© Webster 1913.

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