Fèi Yǎngzhuāng 費養莊 (fl. late 19th c., 清) was a late-Qīng physician of the lower Yangtze cholera-cult tradition, author of the Chóngdìng shāyì zhǐmí 重訂痧疫指迷 (KR3ed069), a revised compendium on the differential diagnosis and treatment of shāzhàng 痧脹 (literally “sand-bloat” — the cluster of cholera-like syndromes that swept the lower Yangtze in repeated outbreaks from the 1820s onward) and concurrent wēnyì 溫疫 (warm-pestilence). He draws on Xuē Yīpiáo 薛一瓢 薛雪 and Wáng Mèngyǐn 王孟英 王士雄 (mid-19th-century warm-disease masters) as theoretical authorities. The work belongs to the substantial late-Qīng literature of cholera and warm-pestilence pharmacy. No CBDB entry; possibly a relative of the Mènghé Fèi-clan but no documented filiation.