Yóu Chéng 尤乘 (zì Shēngzhōu 生洲, fl. Kāngxī era, late 17th c.), Qing physician and disciple of 李中梓 Lǐ Zhōngzǐ. No CBDB record. Active publishing 1660s–1690s.
His principal contribution is the supplementing-and-redaction (zēngjí 增輯) of his teacher’s manuscript Bìngjī shāzhuàn 病機沙篆 (KR3eh023), which he printed in Kāngxī bǐngwǔ = 1666 with his own added prescriptions and case-notes. The combined work is part of the Shìcái sān shū 士材三書 (the “Three Books of Shìcái,” Lǐ Zhōngzǐ’s zì) collection — alongside Yīzōng bìdú 醫宗必讀 and Zhěnjiā zhèngyǎn 診家正眼 — which was Yóu Chéng’s editorial project to consolidate his master’s medical legacy.
Yóu also produced his own Shòushì qīngbiān 壽世青編 (a compendium on health-cultivation and longevity), continuing the family-school transmission from Lǐ Zhōngzǐ.