Zhū Fèiyuán 朱費元 (fl. mid-19th c., late Qīng), late-Qīng wàikē specialist physician. Author of the Línzhèng yīdé fāng 臨證一得方 (KR3ed128) in 4 juǎn, a clinical case-record formulary of approximately 100 cases organised by body-region and clinical-presentation type. The work belongs to the Xuē Jǐ – Lǐ Dōngyuán doctrinal tradition of wàikē practice, with strong anti-surgical polemical position and corresponding emphasis on careful internal-medication. Sparse biographical record; Zhū is not securely identified in CBDB or the standard Qīng biographical dictionaries.