Zhāng Dǐng 張鼎, Táng court physician of the Kāiyuán 開元 era (fl. 713–741), is known only as the redactor who revised Mèng Shēn’s 孟詵 Bǔ yǎng fāng 補養方 into the form now received as Shíliáo běncǎo KR3ec008. The redaction must date between Mèng’s death (c. 713) and the Dūnhuáng manuscript witness (mid-Táng), giving a working window of c. 720–740.
CBDB has many homonymous Zhāng Dǐng records; the relevant entry is id 93535 (fl. 741–742), broadly consistent with the Kāiyuán dating but not securely attached to the Shíliáo redactor. Other Zhāng Dǐng entries in CBDB are mostly Sòng / Míng / Qīng and unrelated. No firm biographical detail beyond his association with the Shíliáo.
A second 張鼎 of the late Yuán / early Míng (c. 1288 – c. 1354; CBDB id 134342) is an unrelated calligrapher of Wúxiàn 吳縣 and does not figure in pharmacological history.