Mǎ Zōngsù 馬宗素 (fl. early-to-mid Yuán, ca. 1290s–1320s, 元), Yuán-period Hé-jiān-school physician in the lineage of 劉完素 Liú Wánsù. Author of two short Shānghán works:
- Liú Héjiān Shānghán yī jiàn 劉河間傷寒醫鑑 (KR3ef037, 1 juan).
- Shānghán qián fǎ 傷寒鈐法 (KR3ef048, 1 juan) — a calendar-based prognostic Shānghán treatise.
His biographical details are not preserved beyond his role as a Hé-jiān-school transmitter in the Yuán. No CBDB record.