Team
Healthcare buyers buy from people.
One River is built by operators and ML engineers who have felt this problem from the inside — and have the scars to prove it.
Wenhsiu Hassan
Co-founder & Chief Executive Officer
Enterprise architect turned healthcare operator · Caltech
Delivered large-scale technology and process changes to financial systems at Bank of America before deciding ambulatory billing deserved the same engineering discipline. Trained at Caltech. At One River she leads the company.
Zafar Khan
Co-founder & Chief Technology Officer
Caltech EE · 30+ years building production AI and software
Owns the hybrid LLM-plus-rules architecture and the regression harness behind every release — large language models grounded in an explicit rules engine, benchmarked on a 4,000-encounter regression suite before a single line ships.
Umair Khan
Chairman of the Board
Serial entrepreneur · Investor · UC Berkeley Professor · MIT
Founding partner at Mentors Fund and Folio3 with multiple startup exits. Invests in seed-stage startups and teaches entrepreneurship at UC Berkeley.
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Make billing our problem. Not yours.
Every encounter becomes a clean record, accurate codes, and a paid claim — on the EHR you already run.