Cohere Health was founded in 2019 to attack one of the most universally hated processes in American healthcare: prior authorization. Traditionally, prior authorization forces physicians and their staff to spend hours faxing forms, calling payers, and waiting days for approvals on routine care. Cohere reimagines this workflow with an AI-driven clinical intelligence platform, Cohere Unify, that delivers instant, evidence-based decisions and proactively recommends optimal care pathways rather than simply gatekeeping access.
The platform ingests clinical context, payer policies, and nationally recognized guidelines to auto-approve appropriate requests in real time, while flagging only the small minority of cases that genuinely require human clinical review. This dramatically compresses turnaround times, reduces provider abrasion, and lets health plans redirect nurse reviewers toward higher-value care management work. Cohere positions itself not as a denial engine but as a 'care enablement' layer that aligns payers and providers around getting patients the right care faster.
Cohere has scaled rapidly, partnering with major national and regional health plans and supporting nearly 600,000 providers across a wide range of clinical specialties including musculoskeletal, cardiology, and oncology. The company processes more than 12 million prior authorization requests annually and reports significant reductions in approval times and administrative cost.
In May 2025, Cohere Health closed a $90 million Series C led by Temasek, bringing total funding to roughly $200 million. The capital funds expansion of the Cohere Unify platform into new clinical use cases and deeper investment in its AI product portfolio. With regulatory pressure mounting on payers to modernize prior authorization, Cohere is well positioned as a category leader.
The company is headquartered in Boston and led by co-founder and CEO Siva Namasivayam, a healthcare technology veteran who has guided Cohere from an early-stage idea to one of the most widely deployed clinical intelligence platforms working with health plans.