Assort Health, a healthcare technology company that builds AI voice agents for medical practices and health systems, has raised $120 million in a Series C round that values the company at $1.2 billion. Menlo Ventures led the round, with participation from Lightspeed Venture Partners, Felicis, First Round Capital, Chemistry, former NFL quarterback Joe Montana, Tau Ventures and Quiet Capital.
The company launched in November 2023 and raised a $76 million Series B round in October. Total funding raised to date stands at $222 million.
Matt Murphy, a partner at Menlo Ventures, framed the investment around the company's traction in specialty care and its plans to move into larger health systems: "The healthcare system has historically had so many antiquated and inefficient processes that are finally being transformed with agentic platforms. Assort has established itself as the leader in the category with strong ROI, higher efficacy in providers, and better outcomes for patients. Their technology has proven out in specialty care, which is where the heavy lift really is and now they're setting their sights on large-scale health systems. These are massive markets with so much at stake. Based on their speed of execution and quality of the solution, we expect to see Assort in all corners of U.S. healthcare, powering every system and practice, in the coming years."
Assort Health builds voice AI agents tailored to specific medical specialties, including orthopedics, cardiology and immunology, originally focused on automating scheduling. The company has since expanded into intake forms, referrals, document processing, medication refills, real-time insurance eligibility checks, lab requests and payments.
Jon Wang, founder and co-CEO, told Fierce Healthcare, a healthcare industry publication, that revenue has grown 20 times over the past 15 months. He pointed to the company's data as a key differentiator, built on 190 million patient interactions, 62,000 care protocols and 1.6 million decision pathways. Assort Health developed Synapse, an AI model that the company says learns specialty workflow patterns across deployments and generates edge cases, tests and simulations for each one.
Wang described how Synapse changed implementation timelines: "The first phase of our business was all about understanding how complex and nuanced just simply automating patient access was. It [is] really hard to get it right. It took us six months to implement our AI agent. We built Synapse, which is our AI agent that gets better with every interaction. It now has 190 million patient interactions powering it, and so what used to take months it [is] now down to weeks. It has unlocked real scale deployment for this product, doing the highest automation rates in the lowest amount of time on the most complex workflows."
Wang said the company's strategy rests on owning what he calls the front door of healthcare: "We have all the patient communications data as well as all the business protocols that took us painstakingly many, many months to build into our engines."
The company is now building toward a second phase focused on what executives describe as a concierge, personalized patient experience. Wang described the goal as moving away from a system where patients repeat their history to every provider: "Our big push is moving towards healthcare that remembers. It's basically moving from a reactive healthcare system where you feel that you're invisible and you're constantly retelling your story over and over again to every single provider to a system that remembers."
Assort Health's voice AI agents handle inbound calls, triage, lab requests, medication refills, scheduling, insurance eligibility and intake in multiple languages. The agents also contact patients directly to close referral loops, act on detected care gaps such as missed mammograms, colonoscopies and vaccines, recover missed appointments and resolve outstanding payments. The platform writes details from each visit back into the electronic health record, covering referrals, document processing, patient intake and pre- and post-visit forms, and gives staff an AI copilot to manage patient access in real time.
The company calls the system connecting these functions a patient journey memory, intended to carry context such as language preference, visit history, tone, open tasks and sentiment across every interaction a patient has with a practice. Jeffery Liu, founder and co-CEO and a former software engineer at Facebook and Athelas, said the company plans to invest more than $70 million in R&D to build out this phase of the product.
According to the company, customers using the platform see a 5 percent increase in appointment volume and a 115 percent increase in labor capacity without adding front office staff.
MDCS Dermatology, a multi-location dermatology practice operating across New York and New Jersey, has used Assort Health's platform for two years, starting with inbound agents for scheduling and call triage before expanding to outbound agents. Parinita Amin, M.D., CEO of MDCS Dermatology, described the practice's selection criteria:
"For a dermatology practice, patient experience is everything, practice reputation is everything. This is really our front door. We really wanted to pick a tool where it's quality, quality, quality. We also wanted to work with a vendor that was really a full platform. I think one of the challenges for healthcare operators is the sprawl that's occurring with a lot of AI applications out there. Everyone does a little bit of something, but what practices really need is a one-stop shop and a platform that will continue to innovate."
MDCS Dermatology operates nine locations and sees between 130,000 and 138,000 patient visits annually. Amin said the practice evaluated other AI vendors before choosing Assort:
"Assort was the only true platform. It runs the full patient journey as one connected system, from referrals and document processing to intake, care gap closure, real-time eligibility, and payments. The difference is memory. Everyone else automates one piece and forgets the rest. Assort remembers every patient across every interaction and connects it all into one conversation. Our automation rate climbs every quarter as they execute against an ambitious roadmap, and the gap between Assort and everyone else keeps widening."
Amin described the platform as functioning like a member of the practice's team, connecting workflows that previously operated separately. She said the practice maintains a 4.9 star rating across 30,000 reviews on multiple platforms and has seen appointment bookings rise 20 percent, allowing the practice to grow and add providers.
Jon Shaker, executive director of the Boston Bone and Joint Institute, said the cost of a mishandled patient interaction goes beyond operational disruption: "That's why we wanted a partner with a proven track record of handling specialty care complexity at scale. Assort's experience across hundreds of deployments gave us confidence they could deliver from day one, and they've helped us ensure patients move through the right care journey from their very first interaction."
Assort Health is expanding into health system operations, working with organizations ranging from large community-based systems to academic medical centers, including John Muir Health, a health system that the company says is using the platform to support increasingly complex outpatient operations.
Assort Health operates in a market that has drawn significant venture funding this year. Artera, a healthcare company building AI agents for patient communications, raised $65 million in December. UnityAI is developing agentic AI tools to automate operational and administrative work in outpatient and clinical settings. EliseAI, a company that applies AI to administrative tasks, raised $250 million in a Series E round in August. Hello Patient has built generative AI agents to handle patient communications for medical practices. Tennr, which uses AI to automate document-heavy administrative workflows, raised $101 million last June. Prosper AI raised $30 million this week to scale its agentic AI platform for tasks spanning patient scheduling, insurance verification and billing.
Liu said Assort Health's data and implementation experience give it an advantage as the category becomes more competitive: "What's defensible is really what's hard to get, and we believe what's hard to get is data. We have the most data, the most implementations under our belt. We have proprietary data that Anthropic and OpenAI don't have and these smaller companies don't have."
Wang said he expects the market to consolidate around fewer vendors: "Provider groups know it, and the smart ones aren't buying another point solution. They want one partner with the capital and the engineering depth to transform how they operate over the long run. That's what we built. Our engineers learn across hundreds of customers and build every implementation for the specific practice in front of them."
