Somewhere in the middle of a twelve-hour ER shift, Ryan Johnson noticed something. The patients filling half the beds didn't need emergency care. They needed a nurse, a needle, and ninety minutes. They needed what he had already been doing for his own father at home - walking in, setting up an IV line, administering a specialty infusion, walking out. Routine medicine packaged in a non-routine setting, at ten times the price.
That observation sat with him for years. He was an ER nurse at UC San Diego Health, then a Heart Failure Clinical Coordinator, then a Clinical Nurse Educator. Twenty years across pre-hospital care, rescue work, bedside practice, and hospital leadership. He knew what the system was built for. He also knew what it kept doing anyway.
"After years in the emergency room treating patients with chronic conditions, and from treating my dad who suffers from one, I realized that moving specialty medicine into the home would be a sea change for everyone."- Ryan Johnson, Co-Founder & CEO, Float Health
The Spark Was Personal
Ryan's father has a chronic illness that requires regular specialty infusions. For most patients, that means scheduling clinic visits, waiting rooms, facility fees, insurance fights. For Ryan, it meant doing what he already knew how to do - administering the infusion at home, properly, safely, with no fanfare. What was difficult for millions of people was simply Tuesday for him.
The gap between those two realities is what Float Health was built to close. Ryan co-founded the company in 2021 alongside Christy Johnson, who joined as COO with startup and operations expertise. The premise was blunt: home infusion has been medically viable for thirty years. The barrier isn't clinical. It's logistical. Pharmacies can't reliably staff nurses on demand. Nurses don't have a modern platform that actually works for them. So patients end up in hospitals that don't need them.
Building the Marketplace, Not Just the App
Float's model is a marketplace - a full-stack platform connecting specialty pharmacies with vetted nurses to deliver medications directly to patients' homes. The platform handles scheduling, nurse credentialing, clinical documentation, and insurance invoicing. Not just the front end. The entire workflow that pharmacy providers had been stitching together manually with phone calls and spreadsheets.
The clients it landed are not a soft portfolio. CVS Health. Optum. Option Care Health. Walgreens through Alliance RX. Kroger. Kabafusion. Soleo Health. These are the largest names in specialty pharmacy, and they came to Float because Float could actually staff a nurse within minutes of a request - not days, not weeks. That 98-100% weekly staffing rate isn't a marketing number. It's the thing pharmacies had been quietly desperate for.
"Expanding access to this type of care would have a huge impact on patient outcomes, not to mention the burnout of my nurse friends exhausted by long shifts and juggling priorities. Float has proven successful in doing exactly that."- Ryan Johnson
Y Combinator and the $15 Million Argument
Float joined Y Combinator's Winter 2022 batch - the classic signal that a company has something worth compressing hard and fast. YC's endorsement opened doors, but it was the operational track record that closed them. By the time Canvas Ventures led Float's $10 million Series A in March 2024, the company had completed 19,000 visits with a 97% staffing rate. Concrete proof in an industry where proof is everything.
Mike Ghaffary from Canvas joined the board. Wave Capital, Burst Capital, and Also Capital participated in the round. So did a contingent of tech executives who aren't usually found in home healthcare - Instacart co-founder Max Mullen, Yelp COO Jed Nachman, and former Yelp VP of Marketing Brian Osborn. Total funding reached $15 million. The home infusion market these investors are backing is worth more than $15 billion, and 20% of infusions are projected to shift to the home setting.
The Nurse's Perspective on Healthcare Technology
What distinguishes Ryan from the average digital health founder is that he has pushed a medication cart. He has triaged a waiting room. He has held a patient's hand while administering an IV in a hospital corridor at 3am and then watched that same patient wait three months to schedule the next routine infusion at a clinic. That clinical perspective shapes how Float actually works.
The platform is built around what nurses need - flexibility, fair compensation, clinical tools that don't fight them. Float's marketplace lets nurses choose assignments that fit their schedules, access detailed patient profiles and medication protocols in advance, and document visits through the platform without drowning in paperwork. The 56% nurse retention rate isn't an accident. Neither is the fact that the company's weekly staffing rate rarely dips below 98%.
Before Float: The Long Runway
Ryan's path to founding Float wasn't a straight line from nursing school to startup. He spent a decade as a lifeguard with the Oceanside Fire Department before pursuing nursing, giving him an early foundation in high-stakes emergency response. He earned his BSN through the University of Virginia's accelerated second-degree program, then moved to San Diego and into the ER.
Alongside his clinical career, Ryan also co-founded a coffee roasting company with online sales and delivery - a detail that speaks to an entrepreneurial instinct that was always there, waiting for the right problem. The right problem turned out to be one he had watched every day for two decades.
By the time Float launched, Ryan had been an Emergency Medical Technician, a lifeguard, a bedside nurse, a clinical educator, and a coordinator for one of UC San Diego's most complex patient populations. He brought all of it into building a company that is - at its core - a care delivery system designed by someone who has actually delivered care.
"We're excited to join the ranks of innovative startups that have emerged from YC. We're already leveraging this opportunity to further our mission of making healthcare less costly, more accessible, and more convenient for everyone - from patients to nurses to hospitals to payers."- Ryan Johnson, on joining Y Combinator W22
What's at Stake
The numbers that frame Float's opportunity are not small. Specialty medications now account for 53% of all pharmaceutical spending. Home care costs 8 to 12 times less than hospital administration of the same treatments. And yet the infrastructure to deliver those medications at home - reliably, compliantly, at scale - barely existed before Float started building it.
By 2026, Float operates across nine states and has crossed 86,000 completed home visits. The company has demonstrated that medication completion rates improve by 180% when patients receive care at home compared to standard home infusion alternatives. That is not a minor efficiency gain. It is a fundamentally different outcome for patients with chronic illness.
Ryan's stated aspiration is to make this kind of care the default - not the exception - for everyone who needs it. Float's platform is designed to become the routing layer for all non-hospital specialty care in America. For an ER nurse who spent twenty years watching the wrong patients fill hospital beds, that's a very specific kind of ambition.