LunaBill
LunaBill is a YC Fall 2025 (F25) company. Based in San Francisco, CA, USA. Team of 4.
About LunaBill
Summary
LunaBill builds AI voice agents that handle insurance claim follow-up for healthcare billing teams. The agents check payer portals, wait on hold, speak with payer representatives, draft and file appeals, and write every outcome back to the EHR, replacing the manual AR work that consumes the bulk of a billing team's day. Hospitals and revenue cycle management firms use LunaBill so their billers review results rather than chase claim status.
Business model
Contracted annual recurring revenue per customer.
Go-to-market
Healthcare billing teams and RCM firms are the buyers; LunaBill sells directly and converts prospects through pilots before moving them to paid contracts.
From the Y Combinator listing
AI Voice callers for healthcare billing teams
LunaBill is building AI Voice callers for healthcare billing teams. Insurance claim follow-up calls account for the 80% of the daily workload of a healthcare billing team, with each call averaging 30 minutes. Since our launch in July we are now at $764K in contracted ARR, of which $428K is live revenue and the rest will go live by January 2026. Our customers see a 10x increase in claims followed up per biller in the first week and we have converted 100% of pilots to paying customers. We have automated 50,000+ calls and signed partnerships with top healthcare leaders like UC health systems, Mayo, Experian Health and more. The founders have known each other for over a year. Suhail is a 2x founder, with 3+ years of experience building in healthcare including operating a medical billing company with 200+ healthcare clients. David founded Skiesoft, Taiwan’s biggest healthcare AI scribe company, used by 120k+ healthcare professionals. He also worked as a data scientist at UCSF, building models to audit medical-coding accuracy. Yash was a researcher at various hospital systems including Mayo Clinic.
Facts
- Healthcare / Healthcare -> Healthcare IT
- San Francisco, CA, USA
- 4
- Active
- Early
Founders (3)
- David Day
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