Built by a surgeon who ran the workflow.Not a technology startup that discovered healthcare.
Sydra is the software arm of Kronos Health. Kronos Health is a working revenue cycle management operation founded by Dr. John M. Abrahams, MD, a board certified practicing neurosurgeon in New York.
The software wasn't built first. The billing operation was built first. Dr. Abrahams built the IDR process for his own neurosurgical practice, trained an RCM team on it, and then built Sydra to make the documentation step faster for billing teams who wanted to run the same workflow in house.
First: the determination library that powers Sydra's market rate citations was built from a working IDR practice, not scraped generically from CMS data.
Second: the clinical narrative framework that drives Sydra's AI generation was built by a surgeon who writes operative notes, not by a prompt engineer who read about them.
Team
Dr. John M. Abrahams, MD
Founder, Board Certified Neurosurgeon
Fellow, American Association of Neurological Surgeons (FAANS) · Past President, Brain and Spine Surgeons of New York · Founder, Kronos Health
Dr. John M. Abrahams, MD is a practicing neurosurgeon in New York. He built the original NSA IDR submission process for his own neurosurgical practice after the No Surprises Act took effect in 2022. The process produced consistently better outcomes than the contingency attorney model the practice had used previously. His role in Sydra: the clinical coding framework, the determination library curation criteria, and the clinical necessity narrative structure are all built from his experience as a practicing surgeon. He reviews all medical content published by Kronos Health.
Heisha Rivera
Director of Revenue Cycle Operations · Kronos Health
Heisha leads the RCM operation at Kronos Revenue and the Sydra + Kronos Support team. She manages the specialists who handle Tier 2 Sydra escalations, monthly account reviews, and the Kronos Full Service client relationships.
Chelsea
Software and Integrations Lead
Chelsea leads Sydra's software development and integration architecture. She handles ModMed, Stedi, and EMR integration questions on demo calls and manages the product roadmap. EMR integration questions go to Chelsea.
Why us
Why this origin matters for your practice.
Sydra isn't the first software platform to claim it can prepare IDR submissions. It's the first one built by a practicing neurosurgeon whose team files IDR claims every day on the same platform. That's the reason we ask you to run the demo on a real denied claim, not a sample claim.
Built on Claude via Amazon Bedrock · Built to support HIPAA safeguards · BAA on request · ModMed and Stedi integrations · SOC 2 aligned, report under NDA · Security details
Sourced references
- 1. CMS Federal IDR Q1/Q2 2025 Public Use FileReleased January 21, 2026cms.gov/nosurprises/policies-and-resources/reports
- 2. Georgetown University CHIR · Health Affairs webinarMarch 2026 — 3.4 million disputes through June 2025; 88% win rate; median award ~4.5x in network rate
- 3. Zelis — NSA IDR Eligibility ChallengesMarch 2026 — 44% of 2024 IDR cases challenged as ineligible by non initiating party
- 4. ACEP analysis of CMS data~10% of eligible claims estimated to reach IDR arbitration
- 5. Brookings Institution NSA Arbitration DatabookApril 2026brookings.edu/articles/no-surprises-act-arbitration-databook
- 6. ACR — Providers Prevail in Vast Majority of IDR ClaimsJanuary 2026 — 88% of disputes found in provider's favor; 87% of awards exceeded QPA
- 7. No Surprises Act: Public Law 116-260, Division BB, Title I
- 8. Federal IDR regulations: 45 CFR Part 149ecfr.gov/current/title-45/subtitle-A/subchapter-F/part-149
- 9. CMS No Surprises Act overviewcms.gov/nosurprises
- 10. HHS HIPAA for professionalshhs.gov/hipaa/for-professionals