Quick answer: athenahealth and Waystar are not substitutes. athena is a network PM and EHR with native RCM. Waystar is a clearinghouse and payments platform. Keep athena. Do not rip-and-replace the PM to get AltitudeAI. Choose Waystar only as a claims rail or module beside athena, and only if your clearinghouse strategy requires it.
Inclusion criteria: Head-to-head on deployment model, EHR fit, payer coverage, and whether you must replace a clearinghouse or BPO.
Honest limitations: Substrate does not replace a clearinghouse, EHR, coder, or patient-billing platform. It automates post-submission AR. Claim status includes denial root-cause analysis (eligibility, records, medical necessity, wrong route), not just a 277 code or an 835 variance. Clinical edge cases still go to staff. Coding, CDI, and patient-facing billing are out of scope.
At a glance
Where athenahealth wins
- The system of record for scheduling, charges, and native RCM worklists
- Network effects across athena groups (payer rules, edits, marketplace)
- Kick-code denial queues and data-queue downcodes your team already runs
Where Waystar wins
- A dedicated 837/835 network and AltitudeAI if that is the chosen rail
- Remit and recoupment modules some athena groups still want beside the PM
- KLAS-cited clearinghouse scale — as a rail, not a PM
Also consider Substrate
Also consider Substrate when the gap is post-submission follow-up on the current PM: live in days, EDI and portal coverage across 3,500+ payers, PM writeback with a video audit trail, and denial root-cause analysis as part of claim status (eligibility, records, medical necessity, or wrong route) rather than a 277 code or an 835 variance alone. Substrate does not replace a clearinghouse, EHR, coder, or patient-billing platform. Stay on athena. Keep Waystar or Availity if that is the 837 path. The overlay writes status and the denial root cause back to athena worklists instead of asking billers to live in payer portals after the 277.
Research sources
athenahealth network RCM materials, Waystar clearinghouse pages, and operator guides on athena denial worklists. Confirm whether Waystar is even in the clearinghouse contract before you compare modules.