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
Substrate ARC is an agentic denial and reconciliation platform for provider groups, hospitals, and health systems. Substrate combines all your systems and data sources across clearinghouses, payer portals, EMRs, lockboxes and more, to comprehensively support your billing team and enable you to work every single denial. Consider Substrate if:
- You need end-to-end denial management, from triage through remediation, and appeal filing, not just phone dispositions
- Your payer mix is portal-heavy (Medicare, Medicaid MCOs, specialty commercial)
- You want structured PM writeback and audit trails across status, appeals, and posting
- You prefer agentic automation over manual execution or offshoring and outsourcing (Substrate is listed in the Anthropic Connector Directory and publishes a public claim-status MCP.)
- You want to keep billing in house but make it fast and cost effective
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.