Bundled payment programs for total knee replacement live and die on PROMs completion. Under the CMS Comprehensive Care for Joint Replacement Model, CMS pays for the episode based on a 90-day window that includes a pre-op KOOS or WOMAC baseline and matched post-op scores at 90 days, six months, and one year. Miss any of those windows on more than a small share of the panel and the risk adjustment quietly stops working in the hospital's favor. That pressure is why the PROMs platform that a hip-and-knee service line picks in 2026 matters more than most vendor pages let on. For deeper background see our FHIR coverage for US healthcare, which sits next to the medical-form work.
The six platforms below are the ones you actually hear named when orthopedic service line leads compare notes. Each has a different center of gravity: some are ortho-specific, some are general PROMs runtimes with a strong ortho template library, and one or two are FHIR-native tools that treat KOOS and WOMAC as ordinary Questionnaire resources. That difference matters when the same PROMs data has to feed a bundled-payments reporting job that already sits in a FHIR store.
Force Therapeutics
Force Therapeutics is the ortho-specialist most often shortlisted for bundled payments. Its content library ships with KOOS, WOMAC, VR-12, and the CMS-mandated PRO-PM instruments already loaded and scored. The workflow templates are tuned to the CJR and BPCI-Advanced timelines, which cuts the setup work for a hospital that wants to be live in a single quarter. The trade-off is that the extraction into a FHIR store is a downstream job rather than the primary output. Service lines that plan to feed a warehouse or a hospital-wide FHIR server should budget for the integration layer.
A FHIR-Native SDC Runtime
Teams building on native FHIR often reach for an engine like Formbox because the scoring rules and extraction into Observation resources live in the same runtime, avoiding a second scoring service. That property matters most when the same PROMs data needs to move between the ortho service line, the analytics warehouse, and a payer-facing quality report without a translation step in the middle. For a hospital that already runs a FHIR platform, the browser sandbox at form-builder.aidbox.app is a quick way to see whether the KOOS and WOMAC instruments render and score the way the service line expects before any procurement conversation. Delivery channels are usually opinionated: tools like Force Therapeutics and PatientIQ bake in ortho-specific templates, while general-purpose SDC engines let you compose PROMs from a shared Questionnaire catalog and reuse the extraction across SMS, email, and portal.
PatientIQ
PatientIQ is the closest peer to Force in the orthopedic bundled-payments segment. Its strength is registry-quality reporting, and its ortho content library covers the mandated instruments plus a good set of supplementary joint-specific measures. Service lines that already contribute to the American Joint Replacement Registry tend to shortlist PatientIQ because the reporting overlap is high.
Feedtrail
Feedtrail is broader than ortho, and its PROMs coverage grew as the platform expanded from experience surveys into outcomes. The fit for bundled payments is real but usually secondary to its use for the broader patient-experience program. Service lines that want one vendor for both experience and outcomes lean here.
HAPI FHIR SDC with an Ortho Template Layer
The build-your-own option. HAPI FHIR ships an SDC-capable Questionnaire module, and a hospital team with FHIR engineering can layer KOOS and WOMAC templates on top with the scoring rules encoded as SDC calculated expressions. The licensing line is zero. The operational line depends on the team's existing HAPI ownership and the appetite for maintaining the scoring rules in-house across instrument version updates.
REDCap With an Ortho Instrument Library
REDCap remains the pragmatic choice for hospitals that already run academic ortho registries. Its instrument library covers KOOS and WOMAC, its scheduling is more capable than most people give it credit for, and its export tooling can feed a downstream FHIR pipeline. The gap is the patient-facing polish: the REDCap survey UI is functional rather than modern, and completion rates on smartphone reflect that.
How Ortho Service Lines Should Pick
In the FHIR-native camp, tools like Formbox handle the full SDC IG including population and extraction, which is the piece most engagement-first platforms leave to a separate integration engine. For a service line whose reporting stack is already FHIR-based, that property compresses the integration cost. For a service line that wants a turnkey ortho product with the CJR timeline built in, Force or PatientIQ stay ahead. The medical form builders that handle USCDI fields right list covers the tools once you know which lane you are picking in, and the ambulatory care buyer guide covers the adjacent outpatient decision.
