Independent Market Access and Reimbursement Risk Assessment.

Built by former payers, HTA reviewers, and Industry Experts. 

Belumosudil for chronic Graft-Versus-Host Disease After Failure of Prior Systemic Therapy

As of June 2026, MARA’s assessment finds Belumosudil’s reimbursement risk concentrated in resource use and cost implications, with patient population and subgroups a strength; the current MARA Rating and full rationale are available in the report.

The assessment also weighs quality of life: whether the trial benefit shows up in patients’ daily lives, not only in the clinical endpoints. The strength recorded in patient population and subgroups carries weight because that domain asks how closely the trial population matches the patients who would receive the drug in practice; payers often restrict funding to the groups where the evidence is strongest.

Immunology

This rating sits within MARA’s Immunology coverage, alongside 29 other independently assessed treatments in the same area.

What payers will ask

Is the clinical benefit the kind payers reward? — Clinical effectiveness

The evidence indicates comparable efficacy to existing options, as the pivotal ROCKstar trial demonstrated a 75% overall response rate, but it did not randomize against a standard-of-care control. This limits the certainty of superiority claims. The EMA assessment supports these findings with similar response rates, but the lack of direct comparative data against standard treatments results in a B++ rating.

Does the economic case hold at the expected price? — Cost effectiveness

The NICE appraisal suggests that belumosudil is likely cost-effective, with ICER estimates ranging from £2,976 to £15,226/QALY under various scenarios. Although there is significant uncertainty in the estimates, the overall assessment indicates a defensible position for cost-effectiveness, justifying an A rating.

Is there quality-of-life evidence payers weigh? — Quality of life

The primary HRQoL evidence is based on the modified Lee Symptom Scale, which shows some symptomatic benefit, but lacks direct utility measures like EQ-5D. While there are indications of patient-reported improvements, the absence of robust utility data and reliance on symptom scales leads to a B+ rating.

Does the safety profile hold up for payers? — Safety and Adverse Effects

Short-term safety data are well characterized, with common adverse events documented. The safety profile appears acceptable, with manageable adverse effects. However, long-term safety remains uncertain due to the non-comparative nature of the data, leading to an A rating.

Was the drug compared against what payers expect? — Comparator Selection

The pivotal study did not compare against standard-of-care treatments but rather between different dosing schedules of belumosudil. While the comparator landscape includes relevant therapies, the lack of direct head-to-head trials against standard care limits the robustness of the evidence, resulting in a B++ rating.

Is the population defined the way payers need it? — Patient Population and Subgroups

The trial population is representative of the intended patient population with chronic GVHD, and there are analyses of relevant subgroups. The evidence supports the use of belumosudil in heavily pretreated patients, justifying an A+ rating.

Does the drug fit how care is delivered and paid for? — Care Pathway Integration

Belumosudil is an oral outpatient therapy, which facilitates integration into existing care pathways. While monitoring requirements exist, the overall integration appears manageable, leading to an A rating.

Are the wider system costs understood? — Resource Use and Cost Implications

The economic implications of belumosudil are significant, with the potential for high resource use due to monitoring and management of interactions. However, the oral administration may reduce some costs associated with infusion therapies. This mixed impact leads to a B+ rating.

Would the evidence survive payer scrutiny? — Evidence Quality and Robustness

The evidence base includes a pivotal trial and supportive real-world data, but the reliance on non-comparative studies and the absence of randomized controlled trials against standard care introduce uncertainty. This leads to a B++ rating.

How exposed is the case to uncertainty? — Uncertainty, Sensitivity, and Broader Impacts

There is significant uncertainty regarding the comparative effectiveness and cost-effectiveness of belumosudil, particularly due to the variability in ICER estimates. While the treatment addresses an unmet need, the uncertainty surrounding its broader impacts leads to a B+ rating.
This rating replaces the earlier February 2024 rating of the same drug and indication — still on the record here.

Be alerted when this rating changes:

Sample two-page MARA Rating report for the fictional drug Samplinib: the rating with its decision record, and the ten graded payer questions with the reasoning behind each
Every MARA rating is delivered as a two-page reasoned report (sample, fictional product) — see it in full

Public record

The entries below are official decisions and assessments concerning this drug and indication, listed with their dates as a matter of record. The assessment on this page reflects the evidence available as of its date.

  • 29 January 2026 — European Union (CHMP), regulatory opinion: positive opinion for chronic graft-versus-host disease after prior systemic therapy; European Commission decision pending. official record
Full Legal Disclaimer and Usage Terms

The MARA Rating® is an independent opinion of a drug’s market access pharma risk profile and is provided for informational purposes only—not as investment, medical, legal or any other type of advice. See our full disclaimer here.