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Avutometinib plus dafacitinib for KRAS-Mutated Recurrent Low-Grade Serous Ovarian Cancer

As of February 2026, MARA’s assessment finds Avutometinib plus dafacitinib’s reimbursement risk concentrated in cost effectiveness and quality of life, with care pathway integration a strength; the current MARA Rating and full rationale are available in the report.

The assessment also weighs resource use and cost implications: what the drug adds to, or removes from, the wider bill beyond its own price — administration, monitoring, hospital time. The strength recorded in care pathway integration carries weight because that domain asks how the drug fits into the way care is organised today; a treatment that demands new infrastructure or displaces an established pathway faces extra scrutiny.

Oncology

This rating sits within MARA’s Oncology coverage, alongside 153 other independently assessed treatments in the same area.

What payers will ask

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

The evidence from the RAMP-201 cohort indicates a confirmed objective response rate (ORR) of 44% in 57 adults with KRAS-mutated recurrent low-grade serous ovarian cancer. However, the lack of a head-to-head comparison against standard of care (SOC) limits the ability to conclude superiority. The FDA’s accelerated approval based on ORR and duration of response (DOR) suggests some efficacy, but the absence of comparative data against SOC results in a B++ rating.

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

There is no published cost-utility analysis or incremental cost-effectiveness ratio (ICER) for the combination of avutometinib and defactinib. The only cost information available is the wholesale acquisition cost (WAC) of $48,500, which does not provide sufficient evidence for cost-effectiveness. Therefore, a C rating is warranted.

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

No HRQoL data or validated measurement instruments were reported for the RAMP-201 cohort. Although the RAMP-301 trial plans to collect HRQoL data using validated tools, the absence of any reported HRQoL outcomes in the current evidence leads to a C rating.

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

The FDA label reports a range of adverse reactions, with the most common being nausea (74%), diarrhea (68%), and fatigue (72%). Serious adverse reactions occurred in 32% of patients, with a fatality rate of 3.6%. Despite these concerns, the overall safety profile is manageable, leading to a rating of A+.

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

The RAMP-201 trial was a single-arm study without a direct comparator to SOC, which limits the ability to assess comparative efficacy. The upcoming RAMP-301 trial is designed to compare the combination against SOC, but currently, the lack of head-to-head data results in a B++ rating.

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

The trial population is well-defined, including 57 adults with measurable KRAS-mutated recurrent LGSOC. However, the representativeness may be limited due to specific exclusion criteria. Overall, the population is adequately characterized, leading to an A rating.

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

The treatment can be integrated into existing pathways with minor adjustments, as it involves oral administration of both agents. The monitoring requirements are clearly defined, indicating that integration into clinical practice is feasible with manageable changes.

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

The WAC of $48,500 is known, but there are no detailed analyses of the broader resource implications or budget impact. The lack of comprehensive cost data leads to a B rating, indicating potential concerns about affordability.

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

The evidence is primarily derived from a single-arm phase 2 trial with no head-to-head comparisons. While the trial design is acceptable, the reliance on a single study and the pending confirmatory trial introduce some uncertainty, resulting in a B++ rating.

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

There are notable uncertainties regarding the long-term clinical benefit and cost-effectiveness due to the lack of comparative data and pending confirmatory trials. While the trial design includes plans for interim analysis, the overall uncertainty leads to a B+ rating.

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