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Med-RLVR: Emerging Medical Reasoning from a 3B base model via reinforcement Learning

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arxiv 2502.19655 v1 pith:GDCMPX54 submitted 2025-02-27 cs.CL cs.AI

Med-RLVR: Emerging Medical Reasoning from a 3B base model via reinforcement Learning

classification cs.CL cs.AI
keywords reasoningrlvrmedicalbasecodingdomainsmed-rlvranswering
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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Reinforcement learning from verifiable rewards (RLVR) has recently gained attention for its ability to elicit self-evolved reasoning capabilitie from base language models without explicit reasoning supervisions, as demonstrated by DeepSeek-R1. While prior work on RLVR has primarily focused on mathematical and coding domains, its applicability to other tasks and domains remains unexplored. In this work, we investigate whether medical reasoning can emerge from RLVR. We introduce Med-RLVR as an initial study of RLVR in the medical domain leveraging medical multiple-choice question answering (MCQA) data as verifiable labels. Our results demonstrate that RLVR is not only effective for math and coding but also extends successfully to medical question answering. Notably, Med-RLVR achieves performance comparable to traditional supervised fine-tuning (SFT) on in-distribution tasks while significantly improving out-of-distribution generalization, with an 8-point accuracy gain. Further analysis of training dynamics reveals that, with no explicit reasoning supervision, reasoning emerges from the 3B-parameter base model. These findings underscore the potential of RLVR in domains beyond math and coding, opening new avenues for its application in knowledge-intensive fields such as medicine.

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Cited by 9 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score.

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    cs.CV 2026-04 unverdicted novelty 6.0

    Infection-Reasoner, a 4B VLM, reaches 86.8% accuracy on wound infection classification while producing rationales rated mostly correct by experts, via GPT-5.1 distillation followed by reinforcement learning.

  2. HEALing Entropy Collapse: Enhancing Exploration in Few-Shot RLVR via Hybrid-Domain Entropy Dynamics Alignment

    cs.LG 2026-04 unverdicted novelty 6.0

    HEAL mitigates entropy collapse in few-shot RLVR by selectively adding general-domain data and aligning trajectory-level entropy dynamics, matching full-shot performance with 32 target samples.

  3. Improving Clinical Diagnosis with Counterfactual Multi-Agent Reasoning

    cs.CL 2026-03 unverdicted novelty 6.0

    A new counterfactual multi-agent framework improves LLM diagnostic accuracy by quantifying confidence shifts from edited clinical findings and guiding specialist discussions.

  4. Rubrics as Rewards: Reinforcement Learning Beyond Verifiable Domains

    cs.LG 2025-07 unverdicted novelty 6.0

    RaR uses aggregated rubric feedback as rewards in on-policy RL, delivering up to 31% relative gains on HealthBench and 7% on GPQA-Diamond versus direct Likert LLM-as-judge baselines.

  5. Reasoning Before Translation: Enhancing Legal Machine Translation with Structured Reasoning

    cs.CL 2026-07 conditional novelty 5.0

    On Swiss legal translation, reinforcement learning with a ChrF reward improves small open models more than supervised fine-tuning, but frontier reasoning models still score higher.

  6. RareDxR1: Autonomous Medical Reasoning for Rare Disease Diagnosis Beyond Human Annotation

    cs.AI 2026-06 unverdicted novelty 5.0

    RareDxR1 is an LLM trained via knowledge internalization, reflection-enhanced sampling, and curriculum RL to perform open-domain rare disease diagnosis from raw notes without human-labeled phenotypes.

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    Gated synthetic augmentations of a 10-task human base substitute for ~87 extra human RLVR tasks on aggregate held-out pass@1, with cost-adjusted trade rate ρ_cost in [1.4×, 11.6×].

  8. UniReason-Med: A Shared Grounded Reasoning Interface for 2D-to-3D Transfer in Medical VQA

    cs.CV 2026-06 unverdicted novelty 4.0

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    cs.LG 2026-06 unverdicted novelty 4.0

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