Some health care insurers and employers want to keep medical costs in check through "physician payment reform," or paying doctors based on quality measures and episodes of care, rather than for services. "There is an emerging consensus between all payers that we have to agree to a common set of metrics," said Cigna's chief medical officer. But physician organizations say that basing quality data solely on insurance claims does not reflect true quality data and does not address the problem of how to assess quality when patients see more than one doctor.

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