It's more of a requisite first step than milestone, but the Department of Health and Human Services sent the proposed rule for meaningful use Stage 3 to the Office of Management and Budget.

There’s precious little detail in these submissions, but HHS foreshadowed the major problems it intends to address with this next, and perhaps final, stage of the federal EHR Incentive Program.

"Stage 3 will focus on improving health care outcomes and further advance interoperability," according to OMB’s website. "Stage 3 will also propose changes to the reporting period, timelines and structure of the program, including providing a single definition of meaningful use. These changes will provide a flexible, yet, clearer framework to ensure future sustainability of the EHR program and reduce confusion stemming from multiple stage requirements."

The Office of the National Coordinator for Health IT also submitted a rule to OMB proposing a new 2015 Edition Base EHR definition, as well as modifications to the ONC Health IT Certification Program, "to make it more broadly applicable to other types of health IT health care settings and programs," another OMB web page states.

ONC’s proposed rule would establish capabilities and criteria, and specify standards and implementation specifications that EHR makers must meet, to "at a minimum support the achievement of meaningful use" for customers including eligible hospitals and eligible providers looking to attest and receive incentives.

OMB ranks both proposed rules as “major” but the in the form’s legal deadline field the status is none.
 
Stage 3 is expected to begin in 2017.