All attestations for 2014, regardless of how many years a provider has participated in MU or whether they are at stage 1 or stage 2, is for a 90 reporting period. Providers that have successfully attested in the past must report their 90 day period based on calendar quarters. First time attesters can report their 90 day period based on any continuous dates but must do so by October 1, 2014 to earn the incentive.
The proposed changes for the Modifications to the Medicare and Medicaid Electronic Health Record Incentive Programs for 2014 and Health Information Technology (ie, allowing providers to use 2011, 2014 CEHRT or a combination of both) have yet to be finalized therefore until they are, providers should proceed attaining MU under the current requirements.
Based on your scenario, that would mean your providers should attest to Stage 2 for 90 days in 2014 using 2014 CEHRT.
As Amazing charts has officially announced that they have attained Stage 2 certification there are no vendor limitations.
If you're still unclear on the requirements, CMS has a handy widget that provides a visual of your particpation timeline.
http://cms.gov/Regulations-and-Guidance/Legislation/EHRIncentivePrograms/Participation-Timeline.html Clear as mud. I have seen the questioned asked, but unclear of response. Can I still use Stage 1 attestation in 2014, after having done three years of Stage 1? It seems like that is the suggestion until I upgrade to AC Stage 2 version. If yes, do I attest for the entire year in 2015 like I have done in the past, or is it for a three month segment of 2014 in 2014.