News and Views for Healthcare Accreditation Professionals

CMS: OR Humidity Rules!

CMS still holds hospitals to NFPA 99 (,, and for humidity limits in anesthetizing locations to: 35-60%. The more liberal ANSI recommendation of a lower limit of 20% is NOT CMS approved. Serious findings have been written by CMS when the humidity is out of range and surgery continues.

Addendum:  Recently it was made known that Joint Commission will survey the acceptable humidity range as 20%-65%, but caution hospitals that CMS will hold hospitals to the 35%-60% range per NFPA 99.


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