Procedure documentation
As long as the procedure is adequately documented, yes, you may code from a handwritten procedure note. "Adequately documented" will include legibility of the note, date of service, clear indication for procedure, clear description of what was done (not just a title), clear indication of who is performing the procedure and the provider's signature and date.
I have coded a procedure (e.g. laceration repair) when it is only handwritten and not dictated/transcribed.
BUT ... most hospitals require a dictated operative note for anything requiring anesthesia and/or not done at bedside.
Hope that helps.
F Tessa Bartels, CPC, CEMC