The tribunal found the doctor, on balance of probabilities, did not adequately review the patient between the Sunday and Friday.
There was no patient review or examination notes made.
But the tribunal said the failure to review the patient did potentially compromise her care and safety, but accepted the expert view sought that in this case, the patient's care was adequate.
"The tribunal was not satisfied that the practitioner's conduct was so seriously negligent ... as to warrant a disciplinary sanction," wrote tribunal chairwoman Maria Dew.
"However, the tribunal does not in any way wish to be taken as sanctioning such conduct."
But the tribunal found the doctor to be both negligent and brought, or likely to have brought discredit to the profession in the second charge.
"The practitioner did fail to return to hospital ... to supervise and provide appropriate support to the registrar ... while she was performing a Hartmann's procedure," Dew said.
"The failure to attend this acute and complex operation was a serious failure by the practitioner that does warrant disciplinary action."
The tribunal found that it was a "serious dereliction of duty" as consultant surgeon for the doctor not to attend.
The tribunal censured the doctor and ordered him to pay $20,000 as contribution to the costs and expenses of the tribunal and the PCC.