The expert opinion regards the criminal incident of the combined damage to health without legal features of the criminal co-participation. The authors use doctrinal law approach. Conclusions: 1) combined giving of the medical help does not mean the combined criminal damage to health; 2) commission of iatrogenic crime related with gross negligence maybe incriminated to offender if it was understandable for him that concrete breach of the rule may provoke the damage to health; 3) understanding of the possibility of criminal damage to health must be proved and motivated with help evidence.