The question seems incomplete. But as per the facts written, it is not grievous hurt. There are eight situations laid down in section 320 of the Indian penal code, which causes grievous hurt. The taking out of blood forcibly by the doctor does not satisfy any of the eight conditions.

But yes, it can attract section 324 of IPC, if by cutting through any instrument or using an instrument as a means of weapon which causes death or deleterious to the human body, makes the degree of punishment higher.

For example, If the doctor knows that a person is deficient of haemoglobin, and he still forcibly took out blood from that person’s body, it can cause big harm to such person.