First, the doctor must take into consideration the law in his or her community. In the United States, each state has their own legal policy regarding contraception and abortion requested by minor patients. An up to date (January 2012) tabulation of these individual state laws can be found in Guttmacher Institute's "An Overview of Minors' Consent Law
www.guttmacher.org/statecenter/spibs/spib_OMCL.pdf
If a physician is confronted with a minor patient who makes such requests and the doctor is unwilling to accept the requirements set by law or has moral reasons against the request, then the patient should be referred elsewhere.
Most states require parental approval or parental notification for abortion. Some states, currently, have enforcement of their laws enjoined permanently or temporarily by court order so that the policy regarding parental consent or notification is not in effect. This means that the minor is still considered by current law to have the capacity to make her own decisions in this matter.
If the minor patient making the request " is the daughter of one of your friends who you work with in the hospital/clinic" whether or not the friend should be notified about the request should be decided by the wishes of the patient and following the current legal requirements. ..Maurice.