Many doctors are not adequately educated about the normal, intact penis and its growth and development from infancy through puberty. Many often recommend circumcision for every conceivable minor problem when only minor treatment, or even no treatment at all, is necessary.
For more information dispelling many of the common medical myths about the normal penis, see the following:
In particular, many doctors are concerned and may recommend circumcision if an intact boy is not retractable by a certain age. However, it is totally normal for a boy not to become retractable until the teen years, or even beyond. Even when non-retraction is a genuine issue for an older teen or adult, there are many solutions short of surgery. See:
For more information, please feel free to comment and I will answer to the best of my knowledge.