No ambiguous genitalia and transgender is not synonymous. Ambiguous genitalia is a medical term which encompasses a large variety of conditions were the external sexual features are not properly developed. Transgender is a layman term for just one sub category of ambiguous genitalia.
Next Steps
Ambiguous genitalia is usually treated by a Pediatric urologist. Treatment usually commences in childhood itself. it includes a battery of tests to define the type of ambiguous genitalia. Some of them need medical management. Most of them require surgical procedure (s). But yes it so treatable.