A venous access port assembly (10) having a housing base (28) with a discharge port ( 16), a septum (14) and a cap (48). An interior reservoir (22) is defined by a well (30) in the housing base and a bottom (62) of the septum, and a passageway (20) extends from the reservoir through the discharge port (16). The housing base (28) is provided with radiopaque markings (60) on the bottom wall (44) thereof, including radiopaque indicia ( 70) that identify an attribute of the assembly (10) after its implantation and clearly appear on an X-ray of the patient in a manner informing the radiologist or technologist and the medical practitioner of that particular attribute.
