An osseointegrated implant for an amputee includes a surgically implanted post-shaped orthopedic implant rigidly supported by patient bone, wherein the implant protrudes through overlying stump tissue to an external location for suitable attachment to a prosthetic limb or the like. A non-invasive electrical stimulation system provides controlled electrical stimulation at the implant-bone interface for achieving rapid and secure fixation by osseointegration in a significantly reduced rehabilitation time. The electrical stimulation system utilizes at least one and preferably multiple electrodes mounted externally onto the patient in close proximity to the implant-bone interface, with an external portion of the implant providing a second electrode. In one preferred form, the implant comprises a base structure of titanium or titanium alloy or the like, coated with a thin film of a highly conductive substance such as gold for improved electrical conductivity.