Dear Lauri,
I looked up your previous message. I assume that you Dad has had his stent out, and is otherwise doing well.
It is normal for a rib to be disturbed during open kidney surgery, probably more so during an ooen partial. The kidneys are located under the rib cage, and the ribs nead to be spread, (and sometimes one is removed) so the surgeon can get access to the kidneys.
Since your Dad had a partial I will assume that his kidney tumor was small, the surgical margins were clear of tumor, and the cancer had not spread beyond the kidney, and that he had had CT scans of his abdomen and chest around the time of his surgery to make sure that the cancer had not spread. If he has not had CTs, he should have them now; if he did have them at the time of surgery, he should have another set done six months after surgery. As long as the scans don't show that the cancer has returned, (and scans are being ordered periodically) your Dad should be fine with his urologist. Urologists are primarily surgeons, and do not have the training to administer post-surgical treatment that the oncologists do, but as long as your father needs no further treatment, he'll be fine with his urologist.
If follow-up scans are being done, and are clean, your father probably does not need an oncologist. Scans should be repeated periodically for the rest of his life. Kidney cancer has a nasty habit of occasionally recurring many years after successful surgery, but when it does this it is usually cureable by surgery if caught quickly. If there are ever any signs on his scans that the cancer has returned, he should see an oncologist that has experience in treating kidney cancer patients; he can find one near him by calling the Kidney Cancer Association at 800-850-9132. Kidney cancer is relatively rare, and many oncologists see few kidney cancer patients. Kidney cancer is also resistant to conventional chemo and radiation, but good treatments do exist, and will more likely be successful if directed by an oncologist with experience in treating kidney cancer patients.
There is an email support list specific to kidney cancer. See
http://cancerguide.org/kofaq/ to correspond with other caregivers and/or kidney cancer patients about treatment, doctors, etc.