Our situation was somewhat unusual but I found others who went through the same, or a vary similar situation.
After "reading" her chest Xray, she was told to return for the 3 day sputum collection. In addition, she was given an order to see a doctor not affiliated with St Luke's for a follow up exam and have the doctor submit the results directly to St. Luke's within 10 days.
I found a pulmonologist at a local hospital, made an appointment and corresponded with her explaining the situation, what I believed to best practice and the icd-10 code for the diagnosis. The pulmonologist insisted on the CT scan and after reviewing the scan gave my fiancée a Dx of TB. (Which you know from being in the field is not possible.)
Of course my fiancée FREAKED OUT and I was concerned that she was going to be mandated for treatment unnecessarily.
The scan and pulmonology report was sent to St Luke's as requested. My fiancée returned in 8 weeks for the sputum results, which was negative and she "passed" her medical. St Luke's gave her the CT scan and told her to take it to America with her.
At her point of entry (San Francisco) they took the medical envelope but she retained the CT Scan.
I just view this as bureaucratic incompetence, and have also discovered the financial relationship between MDs at the hospital where she saw the doctor and the Ct scan provider. (Finding other patients sent for unnecessary scans as there is a financial incentive.)
As you know, there are many causes for benign lung nodules. After breathing the daily garbage burns in the Philippines, I probably have a few.
I hope your wife can remain calm. It can be a confusing and frustrating process. I hope you and your wife have an easier path.
Best, Chris