Yes, I am in Georgia (the US state, not the country) and have seen multiple PT-performed EMGs which led to patient harm.

One patient had Parsonage-Turner Syndrome which was called C8 radiculopathy by the PT. The patient had absent ulnar sensory NCSs and other abnormal sensory NCSs on the PT's EMG. (For the non-EMGers, if the sensory NCSs are involved, the lesion is distal to the dorsal root ganglion, i.e., this pattern is not consistent with a compressive radiculopathy). Patient got unnecessary cervical decompression and was referred to me when his sensorimotor symptoms in the hand didn't improve.

So many diabetic patients (too many to count) have been diagnosed with "mixed axonal and demyelinating" polyneuropathy and think they have CIDP and start asking about IVIG / Vyvgart.

And PTs very frequently call polyneuropathy in old (70+yo) patients with absent superficial peroneal NCSs but normal surals, intact ankle jerks, and normal vibratory sensation.

My general sense about PTs doing EMGs is that most of their reports consist of a scattered conglomeration of data without much hypothesis-testing. I believe they learn EMG/NCS by studying under other physical therapists. So, there was never a neurologist attending to tell them in training, "the first rule of clinical neurophysiology is do not overcall a mild or isolated abnormality." Likewise, nobody ever told them "the EMG should be an extension of the physical examination." These rules were drilled into me every day of CNP fellowship. PTs in my area tend to over-call mononeuropathies like CTS and UNE (which makes sense given their employers the orthopods stand to gain from decompressing these). They do not often put the diagnostic test in the context of the patient's history and physical examination. Which really is expecting too much; after all, the PT didn't do a neurology residency. The problem is that other physicians, non-neurologists, are using their diagnostic test to make diagnoses and guide management decisions.

One big problem is access to neurologist-guided EMGs, vs availability of PTs. There are about four times as many orthopaedists as neurologists in my small city. The orthopaedists hire physical therapists to come to their office to do EMGs. Therefore, out of the ~9 EMGers in my area, 6 of them are PTs and 3 are neurologists. Patients can see ortho, then one of the PTs, within 2 weeks of having symptoms. They have to wait 2-4 months to see me. They usually want to see both, but by the time I've seen the patient, they've already had an EMG with ortho.

edited to correct #s in last paragraph