Yes, there is a trend in the medical community to forego the endoscopy/biopsy and grant an official celiac diagnosis based on high tTG-IGA antibody scores alone. This trend started in the UK and is spreading to the USA medical community. And yes, 5-10x the normal level is what I have been seeing as the threshold as well. Here is the relevant section dealing from the article above dealing with the importance of the total IGA test being ordered. See the embedded attachment.

Ok, interesting. Not what I was thinking that meant. I'm reading the article and trying to understand. I see this “According to the latest research, if the blood test results are at certain high levels that range between 5-10 times the reference range for a positive celiac disease diagnosis, it may not be necessary to confirm the results using an endoscopy/biopsy” My IgG is 90, which is 6 times. So to me that means it's highly likely I do have it. 

It just means you aren't IGA deficient, i.e., that IGA deficiency cannot have given you artificially low scores in the individual IGA celiac antibody tests. This is explained in the article Scott linked above.

Normal range: 70 - 400 mg/dL, a little above middle of the range. So what does that mean? Thank you! I will check out that page you linked. Appreciate it! 

Well, the only thing I would conclude with would be, if you choose not to trial the gluten free diet, is to encourage you to get periodically tested, either antibody blood tests or the biopsy or both. I think it something that needs to be monitored.