For igA info I'd review the overview at: www.ncbi.nlm.nih.gov/pubmedhealth/PMH00024
which shows the connection between IGA deficiencies and respiratory illness. Then review the study at: cvi.asm.org/cgi/content/full/9/6/1295
which states: Immunoglobulin A (IgA) deficiency is 10 to 15 times more common in patients with celiac disease (CD) than in healthy subjects.
The primary reason to get 'diagnosed' for Celiac disease/disorder/gluten intolerance is the know whether you must follow an absolutely strict gluten-free diet. Also, a diagnosis tells your primary care doctor to watch for the health problems associated with Celiac. However, you can do this 'watching' for yourself through your doctors by becoming educated about Celiac disease. Be pro-active about your health.
If you go for a 'second opinion' through Kaiser, then you'd likely want to go to a gastroenterologist, not an endocrinologist. And most gastroenterologists are not really on top of the latest information on Celiac's and gluten syndromes. You might check and see if you can find a Kaiser doc that sees a lot of Celiac patients for the best help. Typically,gastroenterologist will do multiple tests ending with endoscopy biopsies that may or may not show villi damage depending on how long ago Celiac's/gluten intolerance was triggered. Remember, just having the genes doesn't make a person Celiac - it has to be triggered by X amount of gluten exposure.
The gut issues from Celiac's can have endocrinology impacts. Thyroid's T4 conversion to T3 occurs in both the liver and the intestine so if the intestine isn't working properly a lot of people find they are short of T3 even though they may have plenty of T4 (which is why T4/T3 combos or natural thyroid like Armour may work better for Celiac hypothyroid patients issues.
If you've decided you are a Celiac, one of the most useful books I've come across recently is "Recognizing Celiac Disease' which gives detailed information about the vitamin and mineral deficiencies Celiac's can experience. It's helpful to have a fundamental understanding of Celiac's to get the best use from the book. You can get an idea about the book from the author's web site at: recognizingceliacdisease.com
I had to go 'outside the system' to find my own answers. I finally used Dr. Fine's gene and fecal tests at Enterolab.com to get gene tested. I was right - I carry a double gene that associated with gluten intolerance and am also sensitive to casein. So a strict GFCF diet is what I follow. Dr. Fine's articles are worth reading, too. My regular MD would never have found that I was Celiac/gluten intolerant, because I'm atypical. I had to go the gene route to really find out.
As far as respiratory illness, it's a good idea to insist on getting a Vitamin D test. I have to stay in the upper 25% of the D lab range to avoid respiratory illnesses. When I was first tested I was way below range so don't assume you are fine. It takes several months to bring D levels up as it's not a quick fix.
Lastly, Doctor's aren't perfect. There's an abundance of studies stating that there's a significant connection between type 1 diabetes and Celiac's disease. There's evidence that Immunoglobulin A (IgA) deficiency is much more common among Celiac's, If you are also reacting to gluten, then it would seem like a reasonable probability that gluten isn't good for your particular health situation. My personal view was why should I wait until my villi are severely damaged just so the MD can go "yes, you should avoid gluten..."
Dr. Fine has an excellent essay about the importance of early diagnosis of Celiac's before the villi are gone: www.celiac.com/articles/759/1/Early-Diagno
It's definitely worth reading for anyone who is wondering about the life long impact of Celiac's.
Hope this helps.