Strange.... Altho it was close to a year ago, Quest told me they didn't do a CD57 and I had to go to labcorp. (out of area lab, but Insurance pd a % BECAUSE Quest -- the only covered lab did not do these).
If you have trouble getting this covered, it may help to call your insurance rep -- they are part of the hot shot team that hardsells your employer (or you) on their coverage. I had to call several times and write a few letters, but they ended up covering about 60% of my LLMD (who was not in network) and the CD57, since they could not find an in network Dr to help me.
There is no way you should have to cover their error and I would be sure to let them know that, in no uncertain terms.
Bit 1972: Acute and chronic tonsillitis, UTI, miscarraige, appendicitis, hypoglycemia, chronic neck pain w/ crushed vertibrae, chronic severe back pain, mitral valve prolapse, depression, resolution?
Bit Mother's Day 2007: Lyme, Babesia microti, hypothyroidism, EBV, HHV6, Parvovirus B19, low adrenals &misc other hormones, depression, anxiety, more of the above.