b12 injections cigna Cyanocobalamin Vitamin Injection 1000 mcg — Mountainside Medical Does Cigna cover vaccinations and
Description
Place of Service codes 19, 21, 22, 23, 24, 26, 51, 52, and 61 do not allow the physician to separately bill the injection administration code

This is a commonly referenced study from 1963 claiming a half-life of 5-6 days: nature.com/articles/198200a0 Although I would not cite it as an authority, the six-day half-life has also made it onto the B12 page in Wikipedia, seemingly unchallenged

[DOI] [PMC free article] [PubMed] [Google Scholar] 99

Tillemans et al., 2014

Thanks I am going to try and think of England
