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Factors Influencing B12 Absorption Factors that can influence the absorption of vitamin B12 include stomach acid levels, intrinsic factor production, and individual variations in the digestive system
PMID: 22463691 | doi:10.1146/annurev-biochem-052110-115718 Mendias CL et al
Pernicious anemia occurs when the body cant absorb enough vitamin B12 from food because it lacks a protein in the stomach called intrinsic factor, caused by autoantibodies to intrinsic factor or parietal cells
In summary, after consideration of the public comments we received, we are finalizing our proposals without modification, to assign CPT codes 37254 through 37299 to the APCs and status indicators noted in Table 94
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