Should all patients diagnosed with B12 deficiency get a baseline EGD?

It is important to determine the cause of B12 deficiency. The majority of cases are due to pernicious anemia (atrophic gastritis and lack of intrinsic factor), I presume this question relates to that group. If there is another cause such as intestinal malabsorption or bacterial overgrowth, this does not apply.

If a diagnosis of pernicious anemia is made, baseline EGD is indicated to determine the extent of atrophic gastritis and exclude gastric carcinoma or carcinoid, both of which occur with in...