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Mostly non-vegetarians who eat certain animal products like beef, fish, and chicken get vitamin B12 from them
Other oral medications may come with their own set of side effects
Measurement of serum methylmalonic acid should be used to confirm deficiency in asymptomatic high-risk patients with low-normal levels of vitamin B 12
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Claims billed with D50.9 are closely reviewed when clinical notes or laboratory results support a specific cause, such as blood loss, pregnancy, or malabsorption
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