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B12 Testing : A blood test may check your levels to identify deficiencies

There's no separate ICD-10 code for severe iron deficiency anemia

And they're at higher risk for atrophic gastritis

Common, mild side effects: Pain, redness, or itching at the injection site Mild nausea or diarrhea Headache Temporary dizziness Rare but more serious reactions: Allergic reactions (rash, swelling, breathing difficulty) Heart palpitations Low potassium levels during rapid correction of severe deficiency Very rare cases of anaphylaxis requiring emergency care Seek medical attention immediately if you experience symptoms of a serious allergic reaction