how does vitamin b12 injection work Shots vs. IV Infusions: What is the difference? How to Give a B12

If you see blood enter the syringe this means you hit a blood vessel and you need to pull out and start over

The Mayo Clinic notes that even at therapeutic mega-doses, side effects are uncommon and mild: headache, nausea, diarrhea, fatigue, and a tingling sensation in extremities

Therefore, coders should: Verify payer-specific administration requirements Review NCCI edits Confirm medical necessity Validate modifier usage Confirm HCPCS drug codes Furthermore, many payers require detailed drug documentation before reimbursing high-cost injectable medications

If symptoms return before your scheduled injection, contact your GP to discuss your treatment schedule