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Whilst in conventional medical practice B12 deficiency is generally treated with intramuscular injections, it is generally accepted that oral (per os) administration at a high dose is as effective at improving B12 status

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Medical Coding for Injections in 2026: CPT Codes, Administration Routes, Documentation Guidelines, and CPC Exam Tips By Janine Mothershed CPC, CPC-I Key Takeaways Injection administration coding depends on the route of administration , the drug or substance administered , and the medical necessity documented in the record

These include diet, malabsorption, and some medical conditions

Any excess is typically excreted in the urine, lowering the risk of toxicity