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AetnaCommercial · Coverage · Medical Policy · Internal Medicine, General Practice, Hematology +2 moreMedium impact

Vitamin B-12 Therapy (CPB 0536, reviewed 2025-08-21)

Effective date
Not stated in the notice
Identified
Aug 19, 2026

Summary

Aetna covers intramuscular or subcutaneous vitamin B-12 injections as medically necessary only for members with current or previously documented B-12 deficiency and one of the listed diagnoses, including pernicious anemia, malabsorption syndromes, gastrectomy or small intestine surgery, certain neuropathies, dementia secondary to B-12 deficiency, metformin-related deficiency, methotrexate or pralatrexate use, and pemetrexed (Alimta) use. Aetna considers vitamin B-12 injections for all other indications experimental, investigational or unproven, including autism, depression, fibromyalgia, migraine prophylaxis, and weight loss. Homocysteine measurement is medically necessary in persons with borderline vitamin B-12 deficiency when the results will impact the member's management, while holotranscobalamin measurement for diagnosing B-12 deficiency is listed as unproven.

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What to do

Action · 7 steps
01Billing team: Bill intramuscular or subcutaneous vitamin B-12 injections (HCPCS J3420, cyanocobalamin up to 1000 mcg, covered for intramuscular or subcutaneous use only) only for the diagnoses and conditions the policy lists as medically necessary, and only for members with current or previously documented B-12 deficiency.
02Billing team: Expect injections given for more than 2 to 3 months to be subject to review to ascertain whether the deficiency or abnormalities have improved and whether continued treatment is medically necessary.
03Billing team: Expect requests for injections more frequent than the standard schedule of 1,000 mcg daily for 5 days, then 1,000 mcg weekly for 4 weeks, followed by 1,000 mcg every 1 to 3 months for maintenance, to be subject to medical review.
04Billing team: For members receiving pemetrexed (Alimta), the source states they must receive one intramuscular injection of 1,000 mcg vitamin B-12 during the week preceding the first dose and every 3 cycles thereafter.
05Billing team: Do not bill perineural vitamin B-12 injections for brachial plexus injury or other peripheral neuropathies, because CPT 64450 is not covered for that use.
06Billing team: Do not bill vitamin B-12 injections for indications listed as experimental, investigational or unproven, such as autism, depression, fibromyalgia, migraine prophylaxis and weight loss.
07Billing team: Check each member's benefit plan, because most Aetna plans exclude nutritional supplements and Aetna does not cover charges for oral vitamins that can be purchased without a prescription under those plans.

Codes mentioned

830906445096372J3420J3425J8610J8611J8612J9255J9260J9292J9294J9296J9297J9305J9314J9322J9323J9324B70.0D51.0D52.0D53.1D53.9E53.8E71.120E72.11G62.1G99.0H46.3K31.1K31.5K63.2K63.89K91.1K91.2Z98.0

Original notice

Vitamin B-12 Therapy (CPB 0536, reviewed 2025-08-21)
aetna.com · Always check the source before changing claims.
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Related policy hubs

Aetna policiesInternal MedicineGeneral PracticeHematologyOncologyNeurologyCode 83090Code 64450Code 96372Code J3420Code J3425Code J8610Code J8611Code J8612Code J9255Code J9260Code J9292Code J9294Code J9296Code J9297Code J9305Code J9314Code J9322Code J9323Code J9324Code B70.0Code D51.0Code D52.0Code D53.1Code D53.9Code E53.8Code E71.120Code E72.11Code G62.1Code G99.0Code H46.3Code K31.1Code K31.5Code K63.2Code K63.89Code K91.1Code K91.2Code Z98.0

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