## **What is HCPCS code J3475?**
The HCPCS code J3475 is meant to designate the injection of magnesium sulfate, for every 500 mg total dosage. The purpose of this injection treatment is to boost the magnesium levels in a patient dealing with magnesium deficiency because of specific problems, such as hypomagnesemia, acute asthma exacerbations, cardiovascular issues, and preeclampsia/eclampsia in pregnant women to prevent them from having seizures.
If you're going to administer this medication, make sure to prepare a syringe, needle, and antiseptic wipes, and a bandage. The administration of this injection is normally well-tolerated, but it's best to always make preparations in case of adverse reactions. If you're administering this intravenously, please prepare IV-related equipment.
On the part of the patient, they must first undergo a blood test that analyzes magnesium levels in the bloodstream. Have them inform you about any medications and allergies they might have so you can determine if this injection is okay to use.
## **Documentation requirements for J3475**
As with any procedure, especially involving injecting drugs into patients, it's important to document the following before you file for a claim that includes this code:
- The full name of the personnel who administered the injection + their credentials
- The name and address of the facility where the injection was administered
- The full name of the patient
- The date(s) and time(s) of the drug administrations by injection
- The exact dosage throughout the treatment, infusion details, and route
- Blood test results showing magnesium levels
- Patient records showing a diagnosis of complications that affect magnesium levels and information concerning related symptoms
- Patient experience during and after the injection
## **Billing requirements for J3475**
Besides the documentation requirements above, please note the following billing requirements for this HCPCS code:
- They must reflect the dosage given over the course of the treatment.
- Use either of two modifiers: JW if there's unused medication in a vial (wastage), or JZ if there's no unused medication.
This should also accompany either one of these two CPT administration codes: 96365 if you administered the injection via IV, or 96372 if you administered it via IM.
Make sure to follow CMS/Medicare guidelines to avoid claim rejections.
## **Other similar codes**
- J3410 - Injection, hydroxyzine HCl, up to 25 mg
- J3430 - Injection, phytonadione (vitamin K), per 1 mg
- J3465 - Injection, voriconazole, 10 mg
- J3471 - Injection, hyaluronidase, ovine, preservative free, per 1 USP unit (up to 999 USP units)
- J3473 - Injection, hyaluronidase, recombinant, 1 USP unit
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