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Inappropriate Use of Units Costs Practice Over $800,000

June 11th, 2018 - Wyn Staheli, Director of Research & Aimee Wilcox, CPMA, CCS-P, CMHP, CST, MA, MT
Categories:   Office of Inspector General (OIG)   Laboratory|Pathology   Drugs|Pharmaceuticals|FDA   Billing   HCPCS Coding  
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A recent OIG enforcement action emphasizes the need to understand the proper use of units. A healthcare provider in Connecticut submitted multiple units for urine drug screening tests. The press release stated that "Urine drug screening tests use a single sample of a patient’s urine to test for multiple classes of drugs. Although the test screens a patient’s urine for multiple classes of drugs, Medicare considers it a single test that should be billed only once per patient encounter."

The proper billing of units has proven to be problematic for more than just lab tests. Problems are also commonly reported with the billing of drugs and biologicals, timed codes, and multiple injections.

Drugs and Biologicals

One OIG review of a single MAC found a 57% error rate in the billing of drugs and biologicals. There are several reasons why there could be billing problems. Providers need to understand all the rules to ensure that they are billing properly. These problems commonly arise because packaging dosages typically don't match up with HCPCS descriptions. Claims MUST match up. For example, if the description for the HCPCS code specifies 25 milligrams and 100 milligrams are administered, 4 units should be billed.

So what do you do when they don't match up? Follow payer guidelines. According to Medicare, Do "not bill the units based on the way the drug is packaged, stored, or stocked. That is, if the HCPCS code descriptor for the drug code specifies 1 mg and a 10 mg vial of the drug was administered to the patient, bill 10 units, even though only 1 vial was administered." In this Medicare example, the drug would have been under-billed. However, more commonly, the drug is over-billed with too many units.

Another problematic area is rounding. What if the dosage doesn't match up to the packaging? According to Medicare, always round up. They state, "If the drug dose used in the care of a patient is not a multiple of the HCPCS code dosage descriptor, the provider rounds to the next highest unit." CMS has emphasized that units billed should be based on the dosage in the code description. There are two common problems that arise in this situation

  1. What if you only administer 10 mg and the code description states 25 mg? You round up and bill for one unit.
  2. What if there are multiple codes with varying dosages? Bill the code with the next unit. For example, what should you bill if you administer 50 mg of methylprednisolone acetate?There are 3 HCPCS codes:

Report the drugs as close to the way in which the provider administered them. Since Depo Medrol (methyprednisolone acetate) does not come in vials of 60 mg/cc, just bill what the provider used, which would likely be 3 cc from the 20 mg vial. Therefore, bill:

J1020 with 3 units (20 mg X 3 units = 60 mg)

Notes:

Injections

Injections are also a complex problem which is not fully addressed in this article. A few examples include:

1. Injection of lidocaine mixed with Depo Medrol 40 mg was injected into the right knee joint space.

2. After alcohol prep, a 24-guage 3.5-inch needle filled with a total of 10 ml (5 ml per side) of 0.25% Marcaine and 40 mg of Kenalog was used to inject four trigger points in the right gluteus medius and two into the left gluteus medius muscles (a total of two muscle groups). 

3. A total of 15 mL of 0.25% Marcaine, with 60 mg of Kenalog was used to inject multiple trigger points in the bilateral supraspinatus muscles and the right deltoid muscle. 

CLICK HERE for a helpful webinar with more comprehensive information.

Timed Codes

Timed codes have rounding rules which can vary by payer. In fact, there are slight differences between Medicare and the AMA regarding the 8-minute rounding rule (CLICK HERE). Providers need to be aware of these differences and document and bill the encounter properly in accordance with payer rules.

Find-A-Code Help

Find-A-Code offers some help at the code level. Keep in mind, that there is no substitute for reading the rules and carefully reviewing packaging.

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