Biologic claims are large, and most of the reasons they’re denied can be seen before they’re filed. This is the review our billing team runs on a biologic claim before it goes out.
Coverage on the date of service
Eligibility is checked for the date of the injection, not the date of the last visit. We confirm the plan is active, that the drug is covered under the medical benefit, and what the deductible and coinsurance will leave the patient owing. A new plan year or a new job is a common reason a claim that paid last month is denied this month.
The authorization matches the claim
A prior authorization is specific. We compare it with the claim line by line: the drug and its code, the dose and number of units, the dates the approval covers, the rendering provider and the place of service. If the payer wants the authorization number on the claim, it goes on the claim. An approval that expired last week, or one written for a different dose, is a denial waiting to happen.
Renewals need their own calendar. Many approvals for asthma and allergy biologics run for a set period and then require updated clinical notes showing how the patient has responded.
The code and the units
Each biologic is billed under a HCPCS code whose descriptor defines one unit. The billed units are the dose divided by that amount, not the number of syringes or vials.
| Medication | HCPCS | One unit | Dose | Billed units |
|---|---|---|---|---|
| Omalizumab | J2357 | 5 mg | 300 mg | 60 |
| Mepolizumab | J2182 | 1 mg | 100 mg | 100 |
| Benralizumab | J0517 | 1 mg | 30 mg | 30 |
| Tezepelumab | J2356 | 1 mg | 210 mg | 210 |
Units that don’t match the dose in the chart, or the units on the authorization, are a frequent reason a biologic claim is held or denied.
NDC, wastage and modifiers
Many payers, state Medicaid programs among them, require the 11-digit National Drug Code on the line, with its qualifier, unit of measure and quantity. The NDC has to match the product actually given; a different package has a different NDC.
Medicare requires the JW modifier to report drug discarded from a single-dose container, and the JZ modifier to attest that none was. Commercial payers set their own rules, so we follow each payer’s policy rather than one habit.
The administration code, usually 96372 for a subcutaneous injection, goes on the same claim. If the provider also performed a significant, separately identifiable evaluation that day, the visit code carries modifier 25. If not, the visit doesn’t belong on the claim.
Diagnosis, provider and the chart
The diagnosis codes have to support the payer’s coverage policy for the drug, at the specificity the policy names: severe persistent asthma, for example, rather than unspecified asthma. The rendering provider must be enrolled with the payer, and the place of service must match where the injection was given.
The chart has to show it all: the order, the dose, the lot number and expiration date, the injection site and who administered it. Then timely filing. Every payer has a deadline, and a clean claim filed late is still a denied claim.
Why before, not after
Before a claim is filed, a fix is one edit. After a denial, it means a corrected claim or an appeal, a wait for the payer’s answer, and a drug the practice has already paid for. On the claims Medico’s billing team files, these checks run before the claim goes out, and every change comes with the reason for it.
