Medical necessity
Panels denied for unsupported testing. Test selection documented per patient.
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Toxicology medical billing services
Toxicology billing is among the most audited areas in laboratory medicine: presumptive versus definitive testing, panel codes with drug-class counts, medical-necessity policies and frequency limits. Getting paid consistently requires disciplined test selection and documentation, not just coding.
What makes toxicology billing different
General billers treat every specialty the same. These are the rules, code families and payer habits that decide whether toxicology claims pay the first time.
- Presumptive testing (80305–80307) is billed per date of service regardless of the number of drug classes screened.
- Definitive testing (G0480–G0483 for Medicare; 80320–80377 for many commercial payers) is billed by the number of drug classes confirmed.
- Medical necessity must be documented per test: a standing order for a full panel on every patient is a denial and an audit trigger.
- Frequency limits and payer policies on definitive testing vary and are enforced closely.
Denials we see most in toxicology
Every denial gets a root cause, a fix and a feedback loop, so the same denial stops coming back.
Code set errors
Definitive codes denied for the wrong set per payer. Medicare G-codes versus commercial codes applied correctly.
Frequency limits
Tests denied as too frequent. Tracked per patient and payer.
How Core MB bills for toxicology
A dedicated team that already knows your payers' rules, plus the reporting to prove it is working. Credentialing for new toxicology providers runs in the same system, tracked live in your client portal.
- Payer-specific code sets for presumptive and definitive testing.
- Medical-necessity documentation support and test selection guidance.
- Frequency tracking and compliance monitoring.
Everything in the service
The full revenue cycle as standard for toxicology practices, priced on what we collect for you. Take all of it, or start with one piece such as AR recovery or credentialing.
- Insurance verification and eligibility checks
- Charge entry and specialty-specific coding review
- Claim scrubbing and electronic submission
- Payer follow-up on every open claim
- Denial management and appeals
- Payment posting and reconciliation
- Accounts receivable recovery
- Patient statements and balance support
- Monthly reporting you can read in five minutes
- Provider credentialing and payer enrollment
Toxicology billing questions
What is the difference between presumptive and definitive testing?
Presumptive screens indicate the presence of drug classes and are billed per date; definitive tests confirm specific substances and are billed by the number of classes. Payers scrutinize when definitive testing is ordered.
Why is toxicology billing audited so much?
Because of past overutilization. Payers enforce medical necessity per test and per patient, and standing full panels are a red flag. We help labs bill compliantly.
Which codes does Medicare want?
Medicare uses G-codes for definitive testing by class count, while many commercial payers use CPT codes. We apply the right set per payer.
How do we get started with Core MB for toxicology billing?
Send us your specialty, provider count and monthly claim volume through the quote form and we will come back with a written proposal. Transitions run alongside your current billing so nothing is dropped, and credentialing for new toxicology providers can start at the same time.
More in diagnostics
Find out what your toxicology billing is leaving on the table
Send us a snapshot of your current billing and we will come back with a quote and a realistic view of recoverable revenue.