Outpatient Drug Screen Testing - Facility
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Covers reimbursement rules for outpatient facility presumptive (CPT) and definitive (HCPCS Level II) drug screen testing and who may be reimbursed under the health plan.
Added note that this policy does not apply when presumptive drug screen testing (CPT) and definitive drug screen testing (HCPCS Level II) are billed with Partial Hospitalization Program, and Intensive Outpatient Program Revenue codes.
Updated Related Coding Section code list by removing examples.
Updated policy title from Outpatient Drug Screen Billing - Facility and refined Definitions; added coding link to Related Coding section.
Outpatient Facility Coverage Criteria
Outpatient facility drug screen reimbursement criteria
Reimbursement stance and key coding rules for outpatient facility drug screen testing.
Detection of presence/absence of drugs or identification of specific substances/metabolites when medically indicated.
Definitive testing may be used when medically indicated to detect substances not identified by presumptive methods or to refine presumptive results. Documentation must support medical necessity.
Related Coding and Billing Rules
| G0659 | HCPCS definitive drug testing code (Level II) |
| G0480 | Definitive drug test code series (example listed in policy) |
| G0481 | Definitive drug test code series (example listed in policy) |
| G0482 | Definitive drug test code series (example listed in policy) |
| G0483 | Definitive drug test code series (example listed in policy) |
| Presumptive CPT codes | CPT codes for presumptive/qualitative drug testing (treated separately from HCPCS definitive codes) |
Key Definitions
Documentation, Ordering, and Claim Submission
Documentation and authorization expectations
Provider documentation and the member's medical record must support that definitive drug testing was properly ordered; when definitive testing is confirmatory, documentation must show the order was based on the presumptive test result. Services must meet authorization and medical necessity guidelines and applicable state/federal/provider contracts.
- Medical record must show the definitive test was ordered and medically necessary.
- For confirmatory definitive tests, documentation must reference the presumptive test result that prompted the order.
- Services must meet applicable authorization and medical necessity requirements and contract mandates.
Claim submission enforcement
Use proper, industry-standard billing and submission guidelines and compliant CPT/HCPCS/revenue codes supported by the medical record; failure to follow appropriate coding/billing guidelines or current reimbursement policies can result in claim rejection, denial, or recovery/recoupment of payment.
- Ensure claims use correct CPT, HCPCS, and revenue codes and that documentation fully supports billed services.
- Noncompliance may lead to claim rejection or denial, and the health plan may recover or recoup payments.
- Reimbursement policies may be superseded by provider, state, federal, or CMS mandates.
Ordering Requirements
Include ordering rationale and presumptive results for confirmatory tests
Provider orders must be present in the medical record; for confirmatory definitive testing the order should be based on presumptive test results and documented accordingly.
- Ensure the presumptive test result that prompted confirmatory testing is included in the record.
- Retain authorization and medical necessity documentation consistent with state/federal/provider contract requirements.
Exclusions and Not Covered Services
The policy specifies that CPT definitive drug screen testing codes are considered always bundled and not eligible for reimbursement when billed on outpatient facility claims. The health plan allows reimbursement for presumptive (CPT) and definitive (HCPCS Level II) drug screen testing on outpatient facility claims unless other provider, state, federal contracts or requirements apply, but explicitly treats CPT definitive codes as bundled and non‑reimbursable.
When HCPCS Level II definitive drug code G0659 is reported together with G0480, G0481, G0482, or G0483, only G0659 will be eligible for reimbursement; the other listed definitive codes are not separately payable in that combination.
Operationally, this exclusion does not apply when presumptive CPT and definitive HCPCS Level II testing are billed with Partial Hospitalization Program (PHP) or Intensive Outpatient Program (IOP) revenue codes — the policy was updated effective 06/08/2026 to add this note.
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