Examples
Worked examples
- Is an instance
A hospital submits an inpatient UB-04 claim for a patient enrolled in an NIH-funded oncology trial that meets NCD 310.1's qualifying criteria. Because the admission includes routine standard-of-care items billed to Medicare alongside the trial, the claim carries Condition Code 30, diagnosis code Z00.6, and the trial's NCT number in value code D4 — signaling the MAC to apply Clinical Trial Policy coverage rules rather than deny the claim as investigational.
- Is an instance
An outpatient facility claim for a patient in a qualifying device trial includes both routine services (modifier Q1) and the investigational device itself (modifier Q0). The facility claim still carries Condition Code 30 because it is an institutional claim tied to a qualifying trial, regardless of the fact that not every individual line item is trial-specific.
Counter-examples
Looks similar, but isn't
- Not an instance
A hospital claim for a patient enrolled in a trial that does not meet any of NCD 310.1's deeming criteria and has not been independently confirmed to qualify does not carry Condition Code 30 — applying it to a non-qualifying trial risks a false claim, since the code asserts to the MAC that Medicare's Clinical Trial Policy coverage rules apply.
- Not an instance
A professional (physician) claim on a CMS-1500 form does not use Condition Code 30 at all — condition codes are a UB-04/837I institutional-claim field; professional claims signal trial participation through the Q0/Q1 modifiers and the NCT number instead.
Editorial commentary
Condition Code 30 is a claims-processing flag, not a coverage determination in itself. It is entered on an institutional Medicare claim — the UB-04 (CMS-1450) paper form or its electronic equivalent, the 837I transaction — to tell the Medicare Administrative Contractor (MAC) that the claim relates to a clinical trial that qualifies for routine-costs coverage under Medicare’s Clinical Trial Policy, National Coverage Determination (NCD) 310.1. Getting this billing mechanic wrong — applying it to a non-qualifying trial, or failing to apply it correctly alongside sponsor billing — is exactly the kind of institutional-claim error that turns into False Claims Act exposure; see CASRAI’s guide to False Claims Act Liability in Clinical Trial Billing for that risk in depth.
What makes a trial “qualifying” under NCD 310.1
Condition Code 30 is only appropriate when the underlying study meets NCD 310.1’s qualifying-clinical-trial criteria: the trial’s subject and purpose must fall within a Medicare benefit category, it must have therapeutic intent (not solely to test toxicity or disease mechanisms), and it must satisfy at least one of the NCD’s deeming criteria — including federal funding or support from NIH, CDC, AHRQ, CMS, DOD, or VA, or conduct under an FDA Investigational New Drug (IND) application. For the full mechanics of how NCDs and their regional counterparts (LCDs) function, see CASRAI’s Medicare Coverage Determinations: NCD vs LCD Explained. A trial that does not meet these criteria does not qualify for Condition Code 30 or the routine-costs coverage it signals — sponsors and institutions sometimes separately assess and document qualification before billing begins.
How it’s reported on a claim
Per Medicare claims-processing guidance (CMS Publication 100-04, and MAC-published billing guides such as Noridian’s Clinical Trials Coverage and Billing Guide), institutional providers report Condition Code 30 on every clinical-trial-related claim from a qualifying study — inpatient or outpatient — regardless of whether every line item on that specific claim is trial-related. It is reported together with two other required elements:
- ICD-10 diagnosis code Z00.6 (encounter for examination for normal comparison and control in clinical research), entered in the primary or secondary diagnosis position.
- The trial’s eight-digit National Clinical Trial (NCT) number, entered as UB-04 value code D4, or on the 837I as loop 2300, REF02 with REF01 = P4. This is the same NCT identifier assigned at trial registration — see CASRAI’s ClinicalTrials.gov entry for how that identifier is issued.
Outpatient and professional claims add two HCPCS modifiers that Condition Code 30 does not replace: Q1, appended to line items that are routine clinical services furnished as part of an approved clinical research study, and Q0, appended to the investigational item or service itself. Condition Code 30 operates at the claim level (this claim relates to a qualifying trial); Q0/Q1 operate at the line-item level (this specific service is investigational vs. routine). Both are typically required together on outpatient facility claims from a qualifying study.
Why it matters for compliance
Condition Code 30 exists because Medicare’s default rule is that it does not pay for items or services that are purely investigational. NCD 310.1 carves out an exception for routine patient-care costs delivered alongside a qualifying trial — the costs a beneficiary would have incurred regardless of trial enrollment (office visits, standard imaging, standard-of-care drugs) — while the trial sponsor typically remains responsible for the trial-specific, investigational, and data-collection costs under the clinical trial agreement. Reporting Condition Code 30 without a genuinely qualifying trial, or billing Medicare for costs the sponsor has already agreed to cover, are the two fact patterns that have driven real False Claims Act settlements against academic medical centers; see the FCA billing guide linked above for documented examples of that liability.
Machine-readable encodings
Use in your systems
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vocab-identifier="https://casrai.org/dictionary/"
vocab-term="Condition Code 30"
vocab-term-identifier="https://casrai.org/dictionary/term/condition-code-30" />{
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"description": "Condition Code 30 is the two-digit value (\"30 – Qualifying Clinical Trial\") entered in the condition codes field of an institutional Medicare claim (UB-04 / CMS-1450, or the equivalent field on the electronic 837I transaction) to flag that the claim includes items or services furnished in connection with a qualifying clinical trial under Medicare's Clinical Trial Policy (National Coverage Determination 310.1). A claim requires Condition Code 30 when the trial meets NCD 310.1's qualifying criteria (falls within a Medicare benefit category, has therapeutic intent, and satisfies one of the NCD's deeming criteria — including NIH, FDA IND, or VA/DOD/CDC/AHRQ/CMS-funded/-supported studies) and the provider is billing Medicare for routine patient-care costs alongside the trial. It is reported on ALL clinical-trial-related institutional claims from a qualifying study, whether or not every line item on that particular claim is trial-related, and is submitted together with ICD-10 diagnosis code Z00.6 (encounter for examination for normal comparison and control in clinical research) and the trial's eight-digit National Clinical Trial (NCT) number — reported as UB-04 value code D4, or in loop 2300, REF02 (REF01 = P4) on the 837I. It functions purely as a claims-processing flag: it does not itself create coverage, it tells the Medicare Administrative Contractor (MAC) which coverage rules to apply to the claim.",
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"sameAs": [],
"license": "https://creativecommons.org/licenses/by/4.0/",
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},
"dateModified": "2026-07-18T02:23:21",
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