R&N Determination | Low Risk

Is Factor X Reasonable and Necessary?

Reasonable and Necessary determination guidance for Factor X (PRONATIV human prothrombin complex powder for injection vial and solution for injection vial) on workers compensation and personal injury claims.

R&N Guide Source: TGA Updated April 2026

Whether Factor X (PRONATIV human prothrombin complex powder for injection vial and solution for injection vial) is reasonable and necessary depends on the compensable injury, prescribing duration, and clinical justification. Factor X is classified as Low risk by AllMeds. It is S4 under the TGA in Australia. Claims professionals should assess whether the prescribing is directly related to the injury, within clinical guidelines for duration and dose, and not for a pre-existing condition.

Key Takeaways

  • Risk level: Low (1 points)
  • Schedule: S4 in Australia
  • Key question: Is Factor X being prescribed for the compensable injury, or for a pre-existing or unrelated condition?

R&N Assessment: When Is Factor X Injury-Related?

Likely Reasonable and Necessary

  • Conditions directly caused by the compensable injury

Possibly Related - Requires Clinical Justification

  • Conditions that may be partially related to or aggravated by the injury

Likely Not Reasonable and Necessary

  • Pre-existing conditions managed before the injury occurred
  • Conditions with no clinical link to the compensable event

How to Make the R&N Determination

  1. Check injury relatedness: Is Factor X being prescribed for the compensable injury, or for a pre-existing or unrelated condition?
  2. Review clinical justification: Does the treating doctor's documentation explain why Factor X is necessary for this specific injury?
  3. Assess duration: Is the prescribing duration within clinical guidelines?
  4. Check for alternatives: Have safer or more appropriate treatments been trialled first?
  5. Review interactions: Is Factor X being combined with other medications that create additional risk?
  6. Document your determination: Record the R&N decision, rationale, and any actions taken in the claim file.

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Related Resources

Important: This page is general health information, not personal medical advice. If you have questions about your medication — including starting it, stopping it, changing the dose, or combining it with something else — speak with your doctor or pharmacist. For an emergency or suspected overdose, call your local emergency number or poison information service immediately. Information is drawn from regulator and clinical guideline sources (TGA, FDA, MHRA, NICE, PBS, CDC); see our methodology for details.