How to Assess Whether Medications Are Reasonable and Necessary: A Claims Manager's Guide
A practical step-by-step framework for evaluating medication entitlement in workers compensation, NDIS, CTP, and life insurance claims.
Published: 4 April 2026
Introduction: Why Medication Assessment Matters
Medication disputes represent a significant source of claims cost, delay, and legal contention. As a claims manager, your ability to assess medication reasonableness confidently and defensibly protects both the insurer and the claimant. This guide provides a structured, step-by-step framework for making those assessments.
The Five-Step Assessment Framework
Apply these five steps systematically to each medication in a claim:
Step 1: Is the Medication Clinically Indicated for the Diagnosed Condition?
Begin by confirming the diagnosis. Is it well-documented in recent medical reports? Then ask: is this medication a recognised treatment for that diagnosis? Consult the Therapeutic Guidelines, PBS indications, or relevant clinical guidelines (e.g., RACGP, specialist college guidelines). If a claimant is on metformin for type 2 diabetes, clinical indication is clearly established. If they are on metformin for prediabetes or weight loss alone, the indication is weaker and may not meet the standard. If the medication is prescribed off-label (e.g., gabapentin for fibromyalgia), check whether evidence-based guidelines support off-label use.
Action if unclear: Request clarification from the prescriber: "Please confirm the indication for this medication and reference to relevant clinical guidelines."
Step 2: Is the Medication Consistent with Evidence-Based Practice Guidelines?
Having confirmed indication, check whether the medication aligns with current best practice. Therapeutic Guidelines, PBS, and specialist college publications define standard treatments and dosing. If a claimant is on an antidepressant at half the standard therapeutic dose with no documented reason, this may signal inadequate dosing or inappropriate prescribing. Conversely, if a claimant is on very high doses without documented justification (e.g., titration attempt, allergy to alternatives), the dose may not be appropriate.
Action if concerned: Note the discrepancy and include it in your request for pharmacy review: "Medication prescribed at X dose; standard recommendations are Y-Z. Please clarify dosing rationale."
Step 3: Is the Dose and Duration Appropriate for This Claimant?
Appropriate dosing is individualised. A dose appropriate for a 60kg adult may not be appropriate for an 40kg adult or someone with renal impairment. Check whether the prescriber has documented the rationale for the chosen dose. If a medication is prescribed for short-term use (benzodiazepines, acute antibiotics) but prescribed indefinitely without review, duration is not appropriate. If a claimant is on a pain medication at the high analgesic range for years without documented cancer pain or palliative care context, continued duration is questionable.
Action if concerned: Request documentation of dose appropriateness for the individual claimant and evidence of planned duration/review: "Please provide clinical notes documenting dose justification and plan for medication review/cessation."
Step 4: Are There Safer or More Cost-Effective Alternatives Available?
Even if the current medication is appropriate, a different medication may be equally effective with fewer side effects or lower cost. If a claimant is on an expensive branded antidepressant and an equivalent generic version is available at half the cost, the generic is the cost-effective choice. If a claimant is reporting adverse effects (sedation, tremor, nausea) on their current medication, a safer alternative may exist. Investigate whether switching would improve the claimant's tolerance and engagement in rehabilitation.
Action if identified: Discuss with the claimant and prescriber: "Alternative medication X has equivalent efficacy at lower cost/risk. Would you be willing to trial this as an alternative?"
Step 5: Is the Medication Supporting Functional Recovery and Return to Work?
This is the ultimate test, particularly in workers compensation and rehabilitation settings. The medication should enable, not prevent, progress toward recovery goals. If a medication is masking pain but preventing engagement in physiotherapy, it may be doing more harm than good. If a medication is allowing participation in rehabilitation and showing evidence of functional improvement, it clearly meets the test. Document whether functional benefit is being achieved or whether alternative approaches should be considered.
Action if benefit unclear: Request functional assessment: "Can you document the functional improvement attributable to this medication over the past three months? Is the claimant meeting rehabilitation goals?"
Medication-Specific Assessment Framework
Certain medication classes require particular scrutiny due to their higher prevalence in claims, cost, or risk profile. Below is a guide to assessing the most common contested medications:
| Medication Class | Common Scenarios in Claims | Red Flags to Watch | Assessment Guidance |
|---|---|---|---|
| Opioids | Post-injury pain management; chronic pain in long-term claims | Doses exceeding standard analgesic ranges; long-term use beyond acute phase; escalating doses without functional improvement; patient reports of excessive sedation or cognitive impairment | Assess functional outcome: is pain relief enabling rehabilitation or replacing it? Request functional capacity assessment and return-to-work feasibility. Refer for pharmacy review if long-term use without documented pain reduction or functional improvement. Consider opioid rotation or step-down plans. |
| Benzodiazepines | Acute anxiety or sleep disturbance post-injury; anxiety in ongoing claims | Use beyond 2-4 weeks; escalating doses; patient on multiple benzodiazepines; patient reports cognitive impairment or falls risk | Short-term use (up to 4 weeks) for acute symptoms is typically reasonable. Long-term use requires strong justification and planned withdrawal strategy. Refer for pharmacy review if long-term use without documented plan. Consider psychology-based interventions as alternative or adjunct. |
| Antidepressants | Psychological injury from work incident; mood symptoms post-injury | Use without documented depression diagnosis; use at doses below therapeutic range; use for unrelated comorbidity | Confirm diagnosis and indication. Ensure dose is within therapeutic range. Assess functional outcome: is mood improving? Is participation in rehabilitation improving? If no improvement after 8-12 weeks at therapeutic dose, consider alternative medication or psychological intervention. Refer for pharmacy review if multiple antidepressants prescribed concurrently. |
| Antispasticity Agents | Spasticity management in neurological conditions; post-stroke or spinal cord injury | High doses causing excessive sedation; use without documented functional improvement; use without accompanying physiotherapy | Antispasticity medications support function by reducing muscle tone and pain. Assess whether the medication is enabling participation in therapy and improving function. If excessive sedation is impairing rehabilitation, dose reduction or medication change should be considered. Usually reasonable and necessary in neurological injuries. |
| Medicinal Cannabis | Pain management; spasticity; nausea; emerging area in workers comp and NDIS | Prescribed without clear indication; high cost; lack of documented efficacy; patient reports of impaired cognition or safety concerns | Ensure prescription is from authorised practitioner. Confirm indication is evidence-based (pain, spasticity, chemotherapy-related symptoms are strongest indications). Request documented efficacy assessment at 4-6 weeks and 12 weeks. Assess cost relative to alternatives. In workers comp, link to injury must be explicit. Refer for pharmacy review if efficacy is unclear. |
| GLP-1 Medications | Type 2 diabetes management; weight loss (emerging use in claims) | Prescribed for weight loss without diabetes diagnosis; high cost; prescribed without documented metabolic indication or pre-existing diabetes diagnosis | Confirm diagnosis (type 2 diabetes or other approved indication). If diabetes developed before injury, cost may not be compensable (pre-existing condition). If diabetes develops after injury, standard insulin or oral agents are usually more cost-effective first-line. GLP-1 agents are high-cost; justify cost relative to outcome and alternatives. Query off-label weight loss prescribing. |
| High-Dose Vitamins or Supplements | Nutritional support; pain management; recovery optimisation | Prescribed without indication; not evidence-based; high cost; prescribed indefinitely without review | Most vitamins and supplements are general nutrition, not compensable treatment. Exception: specific deficiency requiring supplement (documented with blood results). Ensure doses and duration are evidence-based. Question long-term high-dose supplementation without clinical indication. Refer for pharmacy review if cost is significant. |
Red Flags Checklist: When to Seek Independent Pharmacy Review
You should consider referring a medication for independent pharmacy review if you identify any of the following red flags:
- Medication prescribed without documented indication or diagnosis
- Dose substantially exceeding standard therapeutic range without documented justification
- Medication prescribed for duration exceeding evidence-based recommendations (e.g., benzodiazepines beyond 4 weeks)
- Multiple medications in the same class (e.g., two antidepressants, two anticonvulsants) without clear indication for combination therapy
- Medication prescribed off-label without evidence-based justification
- Patient reports of adverse effects impairing function or rehabilitation engagement
- No documented review of medication efficacy for six months or more
- Medication cost is high (over $100 monthly) relative to documented functional benefit
- Medication masking symptoms but preventing engagement in active rehabilitation
- Prescriber unable or unwilling to provide clinical justification or explain deviation from guidelines
- Patient or legal representative has disputed the medication or challenged entitlement
How to Challenge a Medication: Professional Communication
When you identify concerns about a medication, your approach matters. You want to raise legitimate questions without alienating the prescriber or appearing to second-guess clinical judgment. Here is the approach:
- Request clarification, not rejection: Begin by seeking information: "Can you clarify the indication for X medication?" is less confrontational than "This medication is not compensable."
- Reference guidelines: If the prescribing deviates from guidelines, reference the guideline: "Therapeutic Guidelines recommend Y dose for this condition; the claimant is receiving Z. Can you explain the reason for the higher dose?"
- Ask about alternatives: If cost-effectiveness is a concern, ask whether alternatives exist: "Are there alternatives to X medication that might achieve equivalent outcomes at lower cost or with fewer side effects?"
- Propose independent review: If concerns persist, offer independent review neutrally: "To ensure we are providing optimal, evidence-based medication management, I would like to refer for independent pharmacy review. This will provide objective assessment and recommendations."
- Document your request and the response: Record what you asked and how the prescriber responded. This documentation is essential if the matter progresses to dispute or formal review.
Documentation: Recording Your Assessment
Your medication assessment must be documented clearly in the claim file for future reference and defensibility. Include:
- Date of assessment and documents reviewed
- For each medication: name, dose, indication, date commenced, and prescriber
- Your assessment of clinical indication and evidence-based appropriateness
- Any red flags identified and how you addressed them
- Cost-effectiveness assessment (particularly for high-cost medications)
- Functional benefit assessment (does the medication support recovery/return to work?)
- If queried: the specific communication with prescriber and their response
- Final decision: approved, approved with condition, not approved, or referred for review
- If referred for pharmacy review: date referred and expected date of report
When to Escalate to Management or Legal
You should escalate medication decisions to management or legal review if:
- The claimant or their legal representative has formally disputed a medication entitlement decision
- Medication cost is very high (over $500 monthly) and you are proposing non-approval or partial approval
- The medication is experimental or not on PBS or the TGA approved medicines list
- You identify evidence of medication misuse, overuse, or potential fraud (e.g., multiple prescriptions from different sources)
- The prescriber refuses to provide clinical justification or respond to requests for clarification
- Independent pharmacy review recommends cessation or major reduction of a medication and the prescriber disagrees
These scenarios benefit from structured legal or management review to ensure your position is defensible.
Common Assessment Scenarios
Here are three realistic scenarios and how to assess them:
Scenario 1: Long-Term Opioid Management
A worker injured their back 18 months ago. They are on oxycodone 20mg twice daily for pain. They have completed physiotherapy and returned to light duties, but they remain on the same opioid dose with no documented plan for reduction. What do you do?
Assessment approach: Request recent medical notes documenting pain levels, functional limitations, and plan for opioid management. Ask the prescriber: "The claimant has returned to work on light duties. What is the plan for opioid dose reduction or management?" If no plan exists, refer for pharmacy review. The review will assess whether current dosing is still necessary or whether step-down is appropriate. This is reasonable challenge to a long-standing medication without documented evidence of ongoing necessity.
Scenario 2: High-Cost New Medication
A claimant with NDIS funding is prescribed a new GLP-1 medication for weight loss at a cost of $400 monthly. The claimant has no documented diabetes or metabolic condition; the prescriber describes it as "wellness medication." What do you do?
Assessment approach: This medication fails multiple tests. First, it lacks clear indication (no diabetes). Second, it is off-label for weight loss without evidence-based justification. Third, it is high-cost for a non-evidence-based use. Fourth, in NDIS context, weight loss is general health management, not disability-related support. Formally decline funding and explain: "Weight loss medications are general health management and are not disability-related supports under the NDIS. Suggest GP referral for weight management support via mainstream health services." Document this clearly.
Scenario 3: Medication Impairing Rehabilitation
A worker 3 months post-injury is prescribed amitriptyline 75mg nightly for pain. Physiotherapy notes describe the claimant as very sedated, having difficulty engaging in exercise. The physiotherapist queries whether the medication is appropriate. What do you do?
Assessment approach: Contact the prescriber: "The claimant is experiencing significant sedation on amitriptyline 75mg that is impairing rehabilitation participation. Can we trial a lower dose or an alternative with lower sedation risk?" This is a legitimate, professional challenge to a medication that is undermining recovery. Request response within 5 business days. If prescriber is unwilling to adjust, refer for pharmacy review. The review will assess alternatives and provide evidence-based recommendation.
Building Confidence in Your Assessment
Medication assessment is a skill that develops with practice. To build your confidence and competence:
- Familiarise yourself with Therapeutic Guidelines and PBS as reference resources
- Attend training on medication assessment (IMM can provide this)
- Build relationships with your independent pharmacy reviewer, so you understand their expertise and can consult informally
- Maintain a collection of de-identified examples of medication disputes you have managed, so you can reference them in future similar situations
- When you are uncertain, refer for review rather than guessing; over time, you will develop pattern recognition that allows confident assessment
Medication assessment can feel overwhelming, but you do not have to do it alone. IMM provides training, consultation, and independent pharmacy review services tailored to claims managers who work in workers compensation, NDIS, CTP, and life insurance.
Read the definitive guide to reasonable and necessary medications
