Concurrent Review and Utilization Management: How to Respond in Real Time

Most people think about insurance appeals as something that happens after treatment ends. But some of the most consequential insurance battles happen while you are still in the hospital or treatment facility. Concurrent utilization review is the process by which your insurer evaluates the necessity of ongoing care in real time — and when they issue a "continued stay denial," it can create immediate pressure to discharge you before you are clinically ready. Understanding how concurrent review works, and how to respond quickly, can protect your care and your finances.

Why Insurers Issue Concurrent Stay Denials

interqual-or-mcg-continued-stay-criteria">Failure to Meet InterQual or MCG Continued Stay Criteria

Insurance companies apply the same utilization management criteria used for initial authorization — most commonly InterQual Level of Care criteria or MCG (formerly Milliman) guidelines — on a daily or periodic basis during hospitalization. If the facility's daily clinical updates do not demonstrate that you continue to meet the specific criteria for the current level of care, a continued stay denial is issued. These criteria focus on specific measurable clinical indicators (vital sign instability, active IV medication requirements, nursing dependency levels) that may not capture the full picture of your clinical condition as your treating physician understands it.

Mental Health and Substance Use Level-of-Care Disputes

Concurrent review denials are especially common in inpatient psychiatric and residential substance use disorder treatment settings. Insurers apply the ASAM Criteria or LOCUS/CALOCUS assessment tools to evaluate whether continued inpatient or residential treatment is medically necessary. These tools require documentation of specific risk factors, functional impairment, and environment-of-care needs that treatment staff may not have explicitly documented in the format the insurer requires. The federal Mental Health Parity and Addiction Equity Act (MHPAEA) prohibits applying more restrictive concurrent review requirements to behavioral health stays than are applied to comparable medical-surgical admissions.

"Observation Status" Rather Than Inpatient Admission

A closely related problem is when a hospital places you in "observation status" rather than admitting you as an inpatient. This classification has major financial consequences: Medicare pays substantially less for observation stays than inpatient admissions, and your cost-sharing obligations can be significantly higher. Under the NOTICE Act (effective 2016), hospitals must provide written notice within 36 hours to patients placed in observation status for more than 24 hours. If you were not given this notice, or if your treating physician believes inpatient admission was clinically warranted, the observation status classification can itself be appealed.

Retroactive Concurrent Review Denials

Even if you were not notified of a coverage dispute during your stay, you may receive a bill after discharge reflecting that the insurer retroactively denied part of your hospitalization through a post-discharge concurrent review. These retroactive denials are appealable through the standard internal appeal process, with your clinical condition at the time of the denied days — not at the time of the appeal — as the relevant clinical question.

How to Appeal

Step 1: File an Expedited Internal Appeal Immediately

If you receive a continued stay denial while you are still hospitalized, do not wait. File an expedited internal appeal immediately. Under ACA regulations, expedited internal appeals must be resolved within 72 hours. Request the expedited appeal orally or in writing through the hospital's patient advocate or case management team, and confirm that the request was received and documented by the insurer. Ask the hospital's utilization management staff to coordinate with your insurer simultaneously.

Step 2: Request the Specific Criteria Behind the Denial

Under ERISA Section 503 and ACA regulations, you are entitled to the specific clinical criteria your insurer applied when issuing the concurrent stay denial. Request these criteria immediately. For behavioral health concurrent review denials, also request the plan's MHPAEA comparative analysis documenting how the concurrent review criteria applied to your behavioral health stay compare to those applied to comparable medical-surgical admissions.

Step 3: Obtain Your Treating Physician's Clinical Justification in Writing

Your attending physician — the clinician responsible for your care at the time of the denial — must provide a written statement explaining why continued care at the current level of care is medically necessary. The statement should reference specific clinical indicators: active medication requirements, vital sign instability, daily monitoring needs, risk of deterioration without continued care, and the clinical basis for why step-down to a lower level of care would be unsafe or inadequate. This documentation must be aligned with the specific criteria used by the insurer.

Step 4: Invoke MHPAEA for Behavioral Health Concurrent Review Denials

For psychiatric or substance use disorder stays, include a specific MHPAEA parity argument in your expedited appeal. Cite 29 U.S.C. § 1185a (MHPAEA) and the 2024 MHPAEA final rule. Assert that the concurrent review criteria being applied to your behavioral health stay are more stringent than those applied to analogous medical-surgical admissions. Request the plan's comparative analysis documenting this. If the insurer cannot produce a compliant comparative analysis, that strengthens your External Independent Review: Complete Guide" class="auto-link">external review and regulatory complaint arguments.

Step 5: Contact Your State Insurance Commissioner for Concurrent Denials

While the internal appeal is pending, file a simultaneous complaint with your state insurance commissioner. State regulators take concurrent care denials for hospitalized patients seriously, particularly when the denial creates imminent patient safety concerns. Many state insurance departments have emergency or expedited complaint processes for situations where care is being denied in real time.

Step 6: Request External Review Immediately After Final Internal Denial

If the expedited internal appeal is denied, request external review by an Independent Review Organization immediately. For concurrent care denials, you may be entitled to request external review before exhausting all internal appeal levels if the situation is urgent. The ACA permits direct access to external review when an expedited internal appeal is pending in emergency situations.

What to Include in Your Appeal

• The concurrent stay denial notice with the specific criteria cited and the date coverage was denied
• Your attending physician's written clinical justification documenting specific indicators of medical necessity for continued care at the current level
• Relevant ICD-10 diagnosis codes and the level-of-care criteria (ASAM, LOCUS, InterQual) cited in the denial
• For behavioral health: a MHPAEA parity argument citing the 2024 MHPAEA final rule and a request for the plan's comparative analysis
• The timeline of the stay, the initial authorization, and the point at which concurrent review was initiated

Fight Back With ClaimBack

Concurrent review denials require immediate action with precisely targeted clinical arguments — there is no time for a generic appeal. ClaimBack helps you build an expedited appeal that directly addresses the continued-stay criteria your insurer applied and invokes the legal protections available for real-time denials. ClaimBack generates a professional appeal letter in 3 minutes.

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Related Reading

• How to Write an Insurance Appeal Letter
• What Is Medical Necessity?
• Internal vs External Insurance Appeal