Utilization Review Assistant

Overview

Assist utilization review (UR) nurses and physicians in evaluating the medical necessity and appropriateness of healthcare services. This skill applies standardized criteria (InterQual, Milliman Care Guidelines, CMS guidelines) to patient clinical data to assess admission appropriateness, level-of-care determinations, continued-stay justification, and discharge readiness — supporting both concurrent and retrospective review workflows.

When to Use

• Evaluating whether an admission meets inpatient vs. observation criteria
• Justifying continued inpatient stay for payer review
• Preparing clinical summaries for peer-to-peer discussions
• Performing retrospective utilization review for denials management
• Assessing level-of-care appropriateness (ICU, step-down, med-surg, SNF)
• Supporting discharge planning with readiness assessment

Required Inputs

Input	Description	Format
Patient clinical data	Diagnoses, vitals, labs, treatments, clinical status	Structured object
Admission details	Date, source, admitting diagnosis, attending	Structured object
Current treatment plan	Active orders, medications, therapies	Structured list
Review type	Concurrent, retrospective, pre-service	Enum string
Payer information	Insurance type, plan specifics	Structured object

Methodology

Step 1: Clinical Data Synthesis

Compile the clinical picture required for criteria application:

1. Severity of illness (SI) indicators: vital sign instability, lab abnormalities, acute symptoms
2. Intensity of service (IS) indicators: IV medications, monitoring requirements, nursing intensity
3. Current clinical trajectory: improving, stable, worsening
4. Comorbidity burden: conditions affecting recovery and resource needs

Step 2: Criteria Application

Apply standardized utilization criteria systematically:

InterQual Framework:

Admission Criteria:

• Severity of Illness (must meet threshold)
• Intensity of Service (must match SI)

Continued Stay Criteria:

• Ongoing acute care needs
• Active treatment requiring inpatient level
• Clinical instability preventing safe discharge

Discharge Criteria:

• Clinical stability parameters met
• Safe discharge plan in place
• Follow-up arranged

CMS Two-Midnight Rule:

• Inpatient admission appropriate when physician expects patient to require hospital care spanning at least two midnights
• If less than 2 midnights expected, observation status typically appropriate
• Exceptions: certain procedures on the CMS Inpatient-Only List

Step 3: Level-of-Care Assessment

Determine the appropriate care level:

Level	Criteria Indicators
ICU	Mechanical ventilation, vasopressors, continuous monitoring, hemodynamic instability
Step-down/Telemetry	Cardiac monitoring, frequent assessments, IV drips (non-vasopressor)
Med-Surg Inpatient	IV medications, skilled nursing, diagnostic workup requiring observation
Observation	Expected less than 2 midnights, diagnostic uncertainty, short-course treatment
SNF/Rehab	Medically stable, requires daily skilled services, 3-midnight qualifying stay
Home with services	Stable, homebound, needs skilled nursing/therapy visits

Step 4: Justification Documentation

Build the clinical justification narrative:

1. Medical necessity statement: Why this level of care is required
2. Alternative consideration: Why lower-level care is insufficient
3. Clinical evidence: Specific findings supporting the determination (vitals, labs, functional status)
4. Treatment plan rationale: Active treatments requiring this care setting
5. Discharge barriers: What must change before step-down or discharge is safe

Step 5: Determination and Recommendation

Produce the UR determination:

Determination Options:

• APPROVED: Meets criteria for requested level of care
• APPROVED WITH MODIFICATION: Meets criteria at a different level
• PENDING CLINICAL: Additional information needed for determination
• REFERRED TO PHYSICIAN REVIEWER: Does not clearly meet criteria, requires MD review
• NOT MEETING CRITERIA: Does not meet medical necessity for this level

Output Specification

The output includes:

review_metadata: review_type, review_date, reviewer, payer

patient_summary: admitting_diagnosis (description, icd10), admission_date, current_los, current_level

clinical_indicators: severity_of_illness indicators with values and threshold status, intensity_of_service items with frequency and inpatient requirement, clinical_trajectory (improving/stable/worsening)

criteria_evaluation: criteria_set used (InterQual/Milliman/CMS), admission_criteria_met, continued_stay_criteria_met, discharge_criteria_met, level_of_care_appropriate, recommended_level, supporting_evidence

determination: decision, rationale narrative, next_review_date, estimated_discharge, discharge_barriers with resolution plans

peer_to_peer_prep: key_talking_points, anticipated_payer_concerns, supporting_clinical_evidence

Analysis Framework

Medical Necessity Evaluation Matrix

Factor	Meets Inpatient	Observation	Outpatient
Vital instability	Persistent abnormality	Transient, improving	Stable
IV medication need	Continuous or frequent	Short-course (under 24h)	Oral equivalent available
Monitoring	Continuous/q1-2h	q4-6h	Self-monitoring
Procedure recovery	High-risk, anesthesia	Minor, moderate sedation	Office-based
Fall/safety risk	High, requires supervision	Moderate	Low
Functional status	Cannot perform ADLs	Limited ADLs	Independent

Length-of-Stay Benchmarking

Compare actual LOS against geometric mean LOS (GMLOS) for the MS-DRG:

• Below GMLOS: Efficient, ensure not premature discharge
• At GMLOS: Expected, document ongoing medical necessity
• Above GMLOS: Requires strong justification; identify and document barriers

Examples

Input: 72-year-old admitted for community-acquired pneumonia, day 3. On IV ceftriaxone/azithromycin. O2 4L NC, SpO2 94%. Temp 99.1F (down from 102F on admission). WBC 11.2 (down from 18.5).

UR Assessment:

• SI: Meets — supplemental O2 requirement, resolving leukocytosis
• IS: Meets — IV antibiotics, supplemental oxygen
• Trajectory: Improving (temp, WBC trending down)
• Continued stay: APPROVED — still requiring supplemental O2 and IV antibiotics; transition to oral not yet safe (O2 dependent)
• Estimated step-down: Day 4-5 when O2 weaned and tolerating oral antibiotics
• Next review: Day 4

Guidelines

1. Apply criteria objectively — base determinations on documented clinical findings, not clinical intuition
2. Document contemporaneously — review findings must reflect clinical status at the time of review
3. Consider the whole patient — comorbidities, functional status, and social factors impact care needs
4. Prepare for peer-to-peer — document the strongest clinical justification points upfront
5. Track avoidable days — identify days where care could have been provided at a lower level

Validation Checklist

• Clinical data is current (within 24 hours for concurrent review)
• SI and IS indicators are specific and measurable (not vague)
• Criteria set used is specified and appropriate for the payer
• Level-of-care recommendation is justified with specific clinical rationale
• Discharge barriers are identified with resolution plans and timelines
• Peer-to-peer talking points address likely payer objections
• Review complies with UMCRA (Utilization Management Certification and Review Act) if applicable

HIPAA Compliance Notes

• UR data shared with payers must comply with minimum necessary and TPO (Treatment, Payment, Operations) permitted uses
• Peer-to-peer discussions should be documented but limited to relevant clinical information
• UR determinations stored in the medical record are subject to patient access rights
• Third-party UR vendors must operate under a BAA
• Restrict UR system access to authorized UR staff, physicians, and care management personnel