Suite 1300
Salt Lake City, UT 84111
Block-1 3rd Floor, Perungudi Bypass Rd, Perungudi,
Chennai - 600096
MGR Main Rd,
Perungudi, Chennai - 600096
Villupuram,
Tamil Nadu – 605602
Inpatient Rehab Billing for Hospitals
Precision Revenue Cycle for Inpatient Rehabilitation Facilities
IRF reimbursement depends on functional scoring, CMG classification, and PPS compliance. Small documentation gaps reduce CMG weight and directly lower reimbursement.
~1,100
IRFs Nationwide
hospital-based
60%
Federal Compliance Rule
diagnoses required
3 Hrs/Day
Therapy Minimum
admission
CMG
Case Mix Group System
reimbursement grouper
IRF revenue driven by classification systems
Trusted by 100+ healthcare providers | AAPC, AHIMA & AAHAM Certified | SOC 2 Type IIÂ
Why this is your conversion engine?
Key billing reference table
Billing Dimension
Detail & AnnexMed Approach
Claim Form
UB-04 with TOB 11X (inpatient rehabilitation); IRF-specific revenue codes
Reimbursement Model
IRF-PPS uses CMGs derived from IRF-PAI functional data
IRF-PAI Structure
27 IRF-PAI items incl. FIM scores determine CMG within 3 days
CMG Tier System
Tier 1 to Tier 3 comorbidities adjust base payment upward
60% Rule
60% Medicare cases must meet qualifying diagnosis criteria
Therapy Revenue Codes
042X, 043X, 044X therapy charges with documented daily hours
Physician Requirements
Physician visits 3x/week or daily for short stays, timed notes
Preadmission Screening
Preadmission screening within 48 hrs with goals and function
Short-Stay Outliers
Short LOS cases paid under IRF-PPS short-stay outlier rules
IRF QRP
Annual reporting required or 2% payment reduction applies
Key Denial Triggers
CMG gaps, IRF-PAI errors, screening and doc gaps drive loss
Medicare Advantage IRF
MA plans differ; PA rules, LOS limits vary by payer
Key RCM challenges
IRF-PAI Completion & FIM Score Accuracy
IRF-PAI drives CMG classification and reimbursement. FIM motor and cognitive scores must reflect observed function, not estimates. Completed by trained clinicians within deadlines. A miscoded FIM item can shift tiers, reduce payment, and create audit risk.
60% Rule Compliance Monitoring
CMS requires 60% of IRF Medicare patients consistently meet qualifying diagnoses. This must be tracked in real time at admission, not quarterly. Shifts in referral patterns and payer mix can reduce compliance. Falling below the threshold risks reclassification and major revenue loss.
Preadmission Screening Documentation
Medicare requires preadmission screening within 48 hours, documenting prior function, therapy tolerance, and clear rehab goals for IRF-level care eligibility. Deficiencies drive IRF denials. Compliance must be built into admission workflows, not audited after the fact.
Physician Visit Frequency Compliance
IRF regulations require rehab physicians to conduct face-to-face visits at least three times weekly, and daily for stays under one week. Each visit must include dated, timed documentation. Missing frequency documentation creates denial and prepayment risk, requiring census tracking.
CMG Tier Capture & Comorbidity Documentation
Within each CMG, tier assignment depends on qualifying comorbidities in the IRF-PAI. Tier 2 and 3 cases receive higher reimbursement than Tier 1. Accurate capture requires clear documentation and CDI support. Missed comorbidities leave revenue unclaimed across census
Three-Hour Therapy Documentation Integrity
The three-hour daily therapy threshold is both a clinical standard and billing requirement. Notes must document type, duration, and purpose of each session. If a patient cannot participate, reason and plan to resume therapy must be recorded. Documentation gaps create denial risk.
IRF Quality Reporting Program (IRF QRP)
Within each CMG, tier assignment depends on qualifying comorbidities in the IRF-PAI. Tier 2 and 3 cases receive higher reimbursement than Tier 1. Accurate capture requires clear documentation and CDI support. Missed comorbidities leave revenue unclaimed across census.
Medicare Advantage IRF Reimbursement
Medicare Advantage plans for IRF care differ from fee-for-service Medicare. Payer-specific prior authorization, LOS limits, and concurrent review require payer-by-payer management. As MA penetration grows, managing reimbursement across FFS and MA demands payer relationship capabilities.
AnnexMed's IRF services
IRF-PPS Billing (CMG-Based)
Complete IRF facility billing using CMG-based reimbursement, including tier assignment, outlier calculation, and IRF-PAI reconciliation. Every claim is validated fully before submission.
IRF-PAI Completion Support
IRF-PAI accuracy review, FIM scoring validation, comorbidity tier documentation audit, and submission deadline management. We identify discrepancies before the claim is filed.
UB-04 Institutional Billing
Complete facility claim management with IRF TOB 11X, accurate therapy and facility revenue coding, Medicare secondary payer coordination, and claim-level edits prior to submission.
PT / OT / SLP Therapy Billing
Therapy revenue code billing across 042X (PT), 043X (OT), and 044X (SLP). Daily session documentation review, three-hour compliance tracking, and therapy charge reconciliation.
60% Rule Compliance Monitoring
Real-time qualifying diagnosis ratio tracking at the admission level. Proactive alert management when trends approach the 60% threshold. Admission-level review for every IRF patient.
Preadmission Screening Support
Preadmission screening documentation review for completeness, including prior functional level, therapy tolerance, and rehab goals. Addresses deficiencies that lead to denials.
Physician Visit Tracking
Census-wide physician visit frequency monitoring (3x/week minimum). Documentation completeness review for dated notes. Prospective alerts when frequency falls below requirements.
IRF QRP Quality Reporting
Quality data collection, submission workflow management, and compliance monitoring to protect the full market basket update. We treat the 2% QRP penalty as a managed risk.
CDI — Rehabilitation Specialty
IRF-trained CDI specialists support CMG tier comorbidity capture, diagnosis accuracy, and IRF-PAI integrity. CDI is embedded directly in pre-claim review workflows, not added later.
Denial Management & IRF Appeals
IRF-specific denial management covering 60% Rule appeals, CMG tier disputes, preadmission screening denials, physician visit issues, and medical necessity appeals across commercial payers.
Prosthetics & Orthotics Billing
Inpatient prosthetic and orthotic device billing coordination during IRF admission for amputee rehabilitation and orthopaedic populations. Revenue coordination across facility billing.
Outpatient Therapy Transition
Post-IRF outpatient PT/OT/SLP billing setup, plan-of-care continuation, and therapy cap management for patients transitioning from inpatient to outpatient rehabilitation settings
Revenue Integrity Auditing
IRF-specific revenue audits covering IRF-PAI accuracy, therapy billing completeness, physician visit documentation, CMG tier capture, and 60% Rule analysis. Pre- and post-audit reporting included.
Patient Financial Counseling
Medicare Part A benefit day tracking, Medicare Advantage IRF benefit navigation, and discharge financial planning for extended-stay patients approaching benefit exhaustion.
AI-Driven Revenue Optimization
AI models analyze IRF claims, documentation, and patterns to flag revenue leakage, predict denial risk, and prioritize corrections, improving cash flow and reimbursement performance.
Why AnnexMed for IRF?
Real-Time 60% Rule Management, Not Quarterly Reconciliation
AnnexMed’s 60% Rule monitoring continuously tracks qualifying diagnosis ratios at the admission level. Proactive alerts trigger before thresholds are breached, not after periods end, helping protect IRF designation and ensure sustained compliance.
CMG Tier Capture That Directly Improves Reimbursement
Our IRF-PAI review and comorbidity improves CMG tier capture. Uncaptured Tier 2 or 3 conditions represent reimbursement. Integrated CDI surfaces documented conditions in review, recovering revenue without altering documentation.
Preadmission Screening Built Into Admission, Not Audited After
Deficient preadmission screening is the most common IRF denial. AnnexMed embeds compliance into admissions by ensuring prior function, therapy tolerance, and rehab goals are complete before finalization, turning audit risk into a proactive compliance process.
Physician Visit Tracking Across the Full Census
Our physician visit monitoring tracks 3x/week compliance across every IRF patient in the active census population daily. Real-time alerts flag gaps before they occur, eliminating documentation failures that lead to prepayment review risk and operational disruption.
IRF QRP Protection & Market Updates
AnnexMed manages IRF quality reporting to protect the market basket update. A 2% QRP penalty on facilities creates loss until restored. We treat QRP as a managed compliance function, not a billing task.
Therapy Billing: PT, OT, SLP Workflow
PT, OT, and SLP billing in one unified workflow ensures three-hour daily therapy is documented and billed completely. No gaps in records, every session captured, and revenue codes applied accurately.
AI-Powered IRF Revenue Intelligence
AnnexMed’s AI predicts CMG errors, flags IRF-PAI vs UB-04 mismatches, finds missing comorbidities, tracks therapy gaps, and alerts on visit trends before compliance risk in IRF billing workflows proactively.
AnnexMed's IRF implementation approach
60% Rule Baseline
We establish the qualifying diagnosis ratio across the Medicare census to identify compliance and potential admission risks early.
IRF-PAI Audit
We audit IRF-PAI accuracy, CMG capture, and submission compliance to identify revenue recovery opportunities proactively.
Visit Compliance
We configure physician visit and therapy monitoring workflows with proactive real-time alerts before compliance gaps occur.
Concurrent Billing
CMG billing, therapy coding, authorization, denials, and CDI workflows activate with complete IRF-PAI submission workflow alignment.
QRP Compliance
QRP reporting, 60% Rule monitoring, and continuous compliance reviews are fully integrated into ongoing IRF billing workflows.
Optimize Your IRF Revenue Cycle
Trusted by 100+ Healthcare Providers | AAPC, AHIMA & AAHAM Certified | SOC 2 Type II | All 50 States
Case Studies
See the impact we deliver
Discover how AnnexMed reduces denials, accelerates reimbursements, and strengthens financial performance. Backed by measurable outcomes and proven RCM expertise, we deliver operational excellence, revenue stability, and sustainable growth you can trust.
Client Voices
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Proven RCM expertise. Delivered at scale.
For over 20 years, AnnexMed has delivered RCM solutions nationwide, combining expert billing, coding, and AR support to drive measurable results and growth.
- 20+ years of proven healthcare RCM experience
- 2,000+ professionals supporting billing, coding & AR
- 500+ certified coders across multiple specialties
- 99%+ compliance with HIPAA and security standards
- All 50 states served with consistent, scalable operations
