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
Acute Care Billing for Hospitals
Institutional RCM for High-Volume Hospital Billing Systems
AI-enabled revenue execution with measurable financial impact across DRG optimization, denial reduction, underpayment recovery, and revenue integrity.
~5,100
Acute Care
Hospitals
$1.1T+
Annual
Hospital Revenue
10–15%
Average
Denial Rate
3–5%
Revenue Lost to Charge Leakage
Why RCM performance matters here?
Key RCM challenges in acute care hospitals
DRG Optimization & Clinical Documentation
MS-DRG reimbursement depends on diagnoses, CC/MCCs, and procedures. Without strong CDI, hospitals under-capture complexity, lowering DRGs and revenue. AnnexMed CDI specialists work with coders to query physicians and ensure DRGs reflect clinical severity.
Observation vs. Inpatient Status
In hospital billing, deciding inpatient vs observation status is critical. The Two-Midnight Rule guides this, but consistent application is often challenging. Errors lead to denials, RAC audit exposure, and patient liability issues, directly impacting reimbursement and regulatory compliance outcomes.
Chargemaster (CDM) Management & Charge Leakage
The Chargemaster is the master price list for all hospital services, supplies, and drugs. An outdated or inaccurate CDM causes charge leakage, billing errors, NCCI edit failures, and claim rejections. Hospitals can lose 3–5% of revenue annually due to weak charge capture processes.
High-Volume Denial Management
Large acute care hospitals face thousands of denials monthly across inpatient, outpatient, and emergency care. Without denial management by payer and root cause, rates rise and overturns fall. AnnexMed uses analytics to stratify denials and route appeals automatically
Payer Contract Underpayment
Hospitals manage 200+ payer contracts with complex terms. Underpayments often go undetected without monitoring. AnnexMed compares remittance data to contracted rates on every claim, flagging variances for recovery and improving revenue capture.
Authorization & Medical Necessity Documentation
Prior authorization failures are a leading cause of hospital denials, especially for elective surgeries, imaging, and admissions. Medical necessity must meet clinical, payer, and regulatory standards. AnnexMed manages the full authorization lifecycle and provides concurrent review to prevent denials.
Two-Midnight Compliance & Case Management
Medicare’s Two-Midnight Rule requires physician certification for inpatient admissions. Case management must monitor status throughout stay. Non-compliance leads to denials and RAC audit risk. AnnexMed provides case management billing support and concurrent status review.
Price Transparency & Patient Financial Experience
CMS price transparency rules require hospitals to publish machine-readable charge files and consumer-friendly service pricing. Non-compliance leads to penalties. AnnexMed ensures compliance and provides financial counseling to improve patient satisfaction and reduce write-offs.
UB-04 Institutional Billing
End-to-end claim preparation, submission, and follow-up for all inpatient and outpatient facility claims using the UB-04 claim form with accurate TOB, revenue codes, and condition codes.
Inpatient DRG Coding & Optimization
Expert ICD-10-CM/PCS coding with concurrent CDI review to ensure MS-DRG assignment accurately reflects true clinical complexity, maximizing appropriate reimbursement outcomes.
Outpatient APC/OPPS Billing
Ambulatory Payment Classification billing under OPPS, including packaging rule compliance, modifier application, and comprehensive APC optimization strategies and workflows.
Clinical Documentation Improvement
Concurrent and retrospective CDI queries to physicians, ensuring documentation supports CC/MCC capture and accurate DRG assignment across all inpatient cases.
Case Mix Index (CMI) Improvement
Systematic CDI and coding audit programs improve CMI. AnnexMed clients average a 0.15 to 0.25 increase within 12 months, translating to millions in additional Medicare reimbursement.
Chargemaster (CDM) Management
Periodic CDM audits, revenue code mapping, HCPCS/CPT updates, and accurate charge reconciliation to eliminate charge leakage and ensure end-to-end billing accuracy.
Prior Authorization Management
Full PA lifecycle management including initiation, tracking, peer-to-peer coordination, and retrospective authorization support for emergent admissions across all payer types.
Denial Management & Appeals
Root-cause denial analytics, stratified appeals management, clinical documentation support for complex medical necessity appeals, and structured payer escalation pathways.
Payer Underpayment Recovery
Automated contract rate comparison on every remittance, flagging underpayments for recovery with payer-specific dispute resolution workflows and variance tracking insights.
Observation Status Management
Two-Midnight Rule compliance support, observation billing, MOON notice tracking, and Condition Code 44 management to ensure patient status, reduce denials, and maintain compliance.
Revenue Integrity Auditing
Proactive internal audits of charge capture, coding accuracy, and billing compliance to prevent RAC and OIG audit recoveries before they occur and reduce future compliance risk.
Medical Necessity Review
Concurrent and prospective medical necessity documentation review aligned with InterQual/Milliman criteria and payer-specific policies and guidelines requirements.
Self-Pay & Charity Care Processing
Presumptive eligibility screening, Medicaid conversion, financial assistance determination, and patient payment plan management with eligibility verification support and automation.
Patient Financial Counseling
Upfront cost estimation, insurance verification, financial assistance navigation, and post-service billing support for patients with enhanced communication, transparency, and engagement.
Case Management Billing Support
Status determination coordination, discharge planning billing, readmission avoidance documentation, and SNF/home health transition billing support and coordination.
Key billing & coding reference
Billing Dimension
Detail & AnnexMed Approach
Claim Form
UB-04 (CMS-1450) institutional claim form for all hospital facility billing
Inpatient Reimbursement
MS-DRG under IPPS; 758 DRG groups; outlier payments for high-cost cases
Outpatient Reimbursement
Ambulatory Payment Classifications (APCs) under OPPS; packaging rules apply
Key Revenue Codes
010X–099X; room & board, ICU, pharmacy, lab, imaging, therapy, OR, etc.
Core Coding Systems
ICD-10-CM (diagnoses), ICD-10-PCS (inpatient procedures), CPT, HCPCS Level II
Condition Codes
18 = leave of absence; 44 = inpatient to outpatient conversion; 41–48 series
Value Codes
Used for deductibles, coinsurance, MSP, transplant costs; required for specific scenarios
Quality Programs
VBP, HRRP, HAC Reduction Program collectively can adjust Medicare payment ±4%
Payer Mix (National Avg)
Medicare ~45%, Medicaid ~20%, Commercial ~30%, Self-Pay/Uninsured ~5%
Top Audit Programs
RAC, MAC, OIG Work Plan, CERT targeting DRG coding, status, medical necessity
Key Denial Types
Medical necessity, inpatient status, authorization failures, duplicate claims, coding errors
Price Transparency
Machine-readable file (MRF) + 300 shoppable services required by CMS; penalties $10/day+
Improved DRG accuracy and CMI
AnnexMed's CDI program averages a 0.15 to 0.25 increase in Case Mix Index within 12 months, translating to $2 to $5M in additional appropriate Medicare reimbursement for a 200-bed hospital.
Denial Rate Reduction of 20–30%
Hospital billing teams trained exclusively on UB-04 institutional workflows reduce initial denial rates by 20–30% compared to generalist billing companies reassigning physician staff to facility claims.
3–7% underpayment recovery
Proprietary underpayment detection compares every remittance against contracted rates. Clients consistently recover 3–7% net revenue from undetected commercial payer underpayments.
Days in A/R Reduction of 12–18 Days
AnnexMed's average Days in A/R reduction for acute care clients is 12–18 days within the first 6 months, delivering measurable cash flow improvement that directly supports capital planning.
Stronger revenue integrity
Proactive internal audit programs prevent RAC and OIG audit recoveries before they occur, reducing financial exposure and keeping billing practices aligned with current CMS requirements.
Price Transparency Compliance
AnnexMed's compliance management service keeps hospitals current with CMS mandates, avoiding penalties while improving patient financial experience and collection rates.
Why hospitals choose AnnexMed?
AnnexMed's implementation approach
Assessment and
Baseline
90-day current state audit: denial analysis, CDM review, CDI gap assessment, and A/R aging review
Infrastructure
Setup
Workflow integration, system access, payer enrollment, team onboarding and training support
Concurrent
Optimization
CDI, charge capture, and PA management fully active alongside live billing operations seamlessly
Denial Reduction Program
Root-cause stratification, targeted appeals, and payer escalation protocols management
Reporting and
Governance
Monthly KPI review, quarterly strategy sessions, and annual contract renegotiation support
Optimize Hospital Revenue Growth
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
See how our clients succeed
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
- 1,500+ 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
