AnnexMedAnnexMedAnnexMed
Corporate Office
USA
299 S. Main Street
Suite 1300
Salt Lake City, UT 84111
Chennai - Tower I
CeeDeeYes Tyche Towers,
Block-1 3rd Floor, Perungudi Bypass Rd, Perungudi,
Chennai - 600096
Chennai - Tower II
4th Floor, IIFL TOWERS
MGR Main Rd,
Perungudi, Chennai - 600096
Villupuram
No 9, Viswalingam Layout
Villupuram,
Tamil Nadu – 605602

Facility Coding Services

Facility Coding is a Revenue Integrity Discipline, Not a Back-Office Function

AI-enabled facility coding execution built for hospitals, health systems, and ambulatory facilities, delivering DRG accuracy, APC precision, and audit-ready compliance at scale.

98.5%+

Coding Accuracy

45%

Reduction in Coding Costs

32%

DNFB Reduction

99.1%

Client Retention Rate

What is facility coding and why does it define your financial performance?

Facility coding translates clinical documentation into ICD-10-CM, ICD-10-PCS, CPT, and HCPCS codes that drive reimbursement, payer performance, and compliance across healthcare organizations. Unlike professional coding, it captures all resources used, including nursing, surgery, drugs, implants, and diagnostics. Each code has direct financial impact on outcomes and revenue.
AnnexMed delivers AI-enabled facility coding for complex hospital operations. Credentialed coders, supported by CAC and multi-layer QA, efficiently manage DRG, APC, ED, and same-day surgery coding. The result is audit-ready coding that protects revenue, reduces denials, and speeds cash flow.
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Schedule a Facility Coding Audit | Ensure Accuracy

Trusted by 100+ healthcare providers | AAPC, AHIMA & AAHAM Certified | SOC 2 Type II

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The financial imperative

What coding errors are costing your organization?

Facility coding is not an administrative task, it is the financial foundation of your hospital’s revenue cycle. Errors in DRG assignment, documentation capture, and APC grouping create compounding losses that extend far beyond the original claim.

DRG Misclassification

Every incorrectly assigned DRG compresses your Case Mix Index. A systematic CMI decline signals lost revenue at scale, affecting payer contract benchmarks, cost report accuracy, and annual reimbursement projections. Even small DRG weight variances, repeated across thousands of encounters, produce material financial impact.

Missed CC/MCC Capture

Complication and comorbidity documentation is where the greatest facility coding revenue is left uncaptured. When secondary diagnoses are coded at lower severity levels, or omitted entirely, the resulting DRG assignment understates overall care complexity and undervalues every affected encounter significantly.

Coding-Driven Denials

Coding errors are the leading root cause of facility claim denials. A single miscoded procedure, incorrect principal diagnosis selection, or APC grouping error triggers payer rejection, rework cost, and delayed cash flow, with compounding interest in the form of aged AR and write-off risk.

DNFB Accumulation

Discharged Not Final Billed accounts represent cash the hospital has earned but cannot collect. Coding backlog is the most common DNFB driver. Every day a chart sits uncoded is a day of cash flow delay — with downstream effects on working capital, covenant ratios, and CFO reporting.

Compliance and Audit Exposure

RAC auditors, MAC reviewers, and OIG scrutiny target facilities with inconsistent CMI trends, DRG patterns, and documentation gaps. Inaccurate coding creates overpayment risk, repayment demands, and exposure, all preventable with structured compliance coding discipline.

Revenue Recognition Gaps

Correct DRG assignment, APC grouping, and diagnosis capture are prerequisites for accurate revenue recognition. When coding is inconsistent, finance leadership cannot trust the numbers driving line profitability analysis, payer contract negotiations, or capital planning decisions.

Scope of services

Comprehensive facility coding: every encounter type, every specialty

AnnexMed provides full-spectrum facility coding across inpatient, outpatient, and specialty encounter types, with dedicated expertise in the coding areas that carry the greatest financial and compliance weight for your organization.

Inpatient Facility Coding

ICD-10-CM diagnosis coding, ICD-10-PCS procedure coding, MS-DRG and APR-DRG assignment, CC/MCC capture and optimization, high-acuity and surgical case coding, secondary diagnosis capture, POA indicator assignment, and principal diagnosis sequencing.

Outpatient Facility Coding

CPT procedure coding, HCPCS Level II coding, APC grouping, E&M level assignment for hospital outpatient visits, observation status coding, same-day surgery and outpatient procedure coding, and modifier application for compliant billing.

Emergency Department Coding

Facility-level ED E&M level assignment, critical care coding, medical screening exam documentation review, high-complexity visit coding, trauma activation coding, and ED-to-inpatient admit coding continuity to prevent split-billing compliance exposure.

Ambulatory Surgery Center Coding

ASC-specific procedure coding under APC guidelines, correct APC grouping for bundled and separately payable procedures, implant and supply billing accuracy, modifier compliance, and same-day surgery documentation review aligned to ASC reimbursement rules.

DRG Optimization & Validation

Prospective DRG review prior to claim submission, CC/MCC opportunity identification, documentation gap alerts for physicians, alternative DRG analysis for higher-weighted assignments, and pre-bill audit to catch errors before submission.

Audit Defense & Backlog Coding

Denial-driven recoding for active appeals, coding rationale documentation for RAC and MAC responses, clinical record review for audit defense, and backlog clearance teams deployed to eliminate DNFB accumulation within defined SLA windows.

AI-Enabled coding execution

How AnnexMed combines human expertise with AI-Assisted precision?

AnnexMed is not a traditional outsourcing vendor. We have built proprietary AI capabilities directly into our facility coding workflows, accelerating throughput, improving accuracy, and enabling proactive revenue protection at a scale that credential-only teams cannot match.

Computer-Assisted Code Suggestion

Our AI coding engine analyzes clinical documentation and suggests ICD-10 and CPT codes in real time, reducing coder lookup time, flagging documentation gaps before submission, and ensuring coding decisions are grounded in the full clinical picture, not just the discharge summary.

Documentation Gap Detection

AI-powered documentation review identifies missing diagnoses, unsupported procedures, and physician query opportunities before the claim is coded. This closes the CDI loop automatically, capturing CC/MCC opportunities that manual review consistently misses at scale.

QA Automation & Accuracy Monitoring

Automated quality checks flag inconsistencies, DRG weight anomalies, and compliance risk patterns across all encounters. Real-time dashboards give your HIM leadership full visibility into coder performance and coding quality trends, without waiting for monthly reports.

Productivity Acceleration

AI-assisted coding workflows reduce average chart completion time while maintaining accuracy above 98.5%. Higher throughput compresses your DNFB window and reduces the cost-per-coded-encounter, delivering measurable operational efficiency gains without sacrificing quality.

Denial Pattern Analytics

Our AI engine analyzes denial data across all payers and encounter types, identifying root-cause coding patterns, grouper issues, and documentation deficiencies. This converts reactive denial management into proactive prevention, reducing recurrence rates systematically.

Revenue Integrity Monitoring

Continuous AI-driven monitoring of your CMI trends, DRG weight distributions, and APC grouping patterns identifies revenue leakage before it becomes a reporting problem. Finance and revenue integrity leaders receive actionable intelligence, not historical data that arrives too late to act on.

Who we serve?

Facility coding expertise across every healthcare setting

AnnexMed serves physician practices, hospital-based groups, multispecialty clinics, and medical billing companies bringing specialty-matched coding expertise and a compliance-first approach to every engagement, regardless of organizational size or complexity.

Acute Care Hospitals

Full-spectrum inpatient and outpatient highly comprehensive, accurate, and compliant facility coding for short-term acute care hospitals across all clinical service lines and payer types.

  • IP-DRG
  • MS-DRG & ED
  • Observation

Teaching Hospitals

Complex coding environments requiring precise documentation of resident supervision, teaching physician attestation, and compliance with GME billing regulations.

  • GME Compliance
  • Supervision Rules
  • Teaching Physician Rules

Skilled Nursing Facilities

SNF coding fully aligned to Patient-Driven Payment Model requirements, ensuring accurate MDS coding, clinical category assignment, and compliant therapy utilization documentation.

  • PDPM
  • MDS Coding
  • Clinical Category Assignment

RHC & FQHC

Facility coding for federally qualified health centers and rural health clinics under PPS and encounter-rate reimbursement models with UDS reporting compliance.

  • FQHC PPS
  • Encounter-Based Billing
  • UDS Reporting

Critical Access Hospitals

Specialized coding expertise navigating CAH-specific reimbursement structures, cost report implications, and rural provider billing complexity.

  • CAH Billing
  • Cost-Based Reimbursement
  • Rural Health

Long-Term Acute Care

LTACH coding under the LTACH Prospective Payment System including diagnosis capture and ventilator documentation.

  • LTACH PPS
  • IRF-PAI
  • High-Acuity Coding

Ambulatory Surgery Centers

Same-day surgery and outpatient procedure coding under ASC guidelines correct APC grouping, modifier use, and implant billing accuracy.

  • APC Grouping
  • Same-Day Surgery
  • Implant Coding

Multi-Hospital Systems

Scalable, standardized facility coding operations across multiple facilities and markets with enterprise-level reporting and system-wide quality oversight.

  • Centralized Coding
  • System Standardization
  • Enterprise Reporting

Compliance & quality infrastructure

Audit-ready coding is not a goal, it is the operating standard

AnnexMed’s facility coding infrastructure is built around one principle: every coded claim must be defensible under audit scrutiny. Our quality systems, credentialing standards, and compliance frameworks are not added on, they are embedded in every coding workflow.

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AAPC & AHIMA Credentialed Coders

Every facility coder holds active AAPC or AHIMA credentials, including CCS, CPC, COC, or RHIA, with facility-specific experience validated before client assignment. No generalist coders are placed on facility accounts.

Multi-Layer QA Audit Process

A minimum 10% random audit per coder per month, with targeted 100% audits on high-risk encounter types and new coder onboarding periods. Audit results feed individual coder coaching and team-wide process calibration.

Ongoing Coder Education

Monthly coding updates, AHA Coding Clinic reviews, CMS transmittal monitoring, and mandatory CEU requirements consistently keep our coders current with every regulatory change, before it affects claim accuracy.

External Audit Defense Support

When RAC, MAC, or OIG audit requests arrive, our compliance team supports your internal team with documentation retrieval, coding rationale preparation, and appeal package development, reducing response burden on your staff.

HIPAA Compliance & Data Security

All workflows, file transfers, and data storage adhere to HIPAA Privacy and Security Rule requirements. SOC 2 Type II certified. Agreements executed prior to onboarding. EHR access governed by facility-defined protocols.

CMS & Payer Compliance

Our coders follow official UHDDS definitions, ICD-10 Official Guidelines, and payer-specific billing rules, with dedicated payer policy monitoring to ensure compliance as LCD determinations, coverage rules, and OPPS grouper updates are released.

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Engagement Models

Flexible coding structures built around your organization

AnnexMed does not offer one-size-fits-all coding contracts. Our engagement structures are designed to meet your organization where it is, whether you need immediate backlog relief, long-term operational partnership, or a scalable hybrid structure that grows with your volume.

Full Outsourcing

AnnexMed assumes responsibility for coding operations, from medical record queue management through coded claim release. We replace or supplement your team with credentialed coders working within your EHR environment.

Hybrid Staffing

Your in-house coders retain ownership of defined encounter types or service lines while AnnexMed provides credentialed support for overflow, complex case types, high-acuity specialties, or extended-hour and weekend coverage.

Backlog Clearance Projects

A time-bound engagement focused on eliminating an existing backlog, deployed with surge capacity, defined DNFB reduction targets, weekly leadership reporting, and a clear exit ramp back to steady-state operations.

Short-Term Stabilization

Immediate coding coverage during staff vacancies, EHR migrations, facility acquisitions, or service line expansions, with rapid deployment timelines and minimal onboarding friction to prevent revenue cycle disruption.

Scalable FTE Model

A subscription-style engagement that scales coding FTEs up or down based on patient volume, seasonal demand, or strategic growth, without the fixed cost of permanent headcount or the HR complexity of employment.

Revenue Integrity Audit Engagements

Retrospective coding accuracy audits to identify CMI compression, DRG optimization opportunities, unbundling exposure, and documentation priorities, delivered as a revenue integrity service.

Performance outcomes

Results our clients consistently achieve

These are outcomes measured across active hospital and health system engagements, not projections. AnnexMed clients see verifiable improvement in the revenue cycle metrics that matter most to healthcare finance and HIM leadership.
98.5 %+
Coding Accuracy Rate
Consistently maintained across all facility types and encounter complexities, verified through monthly independent internal audit protocols.
45 %
Reduction in Coding Costs
Operational coding cost reduction achieved through AI-assisted workflow efficiency, productivity acceleration, and elimination of overtime and expense.
32 %
DNFB Account Reduction

Average reduction in Discharged Not Final Billed balances within 90 days of engagement start, compressing the coding-to-cash timeline.

72 %+
Productivity Improvement
Average throughput increase per FTE when AI-assisted coding workflows are strategically deployed alongside highly credentialed facility coders.
36 %
Reduction in Aged AR

Clean, timely coding submission accelerates payer adjudication cycles, reducing accounts aging beyond 90 days and write-off exposure.

99.1 %
Client Retention Rate

Sustained across 20+ years of healthcare-only RCM operations, reflecting the consistency and reliability of our coding performance delivery.

Frequently Asked Questions

What is the difference between facility coding and professional fee coding?
Facility coding captures hospital resources used during an encounter, including nursing, surgery, supplies, drugs, and diagnostics, using ICD-10-CM, ICD-10-PCS, CPT, and HCPCS codes that directly drive facility reimbursement outcomes. Professional coding captures provider work separately. Both are essential, but follow distinct regulatory guidelines, code sets, and payer rules.
Which EHR systems does AnnexMed support for facility coding?
Our coders work directly within your EHR environment, Epic, Oracle Health (Cerner), MEDITECH, Allscripts, Athena, and other major platforms. We operate within your existing system access protocols, security frameworks, and coding queue management tools, requiring no additional technology procurement or workflow disruption on your side.
How quickly can AnnexMed deploy coding support for a facility backlog?
For backlog clearance and stabilization engagements, we typically deploy credentialed facility coders within 5 to 10 business days of contract execution, depending on EHR access provisioning and facility-specific onboarding requirements. Surge capacity can be scaled rapidly once the initial team is established and productive.
How does AnnexMed maintain coding accuracy across high-volume facility accounts?
Our accuracy assurance infrastructure operates at three levels: AI-assisted coding validation at the point of code assignment, structured peer review for complex and high-acuity encounters, and a formal monthly audit protocol targeting a minimum 10% random sample per coder, with 100% audit coverage on designated high-risk encounter types. Results feed direct coaching and calibration.
Does AnnexMed provide clinical documentation improvement support alongside coding?
Yes. Our coding teams generate physician queries when clinical documentation is insufficient to support appropriate DRG assignment or secondary diagnosis capture. We also provide CDI opportunity reporting that identifies systemic documentation gaps by service line, physician, and encounter type, giving your CDI program actionable data rather than anecdotal case examples.
What specialties does AnnexMed's facility coding comprehensively cover?
Our coders cover the clinical spectrum including cardiology, orthopedics and spine surgery, general surgery, oncology, neurosurgery and neurology, gastroenterology, trauma and critical care, obstetrics and gynecology, behavioral health, radiology, nephrology, pulmonology, and subspecialties requiring facility-level coding expertise.
How does AnnexMed support organizations during RAC or MAC audits?
When audit requests arrive, our compliance team works with your HIM and compliance staff. We support documentation retrieval, prepare coding rationales, assist with appeal development, and provide analysis of disputed coding decisions. Our goal is to reduce burden while strengthening the defensibility of every response submitted.
How does AnnexMed ensure consistency and quality across facility coding operations?
AnnexMed ensures coding quality through standardized workflows, specialty-aligned coders, and multi-layer QA. Each encounter is reviewed against ICD-10-CM, ICD-10-PCS, CPT, HCPCS, and payer guidelines for accurate DRG and APC assignment. High-risk cases receive added review, and audits track performance and variation, ensuring consistent coding accuracy and strong revenue integrity.
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Start with a complimentary coding assessment

Discover where DRG misclassification, documentation gaps, and coding errors are costing your organization revenue. Our experts review your coding operations and deliver a clear action plan.

Let's talk about your goals.

Request your coding assessment

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

Hear from organizations that trust AnnexMed to reduce denials, accelerate reimbursements, and strengthen cash flow. Our expert support delivers measurable performance gains, operational efficiency, financial stability, and scalable growth.

Our collections were stuck at 85% for years and we couldn't figure out why. AnnexMed audited our revenue cycle, found leaks, and restructured workflow end to end. Within six months, collections climbed to 97% and days in AR dropped nearly half. They turned our revenue cycle around.
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Dr. Thomas Whitfield

Atlantic Internal Medicine Group
We were juggling four vendors for billing, coding, credentialing, and AR recovery. AnnexMed consolidated everything under one roof and the difference was immediate. Cleaner claims, faster reimbursements, and transparency into every dollar. For the first time, I trust numbers I am looking.
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Dr. Nisha Kapoor

Prestige Women's Health and Wellness
Revenue cycle management felt like a black hole before AnnexMed. Claims went out and we hoped for best. Now we have real-time dashboards, proactive denial management, and a team that treats our revenue like their own. Our net collections improved 23% in the first quarter and have stayed consistent since.
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Mark Sullivan

Crestline Multi-Specialty Health System

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
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