Introduction
An infectious disease physician manages a patient on a six-week OPAT course, coordinates with a home infusion partner, and documents weekly reviews for a drug that costs thousands per dose. Three months later, the claim is still sitting in accounts receivable.
This is not unusual. Revenue cycle management spans everything from patient registration to final payment, according to HFMA's RCM overview.
Infectious disease practices touch nearly every stage of that chain, often across multiple payers and partners for a single course of care.
Accounts receivable consulting finds where revenue actually gets stuck and fixes the workflow that put it there, rather than simply chasing unpaid claims harder.
This article covers what that consulting looks like for infectious disease practices, why ID-specific AR tends to age, the metrics worth tracking, and how to evaluate outside help.
Key Takeaways
- AR consulting diagnoses root causes across claims, payers, and workflows, not just unpaid balances.
- Infectious disease practices need AR broken out by service line, payer, and denial reason, not one blended number.
- A strong consultant delivers a prioritized plan, documented assumptions, and clear PHI safeguards.
- Reimbursement and costs vary by contract and geography, so practices should analyze their own data.
What Does Accounts Receivable Consulting Include for an Infectious Disease Practice?
These terms get used interchangeably, but they describe different work:
| Term | What it actually means |
|---|---|
| Accounts receivable | Billed amounts owed to the practice that haven't been paid yet |
| AR follow-up | Checking claim status and resolving specific denied or unpaid claims |
| Medical billing | The operational process of submitting claims and processing payments |
| Revenue cycle management | The full path from registration through final payment and reporting |
| AR consulting | An outside review that diagnoses why balances stay open and recommends fixes |
A consultant's job is to find the cause, not just increase call volume to payers. That means examining the full chain: charge capture, coding and documentation, claim submission, payer edits, remittance posting, denials, appeals, patient balances, credits, refunds, and write-offs.
Scope Shifts by Service Line
The review looks different depending on what's being billed:
- Office visits - documentation support for E/M level, eligibility verification
- Inpatient consultations - coordination with hospital billing and facility contracts
- OPAT oversight - authorization tracking across weeks of therapy
- Infusion and buy-and-bill - drug acquisition cost tied to claim timing
- Hospital or facility contracts - compliance with negotiated payment terms
GrowInfectiousDisease's Revenue Cycle Management (RCM) Strengthening service, for example, reviews this entire chain (documentation, authorization, drug and infusion billing, denials, and payer contracts) rather than treating AR as a single follow-up task.
A consultant should segment AR by payer, service line, provider, claim status, aging bucket, and denial cause before drawing any conclusions. Before anyone changes a billing workflow, check current CMS, payer, and coding guidance. Assumptions from last year's rules don't hold.
Why Infectious Disease Practices May Develop Aged or Uncollected AR
ID billing involves more moving parts than most specialties: referring hospitals, facility partners, commercial insurers, Medicare or Medicaid, infusion or home-health partners, laboratories, and the patient. Every added party is another place a claim can stall.
Service-Line Complexity
OPAT requires coordination across orders, authorizations, documentation, and recurring claims to an infusion or home-health partner. Buy-and-bill adds drug-acquisition cost and inventory risk on top of that: the practice pays for the drug before it's reimbursed.
Front-End, Clinical, and Back-End Causes
Front-end issues:
- Incomplete demographic or insurance information
- Eligibility gaps or missing authorizations
- Incorrect payer routing or enrollment problems
Clinical and coding issues:
- Incomplete documentation or missing medical-necessity support
- Mismatched diagnoses and procedures
- Charge capture that doesn't reflect services delivered
Back-end issues:
- Unposted remittances and unapplied cash
- Missed appeal deadlines
- Insufficient follow-up ownership
A single unresolved authorization shows this clearly. One infusion drug requires reauthorization mid-course. If that renewal is missed, the next claims may deny even though therapy continued without interruption, and the gap can span weeks of billing before anyone notices the pattern.
GrowInfectiousDisease's Infusion & OPAT Economics Calculator models these cost categories (drug acquisition, nursing time, coordination hours) so practices can see where an authorization gap actually hits the ledger.
Don't assume a high AR balance is a billing-staff problem. The diagnosis needs to look at documentation, contracting, scheduling, authorizations, technology, and payer behavior together, not just the people making follow-up calls.
How an Accounts Receivable Consulting Engagement Works
A real engagement moves through defined phases, not a single audit.
- Discovery - Define goals, service lines, payer mix, systems, staffing, and the current age and composition of AR.
- Data request - Pull aging reports, claim-level status, remittance data, denial reports, payment-posting logs, payer contracts, and authorization records.
- Data validation - Check for duplicate accounts, unapplied cash, credit balances, and mismatches between the practice-management system and accounting records before trusting any number.
- Diagnosis - Quantify where balances accumulate, identify root causes by payer and service line, and rank opportunities by financial impact and effort.
- Remediation - Assign owners, build escalation and appeal workflows, clarify authorization requirements, and define when balances get written off versus transferred to patient collections.
- Monitoring - Track aging movement, denial trends, and payment lag on a recurring basis.
Internally, this looks like a queue with one named owner and a named backup, reviewed daily for anything past target — with escalation to peer-to-peer review when needed.
Questions to Ask Before Signing
- What work is advisory versus performed directly by the consultant?
- Who contacts payers — the practice or the consultant?
- How is success measured, and how often is it reported?
- How are recommendations documented?
- Does the engagement avoid unsupported coding or billing changes?
Which AR Metrics Should an Infectious Disease Practice Review?
A single collections percentage hides too much. Infectious disease practices need several measures viewed together.
Core measures to track:
| Metric | What it shows |
|---|---|
| Days in AR | How long balances sit before payment, using net AR divided by average daily revenue |
| AR aging | Balances grouped by how long they've been outstanding |
| Gross/net collection rate | Collected revenue against charges, before and after contractual adjustments |
| Charge lag | Time between service date and charge posting |
| Clean-claim rate | Share of claims passing payer edits on the first submission |
| Denial rate | Actionable denied claims as a share of claims remitted |
Denial rates deserve extra scrutiny in ID. First-submission denial rates have held around 7% to 8% across medical practices for four straight years, according to MGMA's 2026 report. But that figure isn't ID-specific, and it's not the same as a remittance-based denial rate. Comparing mismatched definitions leads to the wrong conclusions.
Why ID-Specific Segmentation Matters
A single denied drug claim can carry more dollar risk than a month of office visits. That's why denial rate measured in dollars, not just claim count, matters more in an infusion-heavy practice. Track these separately:
- Office consultation vs. OPAT vs. infusion vs. buy-and-bill
- Payer-level authorization rules, claim edits, and remittance formats
- Percentage of claims missing required authorization
- Unresolved credit balances and unapplied payments
- Claims approaching filing or appeal deadlines
Set a baseline using your own practice's numbers, pick two or three priorities, and watch the trend. Don't react to one bad month.
How to Choose an Accounts Receivable Consultant
Match the engagement model to your capacity and the problem you need solved, then verify specialty fit, deliverables, and compliance before you sign.
Compare Engagement Models
| Model | Best fit |
|---|---|
| Internal improvement project | Practice has time and some audit capability in-house |
| Independent consultant | Needs a bounded diagnosis and remediation plan |
| Specialized RCM advisor | Complex infusion, OPAT, or payer issues |
| Billing company with consulting | Wants recurring claims work plus strategy |
| Technology-enabled service | Wants tool-supported execution with visibility |
What to Verify Before Signing
- Specialty relevance: Does the consultant understand OPAT, infusion, buy-and-bill, and facility relationships specific to ID?
- Deliverables: Data-quality assessment, root-cause analysis, prioritized plan, and a reporting cadence.
- Compliance and security: Business associate agreements, minimum-necessary PHI access, and role-based permissions. HHS's Security Rule requires administrative, physical, and technical safeguards before any consultant touches patient data.
- Fee structure: Fixed project fee, hourly advisory work, or percentage-based arrangement: confirm what's included before committing.
- References: Ask for a sample anonymized report and confirm who owns the work product.
Those checks matter most when the timing is right. A practice is ready for outside help when AR keeps aging without explanation, denials recur without a fixed root cause, or leadership can't get reliable financial reporting for decisions.
Resources like GrowInfectiousDisease's Practice Health Check can surface these signals before you commit to a paid engagement.
Frequently Asked Questions
What are some effective pricing strategies for revenue management?
Pricing should reflect your actual payer contracts, service costs, and documented financial policies, not a generalized industry figure. Validate current contract terms before setting patient-responsibility or collection policies.
What is included in revenue cycle management?
RCM covers registration, eligibility, authorization, charge capture, coding, claim submission, payment posting, denial management, payer follow-up, patient collections, and reporting. It's the entire financial path, not one task.
Is revenue cycle management the same as billing?
No. Billing is one piece of RCM. RCM covers the full process from patient registration through final payment, reconciliation, and reporting. Billing is just the claims-submission step.
How can an infectious disease practice reduce aged accounts receivable?
Start with an aging analysis by payer and service line, then trace root causes. Fix front-end workflows, post payments accurately, document escalation rules, and review trends regularly instead of reacting month to month.
When should an infectious disease practice hire an accounts receivable consultant?
Persistent aging, recurring denials without a clear fix, unclear performance by service line, or unexplained cash-flow swings are all signals worth an objective outside review.
