Why Are Optometry Practices Missing Their Days in AR Benchmarks?

Optometry practices are missing their Days in AR Benchmarks because three compounding billing failures — vision-versus-medical plan misclassification, NCCI diagnostic bundling errors, and legacy ICD-10 coding after the October 2025 code update — are stalling claims in payer queues long after payment should have arrived.

The national average sits at 35–40 Days in AR across eye care; high-performing optometry practices maintain under 28 days. For a multi-provider practice with $2M in annual allowable charges, every extra 10 days in AR represents $54,000 or more in delayed working capital — capital that cannot fund staff, equipment, or practice expansion while it sits in a payer queue.

The Three Billing Failures Behind Missed Days in AR Benchmarks

Unlike primary care, optometry operates across two parallel insurance ecosystems simultaneously — medical plans and vision plans — and the revenue cycle must execute flawlessly in both or Days in AR Benchmarks slip. Most practices running above 35 days share the same three root causes:

1. Chief Complaint Misclassification at Intake

When a patient presents with floaters, diabetic eye disease, or ocular pain, the correct billing destination is the medical insurance plan — reimbursing $120–$180 per encounter. Practices that default to the vision plan for the same encounter collect $45–$70.

For a group seeing 30 patients daily, this systematic misclassification costs $200,000–$275,000 in annual collections — and because under-billed claims settle quickly at the wrong rate, they appear to improve Days in AR while actually suppressing Net Collection Ratio. The metric looks better; the practice is losing more.

2. NCCI Bundling Violations on Diagnostic Testing

The Medicare National Correct Coding Initiative (NCCI) creates hard bundling traps that most general billing systems are not equipped to catch. Billing OCT and fundus photography on the same date without documented separate medical necessity generates 8–12% denial rates on diagnostic testing alone.

These denials do not simply delay payment — they enter the appeal cycle, adding 21–45 days to AR aging per claim. Specialized optometry billing services with embedded NCCI edit monitoring catch these bundling conflicts before claims leave the practice.

3. Legacy ICD-10 Codes After the October 2025 Update

Effective October 1, 2025, CMS released 487 new FY 2026 ICD-10-CM diagnosis codes including 17 new eye and adnexa codes covering Demodex blepharitis, neovascular glaucoma, and thyroid eye disease (CMS FY 2026 ICD-10-CM Official Guidelines).

Practices still billing Demodex blepharitis with pre-October codes face automatic claim rejection across Medicare and commercial payers — converting routine encounters into AR aging events that inflate Days in AR within 30 days of implementation.

Days in AR Benchmarks: What the Numbers Actually Mean for Eye Care Revenue

Days in AR is not simply an operational metric — it is a direct measure of how many days of earned revenue are sitting outside your bank account. The formula is straightforward: Total AR divided by Average Daily Charges. But the interpretation requires specialty context.

Source: MBC Optometry Center of Excellence client data; HFMA benchmarks; MGMA DataDive

What 2026 Regulatory Changes Mean for Your Days in AR Benchmarks?

Two regulatory updates are compressing the margin for error in optometry billing this year — and both directly affect how quickly claims clear payer adjudication, which determines your Days in AR Benchmarks.

• CY 2026 MPFS Final Rule (effective January 1, 2026): CMS finalized two conversion factors — $33.57 for qualifying APM participants and $33.40 for non-qualifying practitioners (CMS CY 2026 PFS Fact Sheet). A concurrent −2.5% efficiency adjustment applies to non-time-based services including diagnostic imaging and procedures. Practices running above the Days in AR benchmark absorb both lower reimbursement and longer collection cycles simultaneously.
• FY 2026 ICD-10-CM Update (effective October 1, 2025): The CMS release of 487 new diagnosis codes, including 17 new eye and adnexa codes, means any practice billing Demodex blepharitis, neovascular glaucoma, or thyroid eye disease with pre-October codes is generating automatic claim rejections that inflate Days in AR. These rejections do not trigger manual review — they are systemic denials that pile into AR aging silently (CMS FY 2026 ICD-10-CM Guidelines).

Specialized rcm services for optometry practices update ICD-10 protocols the day CMS releases new codes — not 30 or 60 days later when claim rejections surface in your aging report.

The Three Operational Fixes That Move Days in AR Below 30

Fix 1: Deploy Chief Complaint Protocols at Intake

Every patient encounter must be classified to its highest-reimbursing eligible plan before the claim is built. A systematic Chief Complaint protocol — deployed at intake, not at claim submission — ensures that medical encounters billing at $120–$180 per exam are never defaulted to vision plans paying $45–$70. Practices implementing this protocol recover an average $55–$110 per patient encounter in previously abandoned revenue.

Fix 2: Automate NCCI Edit Monitoring by Procedure Pair

NCCI bundling violations on diagnostic testing — OCT with fundus photography, dark adaptation testing with comprehensive exams — are not avoidable through staff training alone. They require automated claim scrubbing that knows which procedure pairs require separate documented medical necessity on the same date. Optometry billing services with embedded NCCI logic reduce diagnostic denial rates from 8–12% down to below 2%, directly accelerating cash flow and compressing Days in AR by 7–12 days.

Fix 3: Implement CFO-Grade AR Visibility by Payer and Procedure

Monthly aggregate AR reports that reveal problems 45 days after they occur are not analytics — they are historical documentation. Effective rcm services for optometry groups provide real-time Days in AR segmented by payer, by provider, and by procedure type.

This segmentation identifies whether AR aging is driven by vision plan adjudication delays, Medicare Advantage prior authorization holds, or patient balance collection — each requiring a different intervention. Without this visibility, the Days in AR Benchmarks remain aspirational rather than operational.

Stop Missing Your Days in AR Benchmarks. Start Recovering the Revenue Difference.

MBC’s Optometry Center of Excellence deploys Chief Complaint protocols, NCCI-aware claim scrubbing, and real-time ICD-10 updates that move multi-provider eye care groups from 40+ Days in AR down to under 28 — recovering an average $120,000 annually for $2M practices.

Request Your 90-Day Optometry Revenue Cycle Audit

Identify your exact Days in AR gap and what’s causing it — before you sign anything.

FAQs:

Q1. What is the Days in AR benchmark for optometry practices?

High-performing optometry practices maintain Days in AR under 28 days. The national average across eye care sits at 35–40 days; anything above 40 signals systemic denial or follow-up failure requiring immediate intervention. For a $2M practice, the gap between 28 days and 40 days represents over $65,000 in delayed working capital at any given point.

Q2. How does vision-versus-medical plan misclassification raise Days in AR?

When encounters are defaulted to vision plans at lower reimbursement rates, claims settle quickly at the wrong amount — temporarily masking the true Days in AR problem. Meanwhile, legitimate medical claims are never submitted, suppressing Net Collection Ratio. The combined effect is a practice that appears to be meeting Days in AR Benchmarks while silently losing $200,000+ annually in uncollected medical insurance revenue.

Q3. How do the FY 2026 ICD-10-CM changes affect Days in AR?

The 17 new eye and adnexa codes released October 1, 2025 (CMS ICD-10-CM Guidelines) mean claims submitted with legacy codes for Demodex blepharitis, neovascular glaucoma, or thyroid eye disease after that date receive automatic rejections. Each rejection adds 21–45 days to AR aging per claim before resolution, directly pushing Days in AR above the 35-day average benchmark.

Q4. What Days in AR benchmark should a multi-provider eye care group target?

Multi-provider eye care groups running $2M+ in annual allowable charges should target Days in AR under 28 days with less than 15% of total AR in the 90+ day aging bucket. Practices with specialized optometry billing services consistently outperform these benchmarks because claim scrubbing, NCCI edit monitoring, and real-time ICD-10 updates operate as infrastructure — not exception processes.

Q5. How quickly can Days in AR improve after switching to specialized billing?

Eye care groups that transition to specialty-credentialed optometry billing services typically see measurable Days in AR improvement within 60–90 days — driven by pre-submission claim scrubbing, Chief Complaint protocol deployment, and denial root-cause analysis. The largest early gains come from eliminating NCCI bundling denials and correcting plan misclassification at intake.

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