Clean Claim Rate in Home Health: Benchmarks and Fixes

The calendar year (CY) 2026 Home Health Prospective Payment System Final Rule estimates an aggregate 1.3% decrease in Medicare payments to home health agencies (HHAs) compared with CY 2025. Against that lower baseline, two Medicare rules turn routine errors into costly delays: a claim without a matching Outcome and Assessment Information Set (OASIS) assessment returns to the provider, and each day of a late Notice of Admission (NOA) reduces payment by one thirtieth of the period payment.

Clean claim rate shows how often claims avoid those stalls. This guide defines clean claim rate in home health, explains why published benchmarks differ, shows where home health claims fail, and sets out how to improve the rate.

For the broader revenue cycle management (RCM) framework, agencies should review the Home Health RCM: The Operational Guide for Agency Leaders. For the claim-level checks that prevent returns, refer to the Pre-Billing Review Checklist.

Key Takeaways

• The Healthcare Financial Management Association (HFMA) defines clean claim rate as claims that pass edits with no manual intervention, divided by claims accepted into the claims processing tool. The rate is measured before the claim reaches the payer.
• Sources define the metric differently. A scrubber pass rate, a rate of claims paid without rejection or denial, and the Medicare clean claim definition measure different events and cannot be compared.
• The only home health benchmark verified for this guide is a 2019 figure of 95.61% for Medicare claims paid without rejection, denial, or Return to Provider (RTP). It predates the Patient-Driven Groupings Model (PDGM) and rests on one clearinghouse's data.
• A claim with no matching OASIS assessment returns to the provider with reason code 37253. The match uses three fields: the CMS Certification Number, the Beneficiary Medicare Number, and the assessment completion date.
• A late NOA reduces payment by one thirtieth of the period payment for each day from admission to NOA submission. Medicare also makes no Low Utilization Payment Adjustment (LUPA) per-visit payments for visits before the NOA is submitted.
• Agencies improve clean claim rate by fixing causes, not individual claims. Each rejection or return should be tracked by category and payer, and checks should run before submission.

What Clean Claim Rate Measures in Home Health

The HFMA Definition

HFMA publishes the revenue cycle indicators known as HFMA MAP Keys. The clean claim rate key, CL-1, divides claims that pass edits with no manual intervention by claims accepted into the claims processing tool for billing.

The count comes from the claims processing tool, which is usually the claim scrubber. It includes primary, secondary, and tertiary electronic claims. It excludes print and mail claims and claims that never enter the tool.

HFMA states that the key shows the quality of data collected and reported. It does not show whether the payer paid the claim. A claim can pass every edit and still be denied later.

A simple example shows the arithmetic. An agency sends 200 claims into its scrubber in a month, and 180 pass without manual intervention. The clean claim rate is 180 divided by 200, which equals 90%. The 20 claims held by edits are the ones that need review.

The Medicare Definition

Medicare law uses the term for payment timing. A clean claim has no defect or impropriety, including a lack of required substantiating documentation. It also has no circumstance requiring special treatment that prevents timely payment (42 U.S.C. 1395h).

The status matters because it starts the payment clock. Medicare holds a clean electronic claim for a 13-day waiting period, so payment cannot issue before day 14. Medicare owes interest on a clean claim that is not paid within 30 days.

Three Measures, Three Meanings

The table compares three measures that agencies and sources often call by the same name.

Agencies should name the definition in every report. A scrubber pass rate of 95% and a paid-without-stall rate of 95% describe different claims.

Clean Claim Rate Benchmarks for Home Health

What Published Sources Provide

The sources reviewed for this guide include no CMS or Office of the Inspector General (OIG) clean claim rate benchmark for home health agencies. HFMA reports MAP Key values through its MAP App benchmarking tool for subscribers. Agencies cannot read those values from the public key definitions.

Benchmark figures also appear in vendor blogs and webinar slides. Those figures often omit the definition, the sample, and the date. This guide does not use them.

The 2019 Home Health Data Point

A June 2019 Benchmark of the Month report from the National Alliance for Care at Home, formerly NAHC, used Corridor clearinghouse data. It reported that 95.61% of Medicare claims were paid without rejection, denial, or RTP. It reported 99.3% for non-Medicare claims paid without clearinghouse or payer rejections or denials.

The same report put the average time to adjudication at 12.09 days for Medicare-paid claims and 20 days for non-Medicare claims.

The two rates in the report use different denominators. The Medicare rate divides by adjudicated claims, and the non-Medicare rate divides by submitted claims. They are not directly comparable, even within the same report.

Three limits apply. The data predates PDGM, which applies to claims with From dates on or after January 1, 2020. It comes from one clearinghouse. It measures claims paid without a stall, not scrubber passes.

How Agencies Should Set an Internal Benchmark

Agencies should set the benchmark from their own data. First, choose one definition and apply it to every report. Second, calculate the rate by payer, because the 2019 report separated Medicare from non-Medicare claims. Third, track the rate by claim type, such as the NOA and the final claim.

The trend matters more than any outside number. A sudden drop signals a change upstream, such as an electronic health record (EHR) configuration change or a new OASIS version.

Escalation Level: Monthly: Agency leaders should compare clean claim rate by payer and claim type against the prior three months and record the definition used in each report.

Red Road Insight: A benchmark without a definition cannot guide a decision. An agency that compares its scrubber pass rate with a paid-without-stall figure will conclude that its performance is better or worse than it is. Every comparison should use the same numerator, denominator, and measurement point.

Clean Claim Rate in RCM: Why It Drives Cash Flow

In revenue cycle management, clean claim rate sits between documentation and payment. Clinical documentation, OASIS completion, coding, and billing all feed the claim. A defect in any of them can stop the claim at the scrubber, at the Medicare edit, or at adjudication.

Each stop adds days. A claim returned to the provider needs correction and resubmission before it can reach the payment floor. That rework uses staff time and adds no payment.

Clean claim rate does not replace denial rate. HFMA's remittance denial rate counts denials on the remittance advice, after adjudication. Agencies should read the two measures together.

A clean claim can still be denied. The Medical Necessity Documentation guide explains why a correctly coded claim can fail review when the record does not support the service.

What Clean Claim Rate Cannot Show

Clean claim rate tests whether a claim meets the structural requirements of the claims processing system. It does not test whether the claim carries the correct payment group. A claim can pass every edit with a clinical group or functional level that the record does not support.

That claim pays at the wrong rate without any rejection or return. A high clean claim rate therefore does not prove payment accuracy. Agencies should pair the rate with coding and OASIS review.

The rate also does not show how long a claim waited before submission. HFMA tracks that wait separately in its days in final billed not submitted key. An agency can hold a claim for weeks, submit it clean, and report a strong rate.

Where Home Health Claims Fail the Clean Standard

Home health claims fail in a small number of predictable places. Each failure sits at a handoff between clinical documentation, intake, and billing.

OASIS and Claim Matching

For claims with From dates on or after January 1, 2020, Medicare checks the final claim against an OASIS assessment. When the system finds no match, it returns the claim to the provider with reason code 37253 (CMS MLN SE20010).

The match uses three fields. They are the CMS Certification Number (OASIS item M0010), the Beneficiary Medicare Number (item M0063), and the assessment completion date (item M0090). The claim reports the completion date with occurrence code 50.

Agencies should confirm the assessment before billing. The OASIS Final Validation Report shows when CMS accepted the assessment. If the agency submitted the OASIS after the claim, the claim needs resubmission. An inactivated assessment needs resubmission.

OASIS version changes add a second source of error. The OASIS-E2 vs. OASIS-E1 guide covers the April 1, 2026 changes and the EHR checks they require.

Escalation Level: Immediate: Billers must confirm that the OASIS Final Validation Report shows an accepted assessment. They must also confirm that the three match fields agree with the claim before submission.

Notice of Admission Timing

Agencies must submit the NOA within 5 calendar days of the start of care. A late NOA reduces payment for the period. The reduction equals the days from the admission date to the NOA submission date, divided by 30, applied to the period payment including any outlier payment, per CMS manual instructions.

An example shows the effect. An agency submits an NOA 8 days after the admission date. The reduction is 8 divided by 30, which is about 27% of the period payment. The agency cannot bill that amount to the beneficiary.

Medicare also makes no LUPA per-visit payments for visits that occurred before the agency submitted the NOA. The final claim must match the NOA, because Medicare uses the NOA to apply the correct receipt date.

A late NOA is a workflow failure, not a clinical one. Intake, scheduling, and billing each hold part of the information. A missing handoff delays the submission.

Escalation Level: Immediate: Any NOA approaching the 5-day deadline without confirmation of submission should be escalated the same day.

Claim Fields and Sequencing

The NOA and the period claim use different claim types. The NOA uses Type of Bill 032A, and the period claim uses Type of Bill 0329. Billers must build each claim on the correct type.

A claim scrubber checks the claim as a document. Agencies should confirm that the scrubber also checks OASIS acceptance and NOA timeliness. The Pre-Billing Review Checklist lists the field-level checks for home health claims.

Escalation Level: Monthly: Agencies should review RTP and rejection reasons by category each month and map each category to the handoff that produced it.

Red Road Insight: RTP and rejection failures appear after the claim leaves the agency, but the cause sits at intake, clinical documentation, or billing set-up. A rejection rate reported as one number hides which handoff failed. Reporting by cause shows where the process needs to change.

How to Improve Clean Claim Rate

Agencies improve clean claim rate by removing the causes of failure, not by correcting claims one at a time. The steps below follow the order in which a claim moves through the agency.

Step 1: Fix the Definition and the Baseline

Agencies should choose the HFMA definition or document the alternative they use. They should calculate a baseline for the last three months by payer and claim type.

Step 2: Add Checks Before Submission

Agencies should place checks at three levels. The claim scrubber checks field construction and edits. A billing check confirms OASIS acceptance and the three match fields. An intake check confirms the NOA countdown and the Beneficiary Medicare Number.

Each level catches a different failure. The scrubber cannot see an OASIS assessment that CMS has not accepted. The intake check cannot confirm a completion date that the clinician has not yet entered. The checks work only together.

Step 3: Categorize Every Rejection and Return

Each rejected or returned claim should receive a cause code tied to a handoff. Useful categories include OASIS matching, NOA timing, claim construction, and beneficiary identifier. An agency can add categories, but each one must name a handoff.

Agencies should also track claims held by scrubber edits. HFMA's days in final billed not submitted key (PB-2) expresses the dollars held by edits as days of revenue.

Step 4: Return Findings to the Source

Corrective action should go to the handoff that produced the error. A pattern across many claims points to a system setting, such as an EHR configuration. A pattern tied to one biller or clinician points to training.

Step 5: Review on a Cadence

The table sets a review cadence that catches deviation while it is still correctable.

Escalation Level: Immediate: Billers must correct any claim that fails the OASIS match check or the NOA check before submission. A returned claim cannot reach payment until the agency corrects and resubmits it.

Escalation Level: Monthly: Agency leaders should review clean claim rate, remittance denial rate, and days in final billed not submitted together. A shift in one often explains a shift in another.

Red Road Insight: Clean claim rate improves when one person owns each failure category. A returned claim that belongs to intake, clinical documentation, and billing at once is corrected by none of them. A named owner for each category turns the rate from a report into a process control.

How External Revenue Cycle Review Supports Clean Claims

For agencies with high claim volume, running every pre-submission check on every claim is a capacity challenge. OASIS matching, NOA timing, and claim field review each need a person who confirms the result.

An external review function operating before submission checks each claim against the match fields and the NOA record. It categorizes every rejection and return by cause. It reports the rate by payer and claim type.

The external function does not replace internal ownership. The agency still owns intake and clinical documentation, so findings must return to those owners.

The Bottom Line

Clean claim rate measures claim quality before payment, and its value depends on its definition. Agencies that name the definition, report by payer and claim type, and place checks before submission can see which handoffs fail.

Medicare rules make two failures costly: no OASIS match and a late NOA. Both are preventable with checks at intake and billing. Against a baseline that CMS estimates fell by 1.3% in CY 2026, preventing those stalls protects cash flow the agency has already earned.

How Red Road Supports Clean Claim Performance

Agencies that manage claims across intake, clinical documentation, and billing often need a review layer that connects the handoffs. Red Road provides revenue cycle management support for home health agencies, with coding and OASIS review integrated into the claim workflow.

Red Road reports rejections and returns by cause, so agencies see whether a failure came from OASIS matching, NOA timing, or claim construction. This support operates as an extension of the agency team.

Explore how Red Road's revenue cycle management services support clean claim performance.

Regulatory Sources

• HFMA MAP Keys: Clean Claim Rate (CL-1), Remittance Denial Rate (AR-5), and Days in Final Billed Not Submitted to Payer (PB-2)
• National Alliance for Care at Home (formerly NAHC): Home Health Benchmark of the Month, June 2019
• CMS MLN Matters SE20010: Ensure Required Patient Assessment Information Is Reported for Home Health Claims
• CMS Transmittal 10839: Replacing Home Health Requests for Anticipated Payment with a Notice of Admission, Manual Instructions
• CMS Medicare Claims Processing Manual, Chapter 1, Section 80.2: Payment Floor and Payment Ceiling for Clean Claims
• Medicare statute, 42 U.S.C. 1395h: Prompt Payment of Clean Claims
• CMS-1828-F: CY 2026 Home Health Prospective Payment System Final Rule