Pre-Billing Review Checklist: Reduce Claim Denials

A pre-billing review checklist is a structured set of claim-level and documentation checkpoints completed before a home health or hospice claim is submitted to Medicare, designed to catch the specific errors that generate a Return to Provider (RTP), a claim rejection, or a downstream denial. Under the Centers for Medicare and Medicaid Services (CMS) Medicare Claims Processing Manual, Chapter 10, a home health claim missing occurrence code 50, the Outcome and Assessment Information Set (OASIS) assessment completion date, is returned to the provider automatically. A hospice claim submitted without a timely Notice of Election is provider-liable for every day of non-covered care before the election is accepted (CMS Medicare Claims Processing Manual, Chapter 10). These are mechanical, rule-based checks that a pre-billing process can catch before the claim ever reaches a payer, not judgment calls a reviewer makes after the fact.

A pre-billing review checklist is distinct from clinical documentation improvement (CDI) review, which asks whether the narrative record independently establishes medical necessity. Pre-billing review asks a narrower, more mechanical question: does this specific claim meet the structural and procedural requirements Medicare's claims processing systems check before they will accept it at all. Both functions matter, and a complete pre-submission process runs both, but they are answering different questions and this guide focuses specifically on the claim-level checklist.

This guide provides the specific, itemized checkpoints for home health claims, hospice claims, and the claim-level fields most frequently responsible for a Return to Provider, drawn directly from CMS claims processing manuals and federal regulation.

For the clinical documentation and medical necessity discipline that complements this checklist, refer to the Medical Necessity Documentation guide. For the broader revenue cycle framework, refer to the Home Health RCM Operational Guide. For the compliance and audit context this checklist protects against, refer to the Home Health Medicare Audit Defense and Compliance Guide.

Key Takeaways

• A home health claim missing occurrence code 50, the OASIS assessment completion date (M0090), is automatically returned to the provider. The claim also requires an exact match on CMS Certification Number, Beneficiary Medicare Number, and assessment completion date to the corresponding OASIS record.
• Home health claims use Type of Bill 0329, with the fourth digit indicating sequence: 7 for a replacement claim, 8 for a void or cancellation, 9 for the final original claim for the period.
• Patient Discharge Status code 06 must be reported whenever an agency knows a period will receive a partial period payment adjustment, due to a transfer or a discharge-and-readmission within the same 30-day period. Reporting this incorrectly, or failing to report it when required, produces a payment error.
• Occurrence codes 61 and 62 report an inpatient hospital or other institutional discharge that occurred within 14 days prior to the home health admission date, directly affecting the institutional versus community admission source variable in PDGM (Patient-Driven Groupings Model) grouping.
• Hospice claims require a timely Notice of Election (NOE) filed within 5 calendar days of the election effective date. Days of hospice care before a late NOE is accepted are non-covered and provider-liable, a stricter consequence than the proportional home health NOA reduction.
• The hospice election statement addendum, required content under 42 CFR 418.24, must list the patient's conditions present on admission and the items, services, and drugs the hospice has determined are unrelated to the terminal illness. Missing or improperly timed addendum delivery is a condition for payment, not a documentation nicety.

Why Pre-Billing Review Is a Distinct Checkpoint

Pre-billing review and clinical documentation review answer different questions, and treating them as the same checklist creates gaps in both. Clinical documentation review asks whether the narrative record, independent of any code, establishes medical necessity. Pre-billing review asks whether the claim, as a structured transaction, meets the specific field-level, sequencing, and matching requirements Medicare's claims processing systems enforce mechanically.

A claim can pass clinical documentation review completely, the medical necessity case is well established, and still fail pre-billing review because occurrence code 50 is missing, the OASIS completion date does not match the claim, or the Type of Bill sequence digit is incorrect. These are procedural failures that a dedicated pre-billing checklist is specifically designed to catch, not clinical failures, because a reviewer evaluating medical necessity is not typically checking claim form field construction.

Red Road Insight: The pattern we see most often is an agency with strong clinical documentation and a rising RTP rate that clinical staff cannot explain, because the errors are claim construction errors, not clinical ones: a mismatched OASIS date, a missing occurrence code, an incorrect patient status code. These require a checklist built around the claim form itself, not a chart review.

Home Health Pre-Billing Checklist

The following checkpoints are drawn from the specific field requirements and matching rules CMS applies to home health claims under the Medicare Claims Processing Manual, Chapter 10.

OASIS and Claim Matching

• Occurrence code 50 is present on the claim, reporting the OASIS assessment completion date (M0090) for the period being billed.
• The CMS Certification Number (CCN), Beneficiary Medicare Number, and assessment completion date on the claim match exactly to the corresponding OASIS record. A mismatch on any of these three fields causes the claim to be returned.
• The OASIS assessment has completed processing and been accepted into the CMS quality system before the claim is submitted. This can be confirmed by reviewing the OASIS Final Validation Report (FVR) completion date and time before billing.
• The Reason for Assessment (RFA, OASIS item M0100) on the matched assessment is a payment-relevant reason code (01, 03, 04, or 05). A claim matched to an assessment with a non-payment RFA will not process correctly.

Type of Bill and Sequencing

• The Notice of Admission (NOA) was submitted using Type of Bill 032A before any claim for the admission period was submitted. Claims submitted before an accepted NOA will be returned to the provider.
• The claim itself uses Type of Bill 0329 (fourth digit 9), the correct code for a final original home health claim for the period.
• Adjustments to a previously submitted and paid claim use Type of Bill 0327 (fourth digit 7). Cancellations use Type of Bill 0328 (fourth digit 8). Using the wrong sequence digit for a correction produces processing errors.
• The NOA's Statement Covers Period From and Through dates match exactly, since CMS requires these to be identical on the NOA.
• Condition code 47 is reported on the NOA when the admission period is already open at another agency due to a transfer, so the receiving agency's NOA is not rejected as a duplicate primary claim.

Patient Status and Discharge Coding

• Patient Discharge Status code 06 is reported whenever the agency knows, at the time of billing, that the period will receive a partial period payment adjustment due to a transfer to another agency or a discharge-and-readmission within the same 30-day period.
• Patient status code 06 is not used in cases where the beneficiary is transferring to Medicare Advantage or has died, since incorrect use of this code in those circumstances produces an inaccurate payment adjustment or an incorrect date-of-death record in Medicare systems.
• When an agency provides care in one 30-day period and then discharges the beneficiary in a subsequent period with no billable visits in that later period, patient status code 01 is reported on the claim for the last period in which visits actually occurred, to properly close the admission period in CMS systems.

Admission Source and Timing

• Occurrence code 61 (hospital discharge date) or 62 (other institutional discharge date, covering skilled nursing, inpatient rehabilitation, long-term care hospital, or inpatient psychiatric facility stays) is reported when an inpatient stay ended within 14 days prior to the home health admission date, which directly affects the institutional versus community admission source variable used in PDGM clinical grouping.
• Only one occurrence code, 61 or 62, is reported per claim. If more than one qualifying discharge occurred in the 14-day window, only the most recent discharge date is reported. Claims reporting more than one such occurrence code will be returned for correction.
• For continuing periods of care within the same admission, occurrence code 61 is used to report a qualifying inpatient hospital admission during the period, following the same rules.

LUPA and Outlier Criteria

• For a period expected to receive a Low Utilization Payment Adjustment (LUPA) add-on payment, the claim's Admission Date matches the claim's From Date exactly, since this match is one of the criteria CMS uses to determine LUPA add-on eligibility.
• A LUPA claim includes at least one qualifying skilled visit (skilled nursing, physical therapy, occupational therapy, or speech-language pathology). Claims meeting LUPA add-on criteria without a qualifying skilled service will be returned.
• Nonroutine supplies are not billed as separate line items on a LUPA claim, since these are not reimbursed in addition to per-visit LUPA payments.

Escalation Level: Immediate : Any claim failing the OASIS-to-claim matching check (CCN, Beneficiary Medicare Number, or assessment completion date mismatch) should be corrected before submission rather than allowed to generate a Return to Provider, since RTP claims require reprocessing time that a pre-submission check avoids entirely.

Hospice Pre-Billing Checklist

Hospice claims carry pre-billing requirements distinct from home health, centered on the Notice of Election, the election statement and its addendum, and the physician certification of terminal illness (42 CFR Section 418.24).

Notice of Election Timeliness

• The Notice of Election (NOE) was filed with the Medicare contractor within 5 calendar days after the effective date of the election statement. Unlike the home health NOA's proportional payment reduction for late filing, a late hospice NOE results in complete non-coverage, provider-liable, for every day from the hospice admission date to the date the NOE is submitted and accepted.
• The election statement effective date and the NOE filing date are confirmed to align with the 5-day window before the claim is submitted, since this is a hard payment condition, not a correctable formatting issue.

Election Statement Completeness

• The election statement includes the required content elements: the hospice agency name, an acknowledgment that the palliative rather than curative nature of hospice services has been explained to the patient, the effective date of election, and the individual's or representative's signature.
• If the election statement addendum, titled 'Patient Notification of Hospice Non-Covered Items, Services, and Drugs,' has been requested by the patient, representative, or a non-hospice provider, it was furnished within the required timeframe: within 5 days of the request if requested during the first 5 days of the hospice election, or within 3 days of the request if requested later in the course of care.
• The addendum, when required, includes the patient's conditions present on hospice admission or at the most recent plan of care update, along with the associated items, services, and drugs the hospice has determined are unrelated to the terminal illness.
• If the addendum was not signed by the patient or representative, the hospice has documented the specific reason on the addendum itself, since an unsigned addendum without a documented reason does not meet the condition for payment.

Certification and Level of Care

• The Certification of Terminal Illness (CTI) for the applicable benefit period is signed and dated by the hospice physician and, for the initial 90-day period, the attending physician if one is identified, and includes the physician's clinical narrative supporting the six-month prognosis, not only the signed certification statement.
• The level of care billed, Routine Home Care, Continuous Home Care, General Inpatient Care, or Respite Care, is supported by documentation specific to that level's coverage criteria, and any level-of-care changes during the billing period are reflected accurately on the claim.

Red Road Insight: The hospice NOE penalty is more severe than the home health NOA penalty in a way agencies sometimes underweight until it produces a full-period non-payment. A home health NOA delay costs a proportional share of the payment. A hospice NOE delay costs full non-coverage for every day before acceptance, which makes NOE timeliness tracking a higher-priority daily checkpoint for hospice than the equivalent home health check.

Escalation Level: Immediate : Any hospice election approaching the 5-day NOE filing window without confirmed submission should be escalated same-day. Unlike several other pre-billing checks, there is no partial correction available once the window has passed; the non-covered days are fixed by the actual NOE acceptance date.

Claim-Level Fields Most Frequently Responsible for Rejection

Building the Pre-Billing Review Workflow

An effective pre-billing review operates as a checkpoint immediately before submission, not as a periodic audit of already-submitted claims. Each claim should pass through the relevant checklist, home health or hospice, before it leaves the billing queue.

Review Cadence

Tracking RTP and rejection reasons by the specific field or checklist item responsible, rather than as an undifferentiated rejection rate, reveals whether the same error is recurring across multiple claims, which typically points to an EHR configuration gap or a training gap for a specific biller, rather than isolated one-off mistakes.

Red Road Insight: An undifferentiated rejection rate tells an agency that something is wrong. A rejection rate broken out by specific checklist category tells an agency what to fix. The second version is the one that actually changes the following month's numbers.

Escalation Level: Monthly : Agencies should review RTP and rejection patterns monthly against the specific checklist categories in this guide, home health OASIS matching, TOB sequencing, admission source coding, or hospice NOE and election statement timeliness, to identify which category is generating the most volume and target correction there first.

How External Pre-Billing Review Support Addresses This Gap

For agencies managing high claim volume, running the complete home health or hospice checklist against every claim before submission is a consistency challenge more than a knowledge challenge. An external pre-billing review function applies the checklist systematically to every claim, confirming OASIS-to-claim matching, correct Type of Bill sequencing, accurate occurrence and condition codes, and hospice NOE and election statement timeliness before the claim reaches the payer, catching the mechanical errors that generate RTPs and rejections independent of whether the underlying clinical documentation is sound.

The Bottom Line

A pre-billing review checklist catches a category of claim failure that clinical documentation review is not built to catch: mechanical, field-level, and sequencing requirements that Medicare's claims processing systems enforce automatically, independent of whether the underlying medical necessity case is sound. Occurrence code 50 matching, Type of Bill sequencing, admission source coding, and hospice NOE timeliness are checkable, correctable items, not clinical judgment calls, and a claim that fails on one of them never reaches the point where its clinical merits are even evaluated.

Agencies that run a structured pre-billing checklist as a standing part of every claim submission, distinct from and in addition to clinical documentation review, close a specific and preventable source of RTPs, rejections, and delayed payment that has nothing to do with the quality of care delivered.

How Red Road Supports Pre-Billing Review

Red Road's clinical documentation review service applies a structured pre-billing checklist to every home health and hospice claim before submission, validating OASIS-to-claim matching, Type of Bill sequencing, occurrence and condition code accuracy, and NOA or NOE timeliness against current CMS claims processing requirements. This runs alongside clinical documentation review itself, so both the procedural and clinical dimensions of claim accuracy are addressed before the claim leaves the queue.

RTP and rejection reasons are tracked and reported monthly by specific category, allowing agencies to see clearly whether rejection volume concentrates in OASIS matching, claim field construction, or timeliness, and to direct correction to the source rather than treating every rejection as the same problem.

Explore how Red Road's clinical documentation review services support pre-billing accuracy and denial prevention.

Regulatory Sources

• CMS Medicare Claims Processing Manual, Chapter 10 — Home Health Claims Processing and OASIS Matching Requirements
• 42 CFR § 418.24 — Hospice Election Statement, Addendum, and Notice of Election Requirements