A Step-by-Step Guide to UB-04 Forms and EDI 837I in Skilled Nursing Facility Billing

Skilled nursing facilities use institutional claims to report covered services. For Medicare, the electronic ASC X12 837I is the usual submission format; the CMS-1450 paper claim—commonly called UB-04—is permitted only in qualifying exception or waiver situations. An SNF billing workflow must translate the clinical, assessment and census record into the payer’s current claim requirements without inventing missing facts.

UB-04 vs. EDI 837I for SNF Billing

The National Uniform Billing Committee maintains the UB-04 data set, while X12 publishes the 837I implementation guide. Use licensed, current specifications and the payer’s companion guide rather than copying fields from an old claim.

SNF Institutional Claim Workflow

1. Confirm eligibility and benefit status. Verify Medicare or payer coverage, coordination of benefits, benefit-period information and any managed-care authorization requirements.
2. Reconcile the resident record. Match admission, discharge, transfer, leave-of-absence and covered/noncovered dates with the census and clinical record.
3. Validate assessment inputs. Confirm that the relevant Minimum Data Set information and HIPPS output are available from the qualified facility process.
4. Build claim data. Populate the applicable bill type, statement dates, patient status, revenue lines, units, value/condition/occurrence information and provider identifiers.
5. Review diagnosis reporting. Make sure diagnoses and sequencing are supported by the record and current coding guidance. Route clinical or coding questions to qualified owners.
6. Apply payer-specific edits. Check the current Medicare Administrative Contractor or health-plan companion guide, not only the clearinghouse edit set.
7. Submit and read acknowledgments. Monitor transaction acknowledgments, claim-status responses, rejections, returns and denials as distinct queues.
8. Reconcile payment and AR. Post remittance, work underpayments and denials, and retain the audit trail.

High-Risk SNF Claim Data to Review

The required fields vary by claim type and payer. Common review points include:

• Statement-from and statement-through dates
• Type of bill and patient discharge status
• Covered, noncovered, coinsurance and lifetime-reserve days when applicable
• Revenue code 0022 and the HIPPS rate code for applicable Medicare Part A SNF PPS claims
• Diagnosis information supported by the medical record
• Attending, operating or other provider information when required
• Prior payer payments and coordination-of-benefits data
• Occurrence, occurrence-span, condition and value codes applicable to the billing situation

This is a control list, not a universal field recipe. Claims involving benefit exhaustion, no-payment situations, interrupted stays, leave days, Medicare Advantage or secondary coverage need the current payer-specific instructions.

Eligibility and Authorization Are Separate Controls

Active coverage does not confirm that a service is authorized or payable. For Medicare Advantage and commercial plans, track the authorization request, approved level and dates of care, units or days, facility, reference number and unresolved exceptions. ICS’s prior authorization support can manage the administrative queue while the SNF supplies clinical records and retains clinical decisions.

Do Not Treat Clearinghouse Acceptance as Payment Approval

An accepted 837I transaction may still deny for coverage, benefit, authorization, coding, medical-necessity or documentation reasons. Separate these stages in reporting:

• Transaction rejection: the electronic file or transaction failed an early validation.
• Claim rejection or return: the payer could not adjudicate the claim as submitted.
• Denial: the payer adjudicated but did not allow all or part of the claim.
• Underpayment: the claim paid, but the facility believes the amount conflicts with the contract or applicable payment rules.

Use a root-cause-based denials management process instead of repeatedly resubmitting an unchanged claim.

What an Offshore SNF Billing Team Can Handle

Dedicated FTE or Percentage-Based Support?

A dedicated offshore FTE team can suit facilities that want named resources and direct queue control. A percentage-based billing model may suit organizations that prefer fees tied to collections, provided the contract defines included payers, old AR, minimums, exclusions, refunds and posting responsibilities.

Current CMS Sources for SNF Billers

Use the current CMS Skilled Nursing Facility Billing Reference and the CMS education on CMS-1450 and 837I institutional billing. CMS also explains the limited paper-claim waivers and exceptions. This guide is operational information, not legal, clinical or coding advice.

Discuss Your SNF Billing Workflow

ICS’s skilled nursing facility billing services page is the commercial owner for this specialty. To compare your institutional-claim workflow, responsibilities and engagement options, contact ICS.

Provider groups needing support with institutional claim connectivity can explore ICS clearinghouse and EDI management.

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