SNF Consolidated Billing Audits: Preventing Overpayments to Outside Providers and Suppliers

When a Medicare beneficiary is in a covered Part A skilled nursing facility (SNF) stay, the SNF is generally responsible for nearly all of the beneficiary's services, even those furnished by outside providers and suppliers. This rule, called consolidated billing, means the SNF's per diem payment covers services such as most laboratory tests, imaging, therapy, drugs, supplies, and many outpatient hospital services. Outside providers that furnish these services must look to the SNF, not Medicare, for payment.

When outside providers bill Medicare directly for services subject to consolidated billing, Medicare may pay twice: once in the SNF per diem and again to the outside provider. Contractors use claims edits and data analysis to identify these overpayments, and recoveries can affect outside providers, suppliers, and SNFs. Consolidated billing also creates relationships between SNFs and outside providers that must be managed carefully.

This article explains consolidated billing, the services that are excluded, Part B consolidated billing for therapy, arrangements with outside providers, common overpayment scenarios, and how SNFs and outside providers can audit and prevent errors. It is educational and does not replace legal or professional advice.

The Legal Basis

Section 1888(e)(2)(A) of the Social Security Act requires SNFs to bill Medicare for services furnished to residents during a covered Part A stay, with specified exclusions. CMS implements the requirement through regulations, including 42 CFR 411.15(p), which excludes from Medicare coverage services subject to consolidated billing when furnished by an entity other than the SNF, unless under arrangements, and 42 CFR 489.20(s), which requires SNFs to agree to bill for these services. Chapter 6 of the Medicare Claims Processing Manual provides detailed instructions, and CMS publishes annual consolidated billing files listing excluded codes.

How Consolidated Billing Works

Part A Consolidated Billing

During a covered Part A SNF stay, the SNF must furnish or arrange for virtually all services the resident needs, except those specifically excluded. Outside providers that furnish included services must be paid by the SNF under arrangements. Medicare pays the SNF through its PDPM per diem.

Part B Consolidated Billing

Consolidated billing also applies to certain services for residents who are not in a covered Part A stay but reside in the Medicare-certified part of the facility. Under Part B consolidated billing, the SNF must bill for physical therapy, occupational therapy, and speech-language pathology services furnished to these residents.

Arrangements

Under arrangements, the outside provider furnishes the service and the SNF pays the outside provider. The arrangement should be documented in a written agreement that describes the services, payment terms, and responsibilities.

Services Excluded From Consolidated Billing

Some services are excluded and may be billed separately by the provider who furnishes them. CMS groups exclusions into categories, and the details are in the annual consolidated billing files and the Medicare Claims Processing Manual. Common exclusions include:

Professional Services

• Physician professional services.

• Services of certain practitioners, such as nurse practitioners, clinical nurse specialists, physician assistants, certified nurse-midwives, qualified psychologists, and certified registered nurse anesthetists.

• The professional component of diagnostic services.

Certain High-Cost or Intensive Services

• Certain chemotherapy drugs and their administration.

• Certain radioisotope services.

• Certain customized prosthetic devices.

• Dialysis and certain ESRD-related services.

Certain Outpatient Hospital Services

• Emergency services.

• Certain cardiac catheterization, CT scans, MRI, ambulatory surgery requiring the use of an operating room, radiation therapy, angiography, and certain lymphatic and venous procedures, as specified by CMS.

Other Exclusions

• Hospice care related to the terminal illness.

• Certain ambulance services, such as transportation related to excluded services or dialysis, as specified by CMS.

• Certain telehealth services.

Exclusions are code-specific and change over time. SNFs and outside providers should use the current CMS consolidated billing files.

Common Services Subject to Consolidated Billing

Services generally included in consolidated billing during a covered Part A stay include:

• Most laboratory tests and the technical component of most diagnostic tests.

• Most imaging technical components, except excluded services.

• Physical therapy, occupational therapy, and speech-language pathology.

• Most drugs and biologicals, except excluded ones.

• Medical supplies.

• Durable medical equipment used in the facility.

• Many outpatient hospital services that are not excluded.

• Many ambulance services, such as transportation between facilities for services that are not excluded.

Common Overpayment Scenarios

Outside Laboratories and Imaging

A laboratory or imaging provider bills Medicare directly for a test performed for a resident in a covered Part A stay. The service is subject to consolidated billing, so the provider should have billed the SNF.

Outpatient Hospital Services

A resident goes to a hospital outpatient department for a service that is not excluded, and the hospital bills Medicare. The SNF is responsible for the service.

Therapy

An outside therapy provider bills Medicare Part B for therapy furnished to a resident in a Part A stay or a Part B stay in the certified part of the facility.

DME and Supplies

A supplier bills Medicare Part B for DME or supplies for a resident in a covered Part A stay. DME used in the facility is generally covered by the SNF payment.

Ambulance

An ambulance supplier bills Medicare for transportation that is subject to consolidated billing, such as a transfer for a non-excluded service.

Drugs

A pharmacy bills Medicare Part B or Part D for drugs that the SNF should have provided during a covered stay.

How Contractors Find Consolidated Billing Errors

• Common Working File edits that compare outside claims with SNF stay dates.

• Post-payment data analysis identifying claims during SNF stays.

• OIG audits of payments for services during SNF stays.

When contractors identify overpayments, they generally recover from the outside provider that billed Medicare. The outside provider may then seek payment from the SNF under the arrangement, which can create disputes.

Responsibilities of the SNF

• Furnish or arrange for all services subject to consolidated billing.

• Maintain written arrangements with outside providers.

• Pay outside providers for included services under arrangements.

• Communicate the resident's SNF status to outside providers.

• Bill Medicare correctly for the services.

• Train staff who order outside services on consolidated billing.

Responsibilities of Outside Providers

• Determine whether the patient is in a SNF and whether the service is subject to consolidated billing before billing Medicare.

• Bill the SNF for included services under arrangements.

• Bill Medicare only for excluded services, using correct codes.

• Respond to overpayment demands and coordinate with SNFs.

Communication Between SNFs and Outside Providers

Many consolidated billing errors start with poor communication. Strong practices include:

• Including SNF stay status and billing instructions with every order or referral to an outside provider.

• Using standard forms that tell the outside provider to bill the SNF.

• Informing ambulance suppliers, laboratories, imaging centers, and pharmacies of the resident's Part A status.

• Confirming with hospitals whether outpatient services are excluded.

• Notifying outside providers promptly when a resident's Part A stay begins or ends.

Written Arrangements

Written agreements with outside providers should address:

• Services covered.

• How the outside provider will verify SNF status.

• Billing procedures and payment rates.

• Documentation requirements.

• Handling of disputes and overpayment recoveries.

• Compliance with the Anti-Kickback Statute, including fair market value pricing.

Kickback Concerns

Arrangements must not include below-market pricing in exchange for referrals of other business. For example, an outside provider offering deeply discounted prices for Part A services in exchange for referrals of separately billable Part B business may raise Anti-Kickback Statute concerns.

Auditing Consolidated Billing

For SNFs

• Compare outside provider invoices with the services ordered for Part A residents.

• Review whether outside providers billed Medicare directly for included services, using available data and remittance information from partners.

• Review written arrangements for completeness.

• Train ordering staff on consolidated billing.

• Review the handling of Part B therapy for residents in the certified part of the facility.

For Outside Providers

• Review claims for patients with SNF addresses or SNF stay indicators.

• Verify eligibility and SNF status before billing.

• Check the CMS consolidated billing files for excluded codes.

• Audit a sample of claims for patients in SNFs.

• Correct and refund overpayments under the 60-day rule at 42 CFR 401.305.

Building a Prevention Program

At Admission

• Identify Part A residents and their stay dates.

• Notify contracted outside providers of the resident's status.

When Ordering Services

• Use order forms that indicate the resident's Part A status and billing instructions.

• Determine whether the service is excluded.

• Arrange services through contracted providers when possible.

During the Stay

• Track outside services provided.

• Reconcile invoices with orders.

At Discharge

• Notify outside providers when the Part A stay ends.

Ongoing

• Update staff training annually and when CMS updates exclusion files.

• Review arrangements annually.

• Audit regularly.

Hospice and Consolidated Billing

When a SNF resident elects hospice for a terminal condition, hospice care related to the terminal illness is excluded from SNF consolidated billing and is billed by the hospice. SNFs and hospices should coordinate carefully, especially for residents who receive a Medicare-covered SNF stay for an unrelated condition, which is uncommon and must be clearly documented.

A Hypothetical Example

An imaging company receives an overpayment demand for dozens of X-rays billed to Medicare for patients who were in covered Part A SNF stays. Its intake process had not checked SNF status. The company implements eligibility checks that identify SNF stays, updates its agreements with SNFs to require Part A status notices on every order, refunds the overpayments, and bills the SNFs for the services under its arrangements. The SNFs, in turn, update their order forms and train nurses to include Part A status and billing instructions.

Understanding the Exclusion Categories in More Detail

CMS organizes consolidated billing exclusions into broad groups, and understanding the logic helps staff apply the rules. Some services are excluded entirely, meaning they are excluded regardless of the setting where they are furnished. Physician professional services are the clearest example. Other services are excluded only when furnished in a particular setting, such as certain outpatient hospital services that are excluded only when furnished by a hospital. Still other exclusions apply to specific codes, such as certain chemotherapy drugs, radioisotopes, or customized prosthetics, which CMS lists in its annual files.

Professional and Technical Components

Many diagnostic tests have a professional component, such as a radiologist's interpretation, and a technical component, such as the equipment and staff used to perform the test. For residents in a covered Part A stay, the professional component is generally excluded and billed by the practitioner, while the technical component is generally included and is the SNF's responsibility unless the service falls within an excluded category. Confusion over this split is a common source of errors for imaging and laboratory providers.

Ambulance Services

Ambulance transportation creates frequent questions. Transportation to and from excluded services, such as certain outpatient hospital procedures or dialysis, may be excluded, while transportation for services that are included, such as a transfer to another provider for a non-excluded test, is generally the SNF's responsibility. Because the answer depends on the reason for the trip and the destination, the SNF's transportation orders should state the purpose of each trip.

Drugs

Most drugs furnished during a covered Part A stay are the SNF's responsibility, including drugs that would otherwise be covered by Part B or Part D. Pharmacies serving SNFs should know which residents are in Part A stays so they bill the SNF rather than a Part D plan or Medicare Part B. Certain chemotherapy drugs and other specified drugs are excluded and may be billed separately.

The Part A Stay Window

Consolidated billing for Part A services applies only during the covered Part A stay. That makes accurate admission and discharge dates essential. Services furnished on the day of admission or discharge can raise questions. Outside providers should verify dates, and SNFs should notify partners promptly when a resident's Part A coverage ends, for example when the resident no longer requires daily skilled services or exhausts benefit days. After Part A coverage ends, the resident may still be subject to Part B consolidated billing for therapy if residing in the Medicare-certified part of the facility.

Leave of Absence and Transfers

When a resident leaves the facility for a short period and returns, or is admitted to a hospital, consolidated billing rules depend on whether the resident was formally discharged and on the services furnished during the absence. Facilities should follow the Medicare Claims Processing Manual's instructions for these situations and document the circumstances.

Common Myths About Consolidated Billing

Myth: If the Outside Provider Billed Medicare, It Is the Outside Provider's Problem

Contractors generally recover from the provider that billed Medicare, but the dispute often returns to the SNF, which was responsible for the service. Repeated problems can damage relationships with partners and create compliance questions for both sides.

Myth: All Hospital Outpatient Services Are Excluded

Only specified outpatient hospital services are excluded. Many outpatient services, such as many laboratory tests and routine imaging, are included and are the SNF's responsibility.

Myth: Consolidated Billing Ends When Therapy Ends

Part A consolidated billing applies during the covered Part A stay. Part B consolidated billing for therapy continues for residents in the Medicare-certified part of the facility even after Part A coverage ends.

Myth: Discounts From Suppliers Are Always Acceptable

Discounts are not automatically improper, but arrangements involving below-fair-market pricing tied to referrals of other business can raise Anti-Kickback Statute concerns.

Questions Leadership Should Ask

• Do our order forms state each resident's Part A status and billing instructions?

• Do we have written arrangements with every outside provider that furnishes included services?

• Do our arrangements reflect fair market value pricing?

• How quickly do we notify partners when a resident's Part A stay begins or ends?

• Do we reconcile outside invoices with orders each month?

• Have any partners received overpayment demands for services to our residents?

• When did we last train ordering staff on consolidated billing?

• Do we use the current CMS consolidated billing files?

Key Takeaways

• The SNF is responsible for most services furnished to residents during a covered Part A stay.

• Exclusions are specific and change over time, so use current CMS files.

• Part B consolidated billing applies to therapy for residents in the Medicare-certified part of the facility.

• Clear communication of Part A status prevents most errors.

• Written arrangements should define responsibilities and comply with the Anti-Kickback Statute.

• Both SNFs and outside providers should audit and correct errors promptly.

Responding to an Overpayment Demand

When an outside provider receives an overpayment demand for services furnished during a SNF stay, it should first confirm the facts. Was the patient actually in a covered Part A stay on the date of service? Was the service included or excluded under the CMS files for that year? Was the patient in the Medicare-certified part of the facility for Part B therapy? Errors in eligibility data or stay dates sometimes cause incorrect demands, which can be appealed through the standard Medicare appeals process.

If the demand is correct, the outside provider should repay or arrange recoupment, then seek payment from the SNF under its arrangement. SNFs should respond promptly, confirm the service was ordered, and pay the agreed rate. Both parties should then identify the root cause, such as a missing Part A status notice, and correct the process so the error does not recur. Documenting these steps demonstrates an effective compliance program.

Training Priorities for Staff

Nurses, unit clerks, and admissions staff who order outside services are the first line of defense. Short, practical training that shows how to identify a resident's Part A status, which services are excluded, and how to complete order forms is often more effective than long policy reviews.

Frequently Asked Questions

What is SNF consolidated billing?

A requirement that the SNF bill Medicare for most services furnished to residents during a covered Part A stay, including services by outside providers under arrangements.

Which services are excluded?

Physician and certain practitioner professional services, certain high-cost services, certain outpatient hospital services, dialysis, hospice care related to the terminal illness, and other services listed in CMS's consolidated billing files.

Does consolidated billing apply to Part B stays?

Yes, for physical therapy, occupational therapy, and speech-language pathology furnished to residents in the Medicare-certified part of the facility.

Who repays overpayments for improperly billed outside services?

Contractors generally recover from the outside provider that billed Medicare. The outside provider may seek payment from the SNF under the arrangement.

How can SNFs prevent errors?

Communicate Part A status with every order, maintain written arrangements, train staff, and audit regularly.

Conclusion

Consolidated billing makes the SNF responsible for most services its Part A residents receive, and errors can result in duplicate payments and overpayment recoveries. SNFs and outside providers that understand the rules and exclusions, communicate clearly, maintain written arrangements, verify status before billing, and audit regularly can prevent overpayments and disputes.

How HealthBridge Can Help

HealthBridge is a healthcare management consulting firm that helps SNFs and outside providers prevent consolidated billing errors through arrangement reviews, order and communication process design, claim audits, staff training, and overpayment response support. If consolidated billing is a concern for your organization, please get in touch with us. We will be happy to help you with this topic.

References

• U.S. Social Security Administration. Social Security Act, Section 1888, Prospective Payment for Skilled Nursing Facilities. https://www.ssa.gov/OP_Home/ssact/title18/1888.htm

• Electronic Code of Federal Regulations. 42 CFR 411.15, Particular Services Excluded From Coverage. https://www.ecfr.gov/current/title-42/chapter-IV/subchapter-B/part-411/subpart-A/section-411.15

• Electronic Code of Federal Regulations. 42 CFR 489.20, Basic Commitments. https://www.ecfr.gov/current/title-42/chapter-IV/subchapter-G/part-489/subpart-B/section-489.20

• Electronic Code of Federal Regulations. 42 CFR 401.305, Requirements for Reporting and Returning of Overpayments. https://www.ecfr.gov/current/title-42/chapter-IV/subchapter-A/part-401/subpart-D/section-401.305

• Centers for Medicare & Medicaid Services. Skilled Nursing Facility (SNF) Consolidated Billing. https://www.cms.gov/medicare/billing/snfconsolidatedbilling

• Centers for Medicare & Medicaid Services. Medicare Claims Processing Manual, Chapter 6, SNF Inpatient Part A Billing and SNF Consolidated Billing. https://www.cms.gov/Regulations-and-Guidance/Guidance/Manuals/downloads/clm104c06.pdf

• Centers for Medicare & Medicaid Services. Medicare Benefit Policy Manual, Chapter 8, Coverage of Extended Care (SNF) Services Under Hospital Insurance. https://www.cms.gov/Regulations-and-Guidance/Guidance/Manuals/downloads/bp102c08.pdf

• Office of the Law Revision Counsel. 42 U.S.C. 1320a-7b, Criminal Penalties for Acts Involving Federal Health Care Programs. https://uscode.house.gov/view.xhtml?req=granuleid:USC-prelim-title42-section1320a-7b&num=0&edition=prelim

• U.S. Department of Health and Human Services, Office of Inspector General. Reports and Publications. https://oig.hhs.gov/reports/all/