A Step-by-Step Guide to the SNF Billing Process and Where Revenue Gets Lost at Each Stage
The SNF billing process is not a single event it is a sequence of interconnected steps that begins before the first day of care and continues through final payment and AR resolution. Every step carries compliance obligations and revenue risk. Miss one step, execute one incorrectly, or allow one to happen out of sequence, and the consequence shows up in denied claims, aged receivables, or permanent revenue loss. Understanding how the process works and specifically where revenue most commonly leaks at each stage is the starting point for building a billing operation that consistently captures the full reimbursement a facility has earned.
Step 1: Eligibility Verification
What Happens
Before the first claim is submitted, the billing team must verify the resident’s Medicare eligibility, confirm the qualifying three-day inpatient hospital stay that precedes the Medicare Part A SNF admission, identify all secondary payers, and determine the resident’s current benefit period status. Eligibility verification should happen at or before admission not after the resident has already been admitted and care has begun.
Where Revenue Gets Lost
Eligibility errors are among the most preventable and most damaging billing failures in the SNF setting. A resident admitted under the assumption of Medicare Part A eligibility who does not actually qualify generates a billing problem that affects every day of the stay. If the three-day qualifying hospital stay requirement is not confirmed before admission, the facility may deliver days of skilled care with no billable Medicare payer in place. Medicaid pending accounts that are not identified at intake age into private pay AR without a confirmed payer, creating write-off risk that compounds weekly.
What this means for your facility: Eligibility verification is a revenue-protection function, not an administrative formality. A structured admission-day workflow confirming Medicare eligibility, benefit period status, and secondary payers before care begins eliminates many eligibility-related denials before they occur.
Step 2: MDS Assessment and PDPM Coding
What Happens
The Minimum Data Set (MDS) assessment captures clinical information that drives PDPM reimbursement calculations. Under PDPM, each Medicare Part A resident’s daily rate is determined by a HIPPS code generated from MDS data across five case-mix components: Physical Therapy, Occupational Therapy, Speech-Language Pathology, Nursing, and Non-Therapy Ancillaries. The MDS must be completed within required timeframes the five-day PPS assessment must be completed for days one through eight of the Medicare Part A stay.
Where Revenue Gets Lost
The Nursing and NTA components are the most consistently under coded in the SNF setting because their payment drivers require nursing documentation discipline that differs significantly from what prior therapy-volume models required. Conditions like active infections, IV medications, depression, tracheostomy care, and pressure ulcer management all drive NTA payment, but only when they are documented specifically in the nursing notes and coded correctly in the MDS. An MDS that understates clinical complexity produces a lower HIPPS code and a lower daily rate for the entire covered stay a revenue gap that is invisible until someone audits the HIPPS distribution against the clinical record.
What this means for your facility: MDS accuracy is a billing function as much as a clinical one. A pre-submission review that validates PDPM component coding against the clinical record before the assessment is locked particularly for the Nursing and NTA components is the single highest-leverage revenue protection step in the SNF billing process.
Step 3: The Triple Check Process
What Happens
The Triple Check is a Medicare-required pre-billing validation that must be completed before any Medicare Part A claim is submitted. It validates three dimensions simultaneously: clinical accuracy (MDS completion, PDPM coding, and skilled care documentation), financial accuracy (charges entered match services delivered), and compliance accuracy (physician orders are in place, certification timelines are met, and payer eligibility is confirmed).
Where Revenue Gets Lost
A Triple Check completed mechanically quickly reviewed to meet a submission deadline rather than substantively validated produces the same paperwork as a thorough Triple Check but none of the revenue protection. Billing teams that treat the Triple Check as a checkbox requirement rather than a substantive pre-submission review consistently submit claims with correctable errors that generate first-pass denials. Each denial requires correction and resubmission, delaying payment by two to four weeks and consuming billing staff time that should be directed at AR management.
What this means for your facility: The Triple Check should be a non-negotiable step in every Medicare Part A billing cycle with exceptions resolved before the claim batch is released, not cleared to meet a deadline. Facilities that execute the Triple Check rigorously consistently achieve first-pass claim acceptance rates above 95%.
Step 4: Claim Submission
What Happens
SNF claims are submitted on the UB-04 claim form using the correct Type of Bill code (21X for Medicare Part A), revenue codes appropriate to the services provided, the HIPPS code derived from the PDPM assessment, ICD-10-CM diagnosis codes, and the required condition and occurrence codes. Medicare Part A claims are typically submitted monthly or at discharge. Medicare requires submission within twelve months of the date of service.
Where Revenue Gets Lost
The most permanent revenue loss in the SNF billing process occurs here not through claim errors that can be corrected, but through timely filing failures that cannot. A claim submitted after the twelve-month Medicare timely filing deadline is denied permanently, with no appeal remedy regardless of the underlying clinical merit. In facilities without systematic timely filing monitoring, accounts in the 90-day to 120-day AR bucket approach this deadline without triggering urgent action and when the deadline passes, the revenue is gone.
What this means for your facility: Every active AR account should be reviewed against its timely filing deadline on a regular schedule weekly at minimum. Accounts approaching the twelve-month window should be prioritized above all other AR activity. Once the deadline passes, there is no recovery.
Step 5: Remittance Review and Payment Posting
What Happens
When Medicare and other payers process claims, they issue Remittance Advice (RA) documents that show which claims were paid, which were adjusted, and which were denied. Payment posting is the process of recording those payments against the correct resident accounts. Accurate payment posting is the foundation of accurate AR aging if payments are posted incorrectly, AR reports misrepresent outstanding balances and billing staff pursue accounts that have been paid.
Where Revenue Gets Lost
Delayed or inaccurate remittance posting creates AR inflation accounts that appear open because payments have not been posted. When billing staff use AR aging reports to prioritize follow-up, inflated AR sends them to accounts that don’t need attention while genuinely aged accounts receive less follow-up than they require. Payer-specific payment processing issues such as electronic remittances arriving in non-standard formats or paper checks requiring manual posting create consistent posting delays that compound over billing cycles.
What this means for your facility: Payment posting should occur within 24 hours of remittance receipt. Any payer-specific posting issues should be identified and resolved at the operational level not absorbed as a routine delay that distorts AR reporting for the entire facility.
Step 6: Denial Management
What Happens
When a claim is denied, the billing team receives an explanation of benefits or remittance advice noting the denial reason code. The denied claim must be reviewed, the root cause identified, and the claim either corrected and resubmitted or appealed through the appropriate payer process. Medicare Part A denials can be appealed through the five-level Medicare appeals process, beginning with Redetermination.
Where Revenue Gets Lost
Denials that are not addressed promptly age toward write-off. A denial received today requires action within days not weeks to remain viable for correction or appeal. Facilities without a structured same-day denial routing process allow denied claims to accumulate in queues without active follow-up, and by the time they are reviewed, the opportunity for timely resubmission may have narrowed. Systemic denials the same denial code appearing repeatedly across multiple claims indicate a billing process error that is generating revenue loss every billing cycle until the root cause is identified and corrected.
What this means for your facility: Every denied claim should be routed the same day it is received to a billing specialist with the knowledge to assess the root cause and initiate the appropriate response. Denial trends should be reviewed monthly to identify systemic patterns that require process correction rather than individual claim correction.
Step 7: AR Collections and Write-Off Management
What Happens
Accounts receivable management is the ongoing process of monitoring outstanding balances, following up on unpaid claims, managing payment arrangements for private pay residents, and making documented decisions about write-offs. AR aging reports segment outstanding balances by payer type and aging bucket 30, 60, 90, 120 days, and beyond and provide the primary tool for identifying where collection activity needs to be concentrated.
Where Revenue Gets Lost
AR aging that is reviewed at summary level total balances without payer-level or account-level breakdowns misses the specific accounts that require immediate action. A 90-day AR bucket that is growing without a documented review and action plan signals a collection process that is not keeping pace with billing volume. Write-offs that are approved without a documented evaluation of recovery potential permanently close accounts that a structured collections process could have recovered.
What this means for your facility: AR management is not a reporting function it is a collections function. The report is the tool. What matters is what the billing team does with the information the report provides. Every account in the 60-day-plus bucket should have a documented action plan, and no account should be written off without a formal review of all available collection avenues.
How MCA Medical Billing Solutions, L.L.C. Manages the Full SNF Billing Process
MCA Medical Billing Solutions, L.L.C. manages every step of the SNF billing process from eligibility verification at admission through final AR collections exclusively for skilled nursing facilities. Our ZARI guarantee commits to eliminating collectable AR over 180 days within six months of engagement, or we work free for the remaining six months of your contract.
If your facility is experiencing revenue losses at any stage of the billing cycle, contact MCA Medical Billing Solutions, L.L.C. for a free billing assessment.