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A home health claim isn't a single CPT code on a CMS-1500. It's a 30-day payment period anchored to an OASIS assessment, a diagnosis that has to sort into a clinical group, a Notice of Admission on a five-day clock, and a final claim submitted on an institutional form. We manage each piece so the period reaches the payer clean.
Working with Medicare-certified home health agencies nationwide.
Payment periods under PDGM, inside a 60-day certification
Case-mix groups an admission can be sorted into
Window to file the Notice of Admission, or take a penalty
HHVBP swing on Medicare fee-for-service payments
Home health reimbursement runs on the Patient-Driven Groupings Model, which pays based on the clinical picture captured at the start of care rather than the number of therapy visits delivered. That shift moved OASIS accuracy and diagnosis coding out of the back office and into the center of what actually gets paid. A period groups into one of twelve clinical categories, and the accuracy of that grouping decides whether the claim pays in full, drops into a low-utilization adjustment, or gets returned before anyone even reviews it.
Many agencies still treat the OASIS assessment and the diagnosis list as clinical paperwork, separate from billing. Under PDGM, that gap is where money disappears, one period at a time, without ever showing up as a denial. Home health billing services exist to close it: to connect what a clinician documents in the home to what a coder submits, so the two match before the claim ever reaches Medicare.
None of these show up in a typical physician billing cycle, and each one can reduce what a period pays.
The Notice of Admission has to reach the Medicare Administrative Contractor within five calendar days of the start of care. Miss it, and payment for that period drops for every day the filing runs late, regardless of how the care itself went.
Certification and the plan of care follow a sixty-day cycle, while payment is calculated in thirty-day periods inside it. Each period bills and groups on its own, so one certification can produce two claims with two different outcomes.
Every clinical group carries its own low-utilization threshold, somewhere between two and six visits. Drop below it during a period and Medicare switches from the full period rate to a per-visit rate, almost always a lower total.
Secondary diagnoses can add a payment adjustment when they're documented with enough specificity. Left vague, or left off the list, that adjustment simply never gets billed, even when the chart supports it.
A symptom code such as dizziness or generalized weakness doesn't map to any clinical group, so the claim comes back unpaid until the real underlying condition is coded.
A slow handoff from intake to billing turns a routine filing into a daily penalty on a period that was otherwise clean.
If the encounter documentation is undated, unsigned, or doesn't connect to the reason for home health, the certification behind the claim is exposed.
When the functional scores or diagnosis list on the claim don't match the assessment, the HIPPS code no longer reflects the real grouping, inviting both underpayment and audit attention.
Orders and plans of care signed after the fact carry the same denial risk as a missing encounter note.
Under Medicare Advantage, an expired visit authorization is one of the most common denial reasons, and it has nothing to do with whether the care was appropriate.
OASIS drives the grouping. A coder who hasn't read the assessment is guessing.
The principal diagnosis has to explain the actual reason skilled care is needed and has to fall inside one of the twelve PDGM clinical groups. Secondary diagnoses matter just as much: captured completely and with real specificity, they can add a comorbidity adjustment the record already supports but nobody billed for.
On the claim, each discipline reports its own visit under its own code, and the certifying practitioner bills certification and oversight separately from the visits themselves. None of it holds up without documentation behind homebound status, the skilled need, the signed orders, and the face-to-face encounter.
Fine print: codes below are examples. The record always determines the correct code.
Four payer types, four different sets of rules to track.
Runs on PDGM, the Notice of Admission, and the institutional claim form. It's the most predictable payer of the group, as long as intake, coding, and the five-day filing all hold together.
Each plan sets its own authorization rules, often capping visits by discipline and paying per visit or on a case rate instead of following PDGM. Authorizations need tracking plan by plan, and this share of the census keeps growing.
State rules vary widely, and under federal Electronic Visit Verification requirements, a visit that isn't captured through EVV can be rejected regardless of how well it's charted.
Agencies in Illinois, Ohio, Texas, North Carolina, Florida, and Oklahoma choose between pre-claim review and postpayment review. A strong affirmation rate earns relief from most future reviews, so documentation quality has a direct payoff.
Skipping a step out of order is how periods end up unpaid in this specialty.
Homebound status, payer, authorization, and diagnosis specificity get confirmed before the admission is even opened.
Filed inside the five-day window as a rule, not as a goal.
Principal and secondary diagnoses are checked against OASIS before submission, so nothing gets returned for a grouping problem.
The code on the claim is confirmed against the real clinical grouping before it goes out.
Filed on the correct type of bill as soon as the period closes, with visit counts watched against the LUPA threshold the whole time.
A returned claim gets fixed and resubmitted by reason code, and repeat reasons get flagged back to intake.
Aged accounts get worked by payer and by reason, and Medicare Advantage authorizations are tracked so none expire mid-period.
Reporting loops back to the quality measures that move the value-based payment adjustment, not just the claims that already paid.
This isn't a general billing desk that treats every claim the same. The aim is fewer returned claims, faster payment on clean periods, and an AR balance that reflects the care actually delivered.
A vague referral diagnosis gets flagged before it turns into a return-to-provider claim.
Every Notice of Admission is tracked against its five-day deadline as it happens, not chased down after the fact.
Principal and secondary diagnoses are coded to match the real OASIS picture, and the HIPPS code is checked to match.
Visit counts are monitored against the threshold while the period is still open, not discovered afterward.
Returned claims and denials get corrected and resubmitted, and recurring reasons get reported back so they stop repeating.
For agencies operating under Review Choice Demonstration, documentation is prepared to hold up under pre-claim review.
The NOA opens the payment period in Medicare's system and starts the consolidated billing edits tied to it. It has to be accepted by the Medicare Administrative Contractor within five calendar days of the start of care. Every day past that deadline reduces the period's payment by one-thirtieth, so the filing date has a direct effect on what the final claim is worth.
Symptom codes and unspecified codes generally don't sort into any of the twelve PDGM clinical groups, so the grouper has nothing to work with and the claim comes back unpaid. The fix is going back to the referring provider for the actual condition behind the symptom before the claim is submitted.
Each clinical group has its own visit threshold, somewhere between two and six visits. Fall below that number during the period and Medicare pays per visit instead of the full period rate, which is almost always less. Watching the count while the period is open is the only way to catch this before it affects payment.
No. Each MA plan sets its own authorization and payment structure, often approving a fixed number of visits per discipline and paying per visit or on a case rate rather than following PDGM. Authorizations usually need renewal as care continues, and a lapsed one is a common, entirely avoidable denial reason.
Agencies in Illinois, Ohio, Texas, North Carolina, Florida, and Oklahoma choose between pre-claim review and postpayment review. Pre-claim review means the eligibility and documentation package goes in for an affirmation decision ahead of the final claim. A consistently high affirmation rate earns relief from most future reviews, so documentation quality reduces both workload and payment delay.
OASIS answers set the functional impairment level, which feeds directly into the clinical grouping and the HIPPS code on the claim. When the assessment and the claim don't agree, the period can be misgrouped, which leads to underpayment or draws audit attention. Everything on the claim depends on what the assessment actually says.
Physicians can certify eligibility, along with nurse practitioners, physician assistants, and clinical nurse specialists acting as allowed practitioners. Whoever certifies still has to complete the face-to-face encounter tied to the primary reason for home health and sign the orders and plan of care on time for the certification to hold up.
