A home health billing service manages the full revenue cycle for a home health agency — eligibility and authorization verification, OASIS-driven case-mix assignment, Notice of Admission (NOA) submission, coding of the principal and comorbid diagnoses, 30-day period claim production, denial appeals, and accounts receivable follow-up. Under the Patient-Driven Groupings Model (PDGM), payment is tied to a 30-day unit of payment rather than to visit volume, which means the money an agency earns is decided largely by documentation and data accuracy that happen days before a claim is ever produced. A specialized billing partner exists to control those upstream inputs — the OASIS assessment, the diagnosis sequence, the start-of-care date, the NOA clock — and then to convert them into clean, timely claims that pay the first time.
AMS Solutions has been doing revenue cycle work since 1992 — over 30 years of watching Medicare payment models change and rebuilding client workflows to match. Home health is one of the specialties where that history matters most, because the rules have been rewritten twice in the last decade and the operational habits many agencies still carry were built for a payment model that no longer exists.
A Dedicated Team for Your Home Health Agency
You are assigned a named team, not a ticket queue. That team learns your intake process, your EMR, your referral sources, your payer mix, and the clinicians whose documentation consistently needs a second look. They know which of your referral partners send incomplete face-to-face documentation and which ones send OASIS data that survives review untouched.
That structure exists because home health billing is not a back-office function that can be run at arm’s length. The billing team has to be close enough to your clinical operation to flag a missing signature on day two rather than day forty, and close enough to your intake staff to catch a start-of-care date that was entered before the referral was actually accepted. Our U.S.-Based Specialists are credentialed through AAPC, and work inside your systems rather than exporting your data into a black box. Owners and administrators get direct phone access to the people touching their claims.
Home Health Billing and Coding Expertise
PDGM Case-Mix and the Four Clinical Grouping Inputs
PDGM was implemented January 1, 2020 under section 1895(b) of the Social Security Act and is codified at 42 CFR 484.205. Each 30-day period is grouped using four inputs: admission source (community versus institutional), timing (early versus late period), clinical grouping (driven by the principal diagnosis reported on the claim), and functional impairment level (derived from OASIS responses). A comorbidity adjustment is layered on top.
Every one of those four inputs is an operational decision made by a person. Admission source depends on whether intake correctly captured a qualifying acute or post-acute stay. Timing depends on whether the period sequence was tracked accurately across an episode. Clinical grouping depends on whether the coder selected a principal diagnosis that actually maps to a payment group rather than one that leaves the claim unassignable. We audit all four before the claim goes out, not after the remittance comes back.
OASIS Accuracy as a Reimbursement Driver
The Outcome and Assessment Information Set (OASIS) is the standardized patient assessment instrument home health agencies must complete and submit to CMS. It drives PDGM case-mix assignment and Home Health Quality Reporting Program measures — meaning the same document determines both what you get paid and how you appear publicly on quality reporting.
We review OASIS functional items against the clinical narrative before the period is billed. The recurring failure is not fraud; it is understatement. A clinician documents a patient as more independent than the visit note describes, the functional impairment level lands lower than the patient’s actual condition supports, and the agency underbills a period it legitimately earned. The reverse — scoring that the documentation does not support — is an audit exposure. Both are corrected in the same review pass.
LUPA Thresholds and Visit Utilization
Under PDGM, each case-mix group carries its own low-utilization payment adjustment (LUPA) threshold. Fall below the visit count for that group and the 30-day period is paid per visit rather than as a full period payment. Because thresholds vary by group rather than sitting at a single number, scheduling staff cannot manage LUPA risk by memory.
We monitor visit counts against the assigned group’s threshold during the period, while there is still time to act clinically, and surface periods that are one or two visits short. The point is never to add visits a patient does not need — it is to make sure a medically necessary visit that was scheduled and then dropped for staffing reasons does not silently convert a full period payment into a per-visit payment.
Notice of Admission Timeliness
The Notice of Admission must be submitted within 5 calendar days after the start of care date. When it is late, under 42 CFR 484.205, the wage and case-mix adjusted 30-day period payment amount is reduced by 1/30th for each day from the home health start of care date until the date of filing of the NOA.
Two things about that rule are widely misunderstood. It is a per-day reduction, not a flat penalty — a two-day delay and a twenty-day delay are not the same event. And the reduction cannot exceed the total claim payment. We track the NOA clock from the moment the start of care date is entered, escalate on day three, and reconcile submitted-versus-accepted status rather than assuming a transmitted NOA was received.
Comorbidity Coding
PDGM applies a comorbidity adjustment based on secondary diagnoses reported on the claim. Agencies routinely lose this adjustment because the referral packet lists the patient’s full problem list but the claim carries only the diagnoses the field clinician wrote down at the first visit.
Our coders reconcile the hospital discharge summary, the face-to-face documentation, the physician orders, and the OASIS against the diagnoses actually submitted — and code only what the record supports. Where a comorbidity is clinically evident but undocumented, the finding goes back to the clinician as a query, not onto the claim.
From RAP to NOA: Claim Sequencing
Agencies that operated under the Request for Anticipated Payment model built billing calendars around a split-payment rhythm. That rhythm is gone. The one-time NOA replaced the RAP, no anticipated payment arrives, and cash now depends entirely on the final claim for each 30-day period being produced accurately and on schedule.
We rebuild the billing calendar around that reality: NOA filed and accepted, period tracked, final claim produced immediately at period end with visits, supplies, and diagnoses reconciled. Sequencing errors — a second period billed before the first is finalized, or a final claim submitted against an NOA that was never accepted — are among the most common causes of avoidable rejections we see in new client audits.
Why Home Health Billing Goes Wrong
Most home health revenue leakage is not caused by billing staff. It is caused by information arriving late or incomplete, and by a payment model that punishes both.
The dominant drivers we find in agency audits are: NOA delays created by referral intake that starts the clock before documentation is in hand; OASIS inconsistencies between assessment responses and the clinical narrative; principal diagnosis selection that fails to map to a PDGM clinical group; face-to-face documentation that is present but does not support the certifying physician’s homebound and skilled-need determination; missed comorbidity capture; and LUPA exposure that nobody sees until the remittance arrives.
Underneath all of these sits the same structural problem: the people who generate the data (clinicians and intake staff) are not the people who feel the consequence (billing and ownership), and the feedback loop between them is usually weeks long. Shortening that loop is most of the job.
Rate pressure sharpens it. The CY2026 final rule (CMS-1828-F) decreased home health payments by an estimated 1.3%, or $220 million. For CY2027, the proposed rule (CMS-1844-P, issued July 1, 2026 and published July 6, 2026) proposes that Medicare payments to home health agencies would increase in the aggregate by 2.4%, or $420 million — reflecting a 2.1% payment update alongside a proposed 3.0% temporary adjustment reduction to the base rate. The CY2027 rule also proposes moving Home Health QRP OASIS and HHCAHPS reporting to a calendar-year basis. Nothing in CMS-1844-P is final, and we do not advise agencies to budget as though it is — but the direction of travel is clear enough that agencies operating with loose documentation discipline have less room than they used to.
Our Home Health Revenue Cycle Workflow
Intake and eligibility. Insurance verification, benefit period confirmation, admission source determination, and authorization capture before the start of care date is finalized.
NOA submission and confirmation. Filed within the 5-calendar-day window and tracked through acceptance — not just transmission.
OASIS and coding review. Assessment responses reconciled against the clinical record; principal diagnosis selected for PDGM grouping accuracy; comorbidities captured from the full documentation set; clinician queries issued where the record is ambiguous.
Period monitoring. Visit utilization tracked against the assigned group’s LUPA threshold; certification and recertification dates monitored; face-to-face documentation confirmed before it becomes a denial.
Claim production and scrubbing. Final claims built at period end with visits, supplies, and diagnoses reconciled, then run through edits before submission.
Denial management and appeals. Every denial worked to root cause, categorized, and reported back — so the same denial reason does not recur next quarter.
A/R follow-up and reporting. Aging worked by payer and by bucket, with monthly reporting on denial categories, days in A/R, LUPA incidence, and NOA timeliness so ownership can see where the operation is actually leaking.
Compliance and Data Security
AMS Solutions maintains HIPAA compliance across all operations, and our coding staff hold AAPC credentials. Protected health information is handled under signed business associate agreements, with role-based access controls, encrypted transmission and storage, audit logging of record access, and workforce training on privacy and security requirements.
Our specialists are U.S.-based. Coding decisions are made against the documentation in the record — we do not upcode to a target, and we do not bill a case-mix level the OASIS and clinical narrative will not support under audit. When documentation is insufficient, the answer is a clinician query, not a favorable assumption.
Frequently Asked Questions
What happens if our NOA is filed late?
Under 42 CFR 484.205, the wage and case-mix adjusted 30-day period payment amount is reduced by 1/30th for each day from the home health start of care date until the date the NOA is filed. It is a per-day reduction rather than a flat penalty, and the reduction cannot exceed the total claim payment for that period. A one-day delay costs one-thirtieth; the exposure grows daily until the NOA is filed.
How does OASIS affect what we actually get paid?
OASIS is the standardized assessment instrument agencies must complete and submit to CMS, and the functional items within it feed directly into PDGM’s functional impairment level. It also drives Home Health Quality Reporting Program measures. That means an OASIS inconsistency is simultaneously a payment problem and a quality-reporting problem, which is why we review assessments against the clinical narrative before the period is billed rather than after.
What are the four inputs to a PDGM case-mix group?
Admission source (community or institutional), timing (early or late 30-day period), clinical grouping determined by the principal diagnosis reported on the claim, and functional impairment level derived from OASIS. A comorbidity adjustment is applied on top of the resulting group. Each input is set by a specific person at a specific step in your intake and clinical workflow, which is where we audit them.
Is the CY2027 payment increase confirmed?
No. CMS-1844-P is a proposed rule, issued July 1, 2026 and published July 6, 2026. It proposes that Medicare payments to home health agencies in CY2027 would increase in the aggregate by 2.4%, or $420 million, reflecting a 2.1% payment update and a proposed 3.0% temporary adjustment reduction to the base rate. It also proposes moving HH QRP OASIS and HHCAHPS reporting to a calendar-year basis. Until a final rule is issued, none of it should be treated as settled.
How do you handle LUPA risk without adding unnecessary visits?
We track visit counts against the LUPA threshold for the specific case-mix group assigned to that period, and we flag periods that are running short while the period is still open. The escalation goes to your clinical leadership, not to billing — the decision to add or restore a visit is always a clinical one. What we prevent is a medically necessary visit being dropped for scheduling reasons and nobody realizing until the remittance arrives.
Do you work inside our EMR or move our data somewhere else?
We work in your systems. Your team keeps its existing clinical and scheduling workflow, and our billing specialists operate within your EMR under role-based access governed by a business associate agreement. That matters for OASIS and documentation review specifically, because the value of the review comes from seeing the full record — assessment, visit notes, orders, and face-to-face documentation — in one place rather than from a claims extract.
Request a Home Health Billing Assessment
If you want a clear read on where your agency is losing revenue, we will review a sample of your recent 30-day periods, NOA timeliness, denial categories, and A/R aging, and walk you through what we find. There is no obligation and no cost for the review.
Complete the form below to get started, or call us directly at 866-973-2221 to speak with a home health billing specialist.
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