Home Health NOA: Ultimate 5-Day Guide to Avoid Late Mistakes

A home health NOA that reaches Medicare even a few days late quietly cuts your 30-day payment, and most agencies don’t notice until the remittance arrives. There is no denial and no warning, just a smaller check for care you already gave.

This guide explains the home health NOA in plain terms: what it is, how the 5-day rule is counted, how the late penalty is calculated with real numbers, the four exceptions and how to request them, and the mistakes we see most.

What Is a Home Health NOA?

The home health NOA (Notice of Admission) tells Medicare that your agency has admitted a patient and opens that patient’s home health admission period in Medicare’s systems. It replaced the Request for Anticipated Payment (RAP) on January 1, 2022 (CMS MLN Matters MM12256).

• It pays nothing by itself. Unlike the old RAP, the home health NOA is a notice, not a request for payment.
• One NOA per admission. CMS requires only one NOA for a continuous series of 30-day periods, from admission until discharge. You don’t file a new one every 30 days.
• A new admission needs a new NOA. After a discharge, the next admission needs its own NOA before you bill its periods.
• It makes your agency the primary HHA. The agency whose NOA processes first is recorded as the primary home health agency for that period (Medicare Claims Processing Manual, Chapter 10).

Home Health NOA Deadline: The 5-Day Rule

The home health NOA must be submitted to and accepted by your MAC within 5 calendar days after the start of care. CGS explains the count: start counting the day after the start of care (admission) date. So if care started on October 1, the NOA is due by October 6.

How to Submit a Home Health NOA: 6 Steps

1. Get the order. Make sure you have a verbal or written order from the physician or allowed practitioner for the services in the initial visit.
2. Complete the initial visit. The start of care date is the date of the first billable visit. Don’t send the NOA before this visit happens.
3. Check eligibility. Use HETS or your MAC’s portal to confirm Original Medicare (not Medicare Advantage), and check for an open home health period from another agency.
4. Enter the NOA on TOB 32A. Use the correct start of care date, the patient’s MBI and your agency’s provider identifier for the location that gave the care.
5. Submit the same day if you can. Don’t wait for day 5. A rejection late in the window leaves no time to fix it.
6. Confirm acceptance. Check the NOA status in your MAC’s system the next business day. Fix and resubmit any rejection right away.

See our home health billing services for full support with NOAs, PDGM claims, OASIS timing and consolidated billing.

Late Home Health NOA Penalty: How the 1/30th Reduction Works

When a home health NOA is late, Medicare reduces the payment for the 30-day period, including any outlier payment. The reduction equals the number of days from the start of care until the NOA is filed, divided by 30, times the 30-day payment (Claims Processing Manual, Chapter 10, §10.1.10.3). The agency absorbs it and can’t bill the patient.

Formula: Reduction = 30-day payment × (days from start of care to NOA ÷ 30)

The worked example below uses $2,038.22, the CY 2026 national standardized 30-day period payment from the CY 2026 Home Health PPS final rule. Your real payment is adjusted for case-mix and wage index, so your dollar amounts will differ. The math works the same way.

Uses the CY 2026 national standardized 30-day amount before case-mix and wage adjustment. Day counts follow the Claims Processing Manual: days from the start of care to the NOA date.

What this means: missing the deadline by only four days (filing on day 9 instead of day 5) costs $611.47 on this one period. Because the count starts at the start of care, not at day 5, the penalty jumps from $0 to a large amount as soon as the NOA is late. If your NOA is late across more than one 30-day period, each affected period can be reduced.

Late NOA Exceptions and How to Request Them

CMS allows an exception to the late home health NOA penalty only in four situations (CMS MM12256):

1. Disasters: fires, floods, earthquakes or other unusual events that badly damage the agency’s ability to operate.
2. System problems: a CMS or MAC systems issue beyond your control that stops you from filing.
3. New agencies: a newly certified HHA notified of its certification after the certification date, or still waiting for its MAC user ID.
4. Other circumstances that CMS or your MAC decides were beyond your control. CGS gives late notice of a patient’s disenrollment from a Medicare Advantage plan as an example.

How to request an exception (CGS):

• Add modifier KX to the HIPPS code on the revenue code 0023 line of the period of care claim.
• Explain the reason in the claim’s Remarks field with enough detail for the MAC to check it. Example from CGS for an MA disenrollment: “CR12256 disenroll MA XX/XX/XXXX” with the date MA coverage ended.
• If the late NOA covers more than one 30-day period, request the exception on each claim.
• Don’t file an appeal. CGS says the exception process is the required action. If your remarks are too thin, the MAC may return the claim for more information.

Exceptions are not granted when the agency made no attempt to file on time, could have fixed the NOA without waiting for Medicare systems, sent a partial NOA just to meet the deadline, or used the provider identifier of a location that didn’t give the care.

Common Home Health NOA Mistakes (and How to Fix Them)

For a broader process to stop claim problems before they start, read how to reduce claim denials. For patients who switch between Medicare Advantage and Original Medicare, our guide to Medicare open enrollment for providers covers eligibility checks.

Home Health NOA and Consolidated Billing

Filing on time does more than protect your payment. Medicare opens the admission period in its Common Working File when it processes the NOA, and the agency whose NOA processes is recorded as the primary HHA for that period (Claims Processing Manual, Chapter 10).

That open period is what lets Medicare enforce home health consolidated billing: outside therapy providers and suppliers that bill bundled services during your period get denied, instead of being paid for care your agency is responsible for. Another agency’s NOA for the same patient is rejected while your period is open, unless it’s a transfer or a discharge and readmission. Learn more in our guide to home health consolidated billing.

Texas Note

The home health NOA is a Medicare requirement. Texas Medicaid home health services follow their own rules, including prior authorization through TMHP for fee-for-service clients and through STAR, STAR+PLUS and STAR Kids plans for managed care members. [VERIFY: Texas Medicaid home health prior authorization and billing rules in the TMHP Home Health Nursing and Private Duty Nursing Services Handbook] For dual-eligible patients, file the Medicare NOA on time first, then follow Texas Medicaid’s rules for any Medicaid-covered services. Texas agencies can get help from our Austin medical billing team.

FAQs

What is a home health NOA?

A home health NOA (Notice of Admission) tells Medicare that a home health agency has admitted a patient. It opens the patient’s admission period in Medicare’s systems and makes the agency the primary HHA. It replaced the RAP on January 1, 2022 and is filed once per admission on type of bill 32A.

When is a home health NOA due?

The NOA must be submitted to and accepted by your MAC within 5 calendar days after the start of care. CGS says to start counting the day after the start of care date. For a start of care on October 1, the NOA is due by October 6.

How is the late NOA penalty calculated?

Medicare reduces the 30-day period payment by 1/30th for each day from the start of care until the NOA is filed. For a $2,038.22 period, an NOA filed 9 days after the start of care loses 9/30, or $611.47. The agency absorbs the reduction and can’t bill the patient for it.

What are the exceptions for a late NOA?

CMS allows four: disasters that badly damage the agency’s ability to operate, CMS or MAC system problems, newly certified agencies notified late or waiting for a user ID, and other circumstances the MAC or CMS decides were beyond the agency’s control, such as late notice of a Medicare Advantage disenrollment.

What type of bill is used for a home health NOA?

The home health NOA is submitted on type of bill 32A. If the NOA has an error, such as a wrong start of care date, you cancel it with type of bill 32D and submit a new, corrected 32A.

Do I need a new NOA for every 30-day period?

No. CMS requires only one NOA for a continuous series of 30-day periods, from admission until discharge. You need a new NOA only when the patient is discharged and later readmitted, or in a transfer to another agency.

Can a late NOA be appealed?

No. CGS says agencies should not file an appeal for a late NOA. If one of the four exceptions applies, request it on the claim by adding modifier KX to the HIPPS code on the revenue code 0023 line and explaining the reason in the remarks.

Never Lose a 30-Day Payment to a Late NOA

A late NOA is one of the easiest losses to prevent. Send it the day of the start of care visit, confirm acceptance the next business day, and save KX exceptions for the rare cases that truly qualify.

DocMBS manages NOAs, PDGM claims and consolidated billing for home health agencies. See our home health billing services or book a free billing review.

This article is for education only. Rules and rates change. Confirm with your Medicare Administrative Contractor before submitting NOAs or claims.

Sources

• CMS (via HHS Guidance Portal): MLN Matters MM12256: Replacing Home Health RAPs with a Notice of Admission
• CMS: Medicare Claims Processing Manual, Chapter 10: Home Health Agency Billing
• CMS: MLN Matters MM14304: Home Health PPS CY 2026 Rate Update
• CGS: Late NOA Exception Process
• TMHP: Texas Medicaid Provider Procedures Manual

Last updated: October 2026.