If your agency misses the 5-day Notice of Admission deadline, Medicare cuts your payment by 1/30 for every day from the start of care until the NOA is filed. The penalty starts on day one, not day six. The reduction is 1/30th of the wage-adjusted 30-day period payment for each day from the start of care date until the NOA is submitted.
Who this is for: California home health agency owners and billing staff billing Original Medicare who have just missed an NOA, or want to make sure it never happens.
What the NOA is and when the clock starts
The Notice of Admission (NOA) tells Medicare that your home health agency (HHA) has admitted a patient. Medicare replaced Requests for Anticipated Payment (RAPs) with a one-time NOA starting January 1, 2022, submitted as type of bill (TOB) 32A. TOB is the four-digit code on an institutional claim that tells Medicare what kind of bill it is.
You file one NOA per admission, not one per 30-day period. A single NOA covers the whole series of 30-day periods from admission to discharge. Once you report a discharge, you need a new NOA before billing any further claims.
You can’t file the NOA until two things have happened. You need a written or verbal order from the physician or allowed practitioner for the initial visit, documented as required, and the initial visit must be done with the patient admitted.
How to count the 5 days
The NOA is timely only if the MAC receives and accepts it within five calendar days after the start of care. Day one is the day after the start of care date. A MAC is the private contractor that processes Medicare claims for your region. For California home health and hospice, that’s National Government Services, per CMS’s MAC jurisdiction listing. NGS was renamed Wellpoint Federal on April 1, 2026, with no change to its Medicare contracts.
Calendar days include weekends and holidays. Here’s how that plays out:
| Start of care | Day 1 | Day 5 (last timely day) |
|---|---|---|
| Monday, March 2, 2026 | Tuesday, March 3 | Saturday, March 7 |
Also note the word “accepted.” A rejected NOA that you fix on day 7 counts as a day 7 NOA. Submit early enough that you have time to correct a rejection inside the window.
What a late NOA costs you
This is the part that surprises agencies. The penalty doesn’t start at day six. Medicare reduces the payment for the period, including any outlier payment, by the number of days from the admission date to the date the MAC receives and accepts the NOA, divided by 30.
| NOA accepted | Approximate reduction to the first 30-day period |
|---|---|
| Within 5 days | None |
| 6 days after start of care | 6/30 (20%) |
| 10 days after start of care | 10/30 (about 33%) |
| 15 days after start of care | 15/30 (50%) |
| 30 or more days after start of care | Full first period, and later periods are hit too |
Your MAC calculates the exact day count. Check your remittance advice, the payment explanation Medicare sends with each claim, to confirm the figure.
Two more consequences. A late NOA can span more than one 30-day period, and each period gets its own reduction. You also receive no Low Utilization Payment Adjustment (LUPA) per-visit payments for visits that fell before the NOA was submitted. LUPA is the per-visit payment Medicare makes when a 30-day period has too few visits to earn the full period payment.
What to do today if you just missed it
- Submit the NOA now. Every day you wait adds another 1/30 to the reduction. File through Direct Data Entry (DDE), Medicare’s online claim entry system, if your electronic route is slower.
- Confirm acceptance. Check that the NOA is accepted, not just sent. Write down the acceptance date.
- Decide if an exception applies. Read the next section before you do anything else with the claim.
- Document the timeline. Record the start of care date, order date, initial visit date, and every submission attempt with its result. You’ll need this for the claim remarks.
- Fix the cause. Find out why it was late so the next admission doesn’t repeat it.
Don’t file an appeal. NGS says the HHA should not appeal a late NOA penalty, because the exception process is the required route.
Does your situation qualify for an exception?
An approved exception waives the penalty. CMS lists four qualifying circumstances: fires, floods, earthquakes, or similar events that severely damage your ability to operate; a CMS or MAC systems problem beyond your control; a newly Medicare-certified HHA notified of certification after its certification date, or still awaiting its MAC user ID; and other circumstances the MAC or CMS finds were beyond your control.
Exceptions are denied in specific situations. The MAC won’t grant one if you could have corrected the NOA without waiting on Medicare systems, if you submitted a partial NOA just to meet the deadline, or if an agency with multiple provider identifiers used a location that didn’t provide the service.
One common excuse no longer works. Palmetto GBA states that for NOAs on or after January 1, 2024, MACs won’t grant exceptions for Medicare Beneficiary Identifier (MBI) changes the HHA could have seen more than two weeks before admission.
A disenrollment from Medicare Advantage can qualify. NGS gives the example of a late notice that a patient left their Medicare Advantage plan, billed with the KX modifier and a remark stating the date MA coverage ended.
Staff forgetting, short staffing, or a missed intake handoff are internal problems. Based on the CMS criteria above, they don’t fit any of the four categories. An exception request is never guaranteed, even when you think it fits.
How to request the exception on the claim
You request the exception on the period of care claim (TOB 329), not the NOA. Append modifier KX to the HIPPS code on the 0023 revenue code line, and give enough detail in the Remarks section for the MAC to research the case. If the remarks are too thin, the MAC may return the claim. HIPPS is the payment code that reflects your patient’s case mix grouping.
If the NOA was late enough to span more than one period, you need a separate exception request for each 30-day period affected.
Don’t add KX when the NOA was on time. Palmetto GBA warns that putting the KX modifier or remarks on claims with timely NOAs causes the claim to suspend, delays processing, and can get the claim returned.
If a timely NOA needed correcting, the rules are different. If you cancel a timely NOA with TOB 032D to fix an error, add a remark such as “Timely NOA, cancel and rebill,” append KX, and resubmit the corrected NOA within two business days.
Can you bill the patient for the lost amount?
No. The reduction is the provider’s liability, and the provider may not bill the beneficiary for it.
Does this apply to Medicare Advantage and Medi-Cal?
The NOA rule above is an Original Medicare requirement. Medicare Advantage plans and Medi-Cal managed care plans set their own admission notice and authorization rules in their provider manuals and contracts. Some MA plans copy the Medicare approach: Wellcare’s Medicare bulletin tells home health providers to submit an NOA within five calendar days using TOB 32A, with a 1/30 reduction if it’s late.
Check each plan’s provider manual for its notice rules. CNB’s prior authorization team tracks these requirements payer by payer.
Where NOAs go late: the failure points to check
These are the handoffs where the 5-day window gets lost:
- Order documentation. The verbal order came in, but nobody wrote it down in a way billing can see.
- Initial visit to billing handoff. The clinician finished the visit on a Friday, and billing heard about it on Tuesday.
- Eligibility and MBI. The patient’s Medicare number was wrong or outdated, so the NOA rejected.
- Rejections nobody saw. The NOA was sent but rejected, and no one checked for acceptance.
- Weekend admissions. Admissions late in the week lose two of their five days to the weekend.
A 5-day NOA control you can set up this week
- Treat the initial visit as the billing trigger. Clinical staff notify billing the same day the initial visit is done.
- Verify eligibility and the MBI before the first visit, not after.
- Keep a daily NOA log: patient ID, start of care date, day 5 date, submission date, acceptance date.
- Check for acceptance every business day until each NOA shows accepted.
- Assign weekend coverage for admissions that start Wednesday through Friday.
- Review the log weekly. Any NOA accepted after day 5 gets a written cause.
This log also makes the exception request easier if a Medicare system issue ever causes a late NOA.
Quick answers
Is the NOA deadline 5 business days?
No. It’s 5 calendar days, starting the day after the start of care.
Does the penalty start on day 6?
No. Once the NOA is late, the reduction counts back to the start of care date.
Do I need an NOA for every 30-day period?
No. One NOA covers the whole admission until discharge.
Should I appeal a late NOA penalty?
No. The exception request on the claim is the required process.
Get a second set of eyes on your NOA process
Claim N Billing (CNB) is a family-owned billing team based in Irvine. We started by fixing billing failures in our own non-emergency medical transportation company, and we now handle billing for small healthcare practices across California. For home health agencies, that includes NOA tracking, claim submission, and working reduced payments. Learn more about our home health billing services.
If you’ve already been hit by a late NOA reduction, our denial management and appeals team can review the claim and exception options. Our payment posting and reconciliation process catches reductions on the remittance so they aren’t missed.
For Medicare policy shifts that affect California agencies, read Medicare changes affecting California practices. For the broader picture of how claims fail, see why claims get denied.
Request a free billing audit or book a call. You can also reach us at 949-969-4397 or info@claimnbilling.com.
This article describes Medicare billing requirements as published by CMS and its contractors. It isn’t legal or compliance advice. Confirm current requirements with your MAC and your compliance counsel before acting.