When a home health claim does not pay, the first question is what kind of outcome it was. Returned, rejected and denied claims sound alike, but they lead to different next steps and different deadlines. This guide explains the three, the most common causes, and what an agency can check before submitting. It is general education about Original Medicare.
Returned, rejected and denied are different
Returned for correction. Medicare's manual calls a claim with missing or invalid required information unprocessable. It is sent back so the provider can correct it, and it does not count as a claim, is not a denial and has no appeal rights. The next step is to fix the error and submit again (Claims Processing Manual, chapter 1).
Rejected. Medicare Administrative Contractors use this for claims turned away for an administrative error. One contractor says rejected claims generally cannot be appealed, with limited exceptions, and that the provider must correct the error and submit a new claim (CGS: when to file or not file an appeal). The labels vary, so read the reason on your report rather than relying on the word alone.
Denied. A denial is an official payment determination. A denied claim is not corrected and resubmitted. If you disagree, you appeal. The first level is a redetermination, which must be requested within 120 calendar days of receiving the notice of the initial determination, and receipt is presumed to be 5 days after the date on the notice. A late request can be considered if you show good cause (42 CFR 405.942). Put the deadline on a calendar the day a denial arrives.
Why it matters: resubmitting a denied claim does not reopen the decision, and appealing a returned claim is the wrong step. Work out which one you have before anyone spends time on it.
Eligibility and coverage changes
A patient who joins a Medicare Advantage plan during care changes who the payer is. Under Medicare's manual, the period ends and is paid proportionally, and the plan becomes primary on its enrollment date. Billing Original Medicare for dates after that will not work. Another agency may also already hold the admission period. The manual says two agencies must never bill as primary for the same admission period, and a second agency's notice of admission is returned unless it reflects a transfer or a discharge and readmission (Claims Processing Manual, chapter 10).
Name or Medicare number mismatch
Required information that is complete but incorrect counts as invalid. A patient name, birth date or Medicare number that differs from Medicare's record, including a number that recently changed, can cause a return. Medicare's manual notes that an error in a notice of admission, such as a recently changed Medicare number, may not be returned right away, and that the wait can make the notice late. If the agency resubmits within two business days of the return and documents the dates, it can ask for an exception.
Claim data that does not match the assessment
Medicare needs the assessment to be accepted in its quality system before the claim arrives. If it finds no matching assessment, the claim is returned. Check that the assessment finished processing and was not inactivated, that it is a type used for payment, and that the assessment date on the claim matches it. The manual also says the principal diagnosis must be specific enough for payment grouping, and a claim can be returned if it is not.
A practitioner who is not enrolled in Medicare
The ordering or certifying physician, nurse practitioner, physician assistant or clinical nurse specialist must be identified by legal name and National Provider Identifier, and be enrolled in Medicare in an approved status or have validly opted out (42 CFR 424.507). An enrollment problem on the practitioner's side can hold up the agency's claim.
Dates outside the period
The first 30-day period starts on the start of care date, later periods follow one after another, and periods cannot overlap. Services dated before the start of care or past the end of the period belong somewhere else. Count the days against the actual start of care before you send.
Missing or late notice of admission
The notice of admission must be accepted within 5 calendar days after the start of care. A late one reduces payment by one thirtieth per day until it is accepted, and those days cannot be billed to the patient (42 CFR 484.205(j)).
Diagnosis coding
The principal diagnosis must be a full, valid code reported under the official coding guidelines. The manual says diagnoses used for payment grouping come from the claim, not the assessment, so the two are not always expected to match. Even so, a code that is incomplete or leaves grouping unable to assign a payment category can send the claim back.
Prevention steps before submission
- Confirm the payer on the day of the first visit and again before each claim. Note any change in enrollment.
- File the notice of admission within 5 calendar days, and keep proof that it was accepted.
- Confirm the practitioner's enrollment status and that the name and National Provider Identifier match.
- Confirm the assessment was accepted and is the one the claim points to.
- Check patient name, birth date and Medicare number against what Medicare has on file.
- Check that all dates sit inside the 30-day period and that the plan of care and orders are signed.
- Review diagnosis codes for completeness.
- When a claim comes back, read the exact reason, fix it, and track the 120-day appeal clock for denials.
A billing company can run these checks before every submission and follow each response, so errors are caught while correction is still simple. The agency still has to supply accurate records.
Related guides
See Medicare home health billing for how periods, certification and deadlines fit together, and choosing a home health billing company if you are weighing outside help.