Your Patient Started Home Health Care. The Therapy Your Office Billed Can Be Taken Back.

On October 8, 2026, CMS released Change Request 14639, the annual update to the code lists it uses to enforce home health consolidated billing. The change itself is small: from January 1, 2027, two supply codes, A4453 and A4459, come off the non-routine supply list. The rule behind the list matters far more to a physician practice that runs its own therapy room or hands out supplies.

Under consolidated billing, while a Medicare patient is in a home health period of care, the home health agency that opened that period is the only one Medicare pays for outpatient therapy and the listed non-routine supplies. A claim for those services from anyone else is rejected or denied, even when the service was medically necessary and done well.

How a paid therapy claim turns into a takeback

Here is a hypothetical case. An orthopedic practice with a physical therapist on staff sees a Medicare patient a week after a hospital stay and books her into the practice's therapy room twice a week. Nobody asks whether she went home with a home health agency. She did, and the agency's nurse and therapist are also visiting her at home under a plan of care.

If the agency's claim reaches Medicare first, the practice's therapy lines are denied before payment. If the practice's claims arrive first, they may be paid, and when the agency's claim for that period is processed, Medicare's Common Working File tells the contractor to reject or deny them after payment. For professional claims, the contractor then recovers the money through its normal overpayment process. Either way the remittance shows group code CO with reason code 97 and remark code N390.

The CO group code means the denial shows as the practice's liability. CMS explains that consolidated billing is not an ABN situation: the patient can owe for the service only if she was told before the visit that she might have to pay, and the practice cannot shift that by having her sign a form saying she is not under home health care.

What the edit catches, and what it does not

On professional claims, Medicare enforces consolidated billing for outpatient therapy through a list of therapy HCPCS codes. Therapy performed by a physician is exempt: the edit is bypassed when the specialty code on the claim shows a physician specialty, such as orthopedic surgery, physical medicine and rehabilitation, family practice or a multispecialty group. Therapy billed with a physical or occupational therapist as the rendering provider is the line that gets edited.

Supplies work differently. Non-routine supplies on the list are edited when a supplier bills them, but CMS states that supplies incident to physician services are not subject to consolidated billing. Durable medical equipment is also exempt by law, so a practice that dispenses a walker or brace is not affected by this rule.

The edit applies across the whole home health period. If the patient is still under home health care, it covers every date from the day after the period starts through the period's end date.

Where to find out before the visit

CMS puts the duty to check on the practice. Before providing therapy or supplies, a provider or supplier needs to find out whether a home health period of care exists. CMS lists several sources:

• Ask the patient or their caregiver whether they are getting home health care under a plan of care. CMS calls the patient the first and best source.
• Check the HIPAA Eligibility Transaction System (HETS) response, which carries home health period information for professional billers. As a last resort, the A/B MAC's provider line can read it from the Common Working File.
• Look for a physician certification of home health care. Medicare systems display the date of certification (G0180) or recertification (G0179) billed for the patient, which can be the first sign that home health has started.
• Watch for remark code N88 on a paid claim. It means Medicare has an admission notice from a home health agency and the payment may be recouped later.

A short check for practices with an office therapy room

This is general information, not legal advice. A practice can start with these steps:

• Add one question to therapy intake and scheduling: is the patient receiving home health care now, or were they discharged from a hospital to home health in the last month?
• Make the HETS check part of every therapy booking for a Medicare patient, not only the first visit, since a home health period can start between visits.
• Confirm which rendering provider and specialty your system puts on therapy lines, so you know which visits the edit applies to.
• If a patient is under home health care and still wants therapy at your office, tell them before the visit that they may have to pay, and record that you did. Or contact the home health agency to ask whether it will arrange and pay for the service.
• Pull the last 90 days of Medicare remittances for reason code 97 with N390, and for N88 alerts on paid claims. Each one shows a patient whose home health status was missed at booking.

The question that saves the visit

Consolidated billing denials rarely look like a pattern, because they arrive one patient at a time and often months after the visit was paid. A practice that never asks the home health question at booking can lose the same therapy revenue again with every patient discharged from the hospital. If you want to know whether this is happening in your practice, a revenue review can look at one payer's denials and recoupments over the last 90 days and trace each one back to the step where it started.