The two homebound criteria CMS auditors actually look for.

An agency we spoke with recently lost a clean-looking Medicare claim. The patient had a walker. The discharge summary said so. The Plan of Care said so. CMS still denied the episode. The reason: nothing in the chart said leaving home required a considerable and taxing effort. Walker on the chart was not enough.

Homebound is one of the easiest Medicare requirements to think you have covered and one of the easiest to miss. The Medicare Benefit Policy Manual is specific: a patient is homebound only when both of two criteria are documented. Most charts hit the first. The second is where claims get denied.

Criterion 1, the one most charts cover

Criterion 1 says the patient either (a) needs the help of another person, an assistive device (cane, walker, wheelchair, crutches, special bed, prosthetic), or special transportation to leave home, or (b) has a medical condition that makes leaving home contraindicated (post-op weight-bearing precautions, oxygen-dependent without a portable concentrator, severe agoraphobia, immunocompromised after transplant).

This is the criterion most discharge summaries do well on. A line that reads “ambulates with rolling walker” or “continuous oxygen, no portable supply” satisfies it. So does a post-op order page that lists weight-bearing precautions.

Criterion 2, where the documentation gap lives

Criterion 2 says both of the following must be true: leaving home requires a considerable and taxing effort, AND absences from home are infrequent, or of relatively short duration, or primarily for medical care, adult day care, or religious services.

This is the one most physicians do not write. Discharge summaries focus on what was wrong and what was done about it. They rarely describe how exhausting it is for the patient to leave the house. Without that language in the chart, an auditor cannot confirm criterion 2 even if the patient obviously qualifies in person.

Where homebound documentation should live

In order of preference: the Plan of Care (CMS-485) has a Homebound Reason box on the form itself. The F2F encounter document, when written well, includes a homebound rationale narrative. A discharge summary or H&P signed by the certifying physician can also carry the language if the document is being used as the F2F attestation. The further you get from the CMS-485 and F2F, the harder it becomes to defend in a record review.

The phrases auditors actually look for

After reviewing dozens of CMS audit determinations, a small set of phrases shows up repeatedly as the language that satisfies criterion 2. “Leaving home requires a considerable and taxing effort” is the safest, almost verbatim from the Benefit Policy Manual. “Rarely leaves home,” “leaves home only for medical appointments,” “depends on family for transport to clinic visits,” and “absences are short and infrequent” all carry weight if they appear alongside the assistive-device or contraindication language from criterion 1.

What does not satisfy criterion 2: a diagnosis (CHF, COPD, Parkinson’s), a frailty score, or a mention that the patient is elderly. Those are necessary context, not the language auditors need.

How we think about it at IntakeFlow

We parse every referral packet against both criteria independently. If criterion 1 is supported and criterion 2 is not, we tell the coordinator which half is missing, with the verbatim sentence from the chart that did or did not satisfy it. The coordinator can call the discharge planner before SOC, ask for a one-line addendum on the F2F, and avoid the denial downstream.

The coordinator still owns the call to accept or decline. We are not making the homebound determination. We are showing the coordinator what an auditor will see when they pull the record twelve months from now.