Coverage for topical oxygen is only as strong as the chart behind it. Under proposed LCD DL33797, Medicare covers topical oxygen nationwide for a narrow group of patients with diabetic foot ulcers. For clinicians working at the bedside, the practical question is not just who qualifies. It is what you need to capture, on the visit itself, so the record holds up later.
This checklist is built for wound care clinicians, podiatrists, and nurses who chart on a phone or tablet.
Start with the four-week stall
The central test is a wound that has stalled: less than 50% healing after four weeks of optimized standard care. That number depends on consistent measurements taken the same way each visit.
- Capture a wound photo and measurement at every visit, not just when healing looks slow
- Record the baseline measurement date clearly so the four-week window is easy to verify
- Note the standard care being delivered, since the criterion refers to optimized care
A mobile workflow that pairs photo capture with measurement makes the trend visible instead of leaving it to memory. For more on that approach, see AI-powered wound imaging.
Confirm the patient profile
The LCD is specific about who fits. Before suggesting therapy, confirm and document each of these:
- Diabetes diagnosis on the problem list
- HbA1c under 12%, with the result and date recorded
- Adequate perfusion at the foot, with the assessment noted
If a value is missing or out of date, that gap is easier to catch at the visit than in a later audit.
Rule out the exclusions
Coverage fails if any red flag is present. Document that you looked for each one, not only the ones you found:
| Exclusion | What to record |
|---|---|
| Osteomyelitis | Presence or absence, and how it was assessed |
| Gangrene | Presence or absence at the wound site |
| Active infection | Clinical findings at this visit |
| Same-limb DVT | History or current status |
| Malignancy | Any relevant history at the wound |
A clear negative finding is evidence. A blank field is not.
Know what the billing side expects
One benefit bills as two codes: E0446 for the system and A4575 for the supply. Physician services fold into 99199 with no separate payment, and everything runs under DME jurisdiction. Your note should support those codes without the billing team having to chase details.
Why timing matters as much as content
A chart can contain every right element and still miss the mark if the stall was not flagged when it occurred. The four-week point is the moment to reassess, so build it into your routine rather than discovering it at the next review. Tools that track the healing curve and surface the sub-50% stall help you act on time. Our original post on the new CMS coverage walks through the coverage rules and how the platform ties them together.
Keep it fast
None of this helps if charting eats the visit. The goal is structured fields and a note that assembles as you go: measurements, HbA1c, perfusion, and exclusions captured once and reused. That is where a mobile-first approach pays off, especially for diabetic foot ulcer documentation in busy clinics, where the same data points come up at every visit.
A quick pre-order check
- Has the wound shown less than 50% reduction after four weeks of optimized care?
- Is diabetes confirmed and HbA1c under 12%?
- Is perfusion adequate and documented?
- Are all five exclusions addressed in the chart?
- Is the documentation dated and timed so a reviewer can follow it?
If every answer is yes, the clinical decision and the coverage decision line up. If not, you know exactly what to fix before the order goes out.
To see how a connected platform supports this workflow, visit the main website.