Medicare Part B Reimbursement for SNFs: A Plain Guide
Eric HansenFounder, Burst BillingJuly 13, 20268 min readOne dressing. Two residents. The rule changes with the stay.
Two residents. Same wound. Same box of dressings off the same shelf.
One is billable to Medicare Part B. The other is bundled into a covered Part A stay, and billing it separately would be an error.
Same box. Two rules.
The dressing is the easy part. What decides the bill is everything around it. The resident's status that day. The benefit category. The order. The chart.
That's why Part B feels hard in a skilled nursing facility. The supply is simple. The context is the test.
Learn one question and half of this gets simpler. I'll hand it to you in a minute.
Two things before we start.
- This is a teaching piece, not a billing manual. Read it once, then give your team the one question at the end.
- Send it to whoever owns billing and whoever owns compliance. Part B lives right between them.
Why Part B billing feels like a trap in skilled nursing
Here's why Part B trips up sharp people.
The words all sound related. They aren't interchangeable.
Part A. Part B. Consolidated billing. DMEPOS. POS. DME.
Six terms. They rhyme in a meeting. They mean six different operational decisions.
You don't need to memorize them. You need to know which question to ask first, and when to stop and pull documentation before anyone says the word "bill."
Simple beats clever when an auditor reads it back.
Start with the resident's Part A status
Here's the one question I promised.
"Was the resident in a covered Part A stay on the date of service?"
Ask that first, every time. It sets the lane.
In a covered Part A stay, consolidated billing puts billing responsibility on the SNF for most services the resident receives, except for specifically excluded services. CMS lays this out in its consolidated billing guidance. Bill one of those bundled items separately, and you've made an error.
Outside a covered Part A stay, the pathway can be different. That's where a controlled review earns its keep.
The same rule reaches well beyond SNFs. In an October 2025 audit, the HHS Office of Inspector General found Medicare improperly paid suppliers $22.7 million over seven years for DMEPOS provided to enrollees during inpatient stays. None of it should have been paid, because in that setting the items had to come through the facility, not a separate supplier bill. Different setting, same rule: status decides who's allowed to bill.
Same supply. Different stay. Different question.
Start every supply question with the stay.
What decides whether a SNF supply is billable to Part B
Five things decide whether a supply is billable. Learn these and you understand most of Part B in a SNF.
| What changes the answer | Example | Why it matters |
|---|---|---|
| Resident status on the date of service | The same dressing, used in a covered Part A stay vs outside one | A covered Part A stay bundles most services into consolidated billing |
| Benefit category | DME vs a surgical dressing vs a prosthetic device | CMS sorts these into different categories, and each carries its own coverage rules |
| A qualified practitioner's order | The supply was used, but no order is on file | Coverage ties to the order and to medical necessity |
| Documentation | The chart doesn't show the item was provided or used | A claim has to be supported to be defensible |
| Prior billing arrangement | An outside supplier already billed the item | Billing it a second time is a compliance problem |
Five variables decide it. The supply is only the thing they're deciding about.
This is also why the broad statements are dangerous. "All DME is billable." "DME is always excluded." Both skip the five variables, and both will eventually be wrong in your building. See our DME billing and reimbursement primer for how the categories separate.
What a compliance-first Part B review looks like
A Part B process shouldn't live in one person's inbox.
It should leave a record. What got reviewed. What got excluded. What's pending. What got billed. What got paid or denied.
That record protects the facility as much as it collects revenue. It's also the difference between a facility that quietly misses this revenue and one that runs a workflow to catch it.
And it has to be allowed to say no. If the documentation isn't there, or coverage is unclear, the claim waits. Force it, and a reimbursement can turn into a repayment.
"People ask me if a supply is billable. My first answer is a question back: was the resident in a Part A stay that day? Everything starts there."
Conservative exclusions aren't lost money. They're the reason your billed claims hold up when someone checks. For facilities building this discipline, start with SNF Part B billing compliance and connect it with Medicare audit defense so decisions leave a trail.
One habit, not a manual
You don't need the manual. You need one habit.
Start every supply question with the resident's status. Then walk the five variables. If they line up, review the claim. If one is missing, it waits.
Teach your team that one question. The rest turns into a checklist.
Your residents get the same care either way. The billing just has to know which stay they were in.
Start with the stay.
Compliance note
This article is for general educational purposes only. It doesn't replace facility-specific billing, compliance, legal, or payer guidance. SNFs should verify coverage, coding, documentation, and submission decisions against applicable CMS guidance, payer rules, and their own compliance policies.
References
- CMS, Skilled Nursing Facility (SNF) Consolidated Billing
- CMS, Medicare Provider Compliance Tips: Surgical Dressings (57.6% improper payment rate, 2024 reporting period)
- HHS OIG, Medicare Improperly Paid Suppliers $22.7 Million Over 7 Years for DMEPOS Provided to Enrollees During Inpatient Stays (OAS-24-09-005, 2025)
- CMS, Healthcare Common Procedure Coding System (HCPCS)
- CMS, Medicare Coverage Database
Related
Written by
Eric Hansen
Founder, Burst Billing
Eric Hansen is the founder of Burst Billing. He has spent over a decade helping skilled nursing facilities recover missed Medicare Part B supply reimbursement through cleaner documentation, tighter vendor workflows, and risk-free billing reviews.
More from Eric →Frequently asked questions
- It's payment for certain supplies and services a resident receives that fall under Medicare Part B rather than the Part A per-diem, typically when the resident isn't in a covered Part A stay, or for items specifically excluded from consolidated billing. Whether a given item is billable depends on the resident's status, the benefit category, a qualified practitioner's order and medical necessity, and documentation. Verify specifics against current CMS guidance and your payer rules.
- During a covered Part A stay, consolidated billing puts billing responsibility on the SNF for most services the resident receives, except for specifically excluded services. That means many items can't be billed separately to Part B while the resident is in that stay. The resident's status on the date of service is the first thing to confirm, because it sets which billing pathway applies.
- No. Part B isn't a simple yes or no bucket. Coverage ties to benefit categories, medical necessity, documentation, code selection, and payer rules. The same supply can be billable for one resident and bundled for another depending on status and context. Each item should be reviewed against the applicable category, resident status, documentation, and coverage policy.
- CMS separates DMEPOS into several benefit categories, including durable medical equipment (DME), prosthetics and orthotics, prosthetic devices, surgical dressings, therapeutic shoes, and others. Each category has its own coverage and documentation rules, which is why "it's DME" doesn't answer the billing question by itself. Confirm the correct category and its rules against current CMS guidance.
- Generally: a qualified practitioner's order, evidence of medical necessity, the resident's status on the date of service, the correct code and coverage policy, and proof the item was provided or used. If any of those depends on someone's memory instead of a visible record, the process is too weak to support the claim. Verify requirements against current CMS guidance and your payer rules.
- Yes, directly. A covered Part A stay bundles most services into consolidated billing, so an item that would be billable to Part B outside that stay may not be billable during it. This is why the resident's status on the date of service is the first question in any Part B review.
- No. The stronger approach is controlled and documented. Review each opportunity against status, category, documentation, and coverage, keep a record of every decision, and let the process exclude anything it can't support. Compliance-first billing protects the facility and still captures the claims the record supports.
- CMS requires a new order every 3 months for each dressing used. Documentation is the leading reason surgical dressing claims are found improper, so keeping the order current and in the record matters as much as the dressing itself. Verify against current CMS guidance and the applicable local coverage determination.
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