DME Capped Rental Billing: How to Track the 13 Months Without Losing Payments

Most capped rental problems I’ve cleaned up didn’t start with a bad claim. They started with a bad count.

Someone billed month 4 with KI. Someone restarted a rental after a three-week hospital stay. Nobody noticed the patient already had a CPAP from another supplier. The claim went out clean, got paid, and came back months later as an overpayment letter.

Here’s how capped rental billing works under Medicare, where the count usually slips, and the checks we run before a rental claim goes out.

What counts as a capped rental item

Capped rental is the Medicare payment category for equipment that’s rented month to month up to a limit and then belongs to the patient. Hospital beds, CPAP and bi-level devices, wheelchairs and patient lifts are the ones most suppliers deal with.

The rules sit in 42 CFR 414.229 and Chapter 20 of the Medicare Claims Processing Manual. The short version:

• Medicare pays rent for no more than 13 months of continuous use.
• Months 1 to 3 pay 10% of the purchase fee. Months 4 to 13 pay 7.5%.
• Standard power wheelchairs use 15% for months 1 to 3 and 6% after that.
• After the 13th paid month, the patient owns the item. From then on Medicare pays for needed repairs, not rent.

Oxygen isn’t in this category. It runs on its own 36-month rule, and we’ll get to it later in this series.

The month modifiers

Every capped rental line carries RR plus one month modifier:

Modifier	Rental month
KH	Month 1
KI	Months 2 and 3
KJ	Months 4 through 13

Then you add whatever the policy asks for, like KX on CPAP, or GA, GY or GZ when liability is in question.

The month modifier has to match where the patient really is in the rental. Your software’s count doesn’t matter if it’s wrong. If you take over a patient in month 6, your first claim is KJ. Bill KH there and you’re telling the DME MAC a new period started. It didn’t, and that line will deny now or get recouped later.

Example: a hospital bed that changes suppliers

A patient starts renting a semi-electric hospital bed (E0260) from Supplier A in January. Supplier A bills January with KH, February and March with KI, and April with KJ. In May the patient comes to you because Supplier A stopped servicing their area.

What you need to know before the first claim:

1. The rental doesn’t restart. Noridian says it plainly: a change in suppliers during the 13 months doesn’t begin a new period. You pick up at month 5.
2. You get what’s left. That’s months 5 through 13, nine payments, all KJ.
3. You transfer title. Whoever furnishes the bed in month 13 transfers ownership the day after that month ends. Here, that’s you.
4. A move doesn’t reset it either. If the patient had moved across the state line instead, it’s still one rental.

The exception is competitive bidding. When a program round is in effect and a patient in a bid area switches from a non-contract supplier to a contract supplier, the manual allows a new 13-month period. Check the program status for the patient’s ZIP code before you count on that.

At intake, ask the patient straight out whether they’ve had this kind of equipment before and who supplied it. Then run same-or-similar. Five minutes at intake beats a denial three months later.

Break in billing vs. break in need

This is where most of our rental cleanup work comes from. The two look alike on a calendar and bill completely differently.

Break in billing

The patient still needs the equipment, but you can’t bill the DME MAC for a while. Usually that’s an inpatient stay, a SNF stay, hospice or a move into a Medicare Advantage plan.

• If home use picks back up inside the same 30-day rental month, nothing changes.
• If the break runs past the end of that rental month, stop billing. When use resumes at home, set a new date of service and continue the same series.
• Unpaid months don’t count toward the 13.
• Put a BIB narrative on the claim line so the reviewer knows why there’s a gap.

Say month 7 starts March 10 and gets paid. The patient is admitted March 20 and comes home April 25. You don’t bill the rental month that would have started April 9. Your new date of service is April 25, billed as month 8 with KJ. Not a new KH.

Break in need

Here the need actually stopped. The bed came back, or the doctor said the patient doesn’t need it anymore.

A new 13-month period only starts if the gap lasted more than 60 consecutive days plus the days left in the rental month when use stopped. That’s the 30-day rental month, not the calendar month. Shorter than that, you resume the old series.

If it’s longer, you’ll need:

• A new order from the treating practitioner.
• Medical records showing current need, including a new face-to-face visit.
• A statement explaining why use was interrupted.
• A BIN or BIS narrative on the first claim, billed with KH.

Narratives go in loop 2400, NTE02 (with NTE01 = ADD) on the 837P, or item 19 on a paper claim. If it still denies, appeal with the full file and say outright in the redetermination that there was a break in need.

One thing I tell every new biller: the DME MAC assumes need was continuous unless your paperwork clearly says otherwise. “Patient stopped using it” isn’t a break in need. A dated pickup ticket and a physician note about the change in condition is.

Swaps and add-ons

Swap a patient into different but similar equipment and the rental keeps counting against the original 13 months. It only restarts if the patient’s condition has substantially changed and the record supports the new item. If the 13 months are already used up, there’s no new rent on the substitute without that change.

Adding something to existing equipment because need changed works differently. The original item keeps its count, and the add-on starts its own 13 months.

Month 13 and after

Once the 13th rental pays, stop billing rent. You’re not done with the patient, though.

• Transfer title and keep proof that you did.
• Bill repairs correctly. On patient-owned equipment, repairs not covered by warranty are payable. Put RB on the replacement part codes only. Noridian is explicit that RB doesn’t go on the labor line.
• Document the repair. Note what broke, when, and why it needs fixing.

Complex rehab power wheelchairs have their own wrinkle. You have to offer the patient a purchase option in the first month. If they buy, the claim carries NU (or UE), KH and BP. If they don’t, bill it as a rental.

CPAP: where KX fits

CPAP is a capped rental item, but the PAP policy article adds a layer on top.

• Months 1 to 3: add KX only if the initial coverage criteria in LCD L33718 are met.
• Month 4 onward: KX needs both the initial and continued coverage criteria. That means a face-to-face re-evaluation between day 31 and day 91 showing improved symptoms. It also means adherence of 4 or more hours a night on 70% of nights in any 30 consecutive days during the first three months, reviewed by the treating practitioner.

If you don’t have that by the month 4 claim, you can send it without KX or hold it. If the re-evaluation happened after day 91 and the patient qualifies, KX only goes on dates of service after that visit.

Our pre-billing checklist

Before any capped rental claim leaves, we check:

1. Same-or-similar history, plus what the patient told us at intake.
2. The rental start date and month number, stored on the patient account and not just in claim history.
3. That the month modifier matches the real month.
4. Any gap, written up as a break in billing or a break in need, with the days counted.
5. The BIB, BIN or BIS narrative wherever it applies.
6. For CPAP, the month 4 KX support from the policy article.
7. A flag on month 13 so rent stops and title transfers on time.
8. Monthly remit reconciliation.

That last one matters more than it looks. When one month denies and nobody catches it, every modifier after it is off by one.

How Salyx RCM helps

Knowing these rules is the easy part. Tracking them patient by patient, month after month, is the actual job, and it’s what our DME billing services team does every day. For device-specific rules, see our CPAP billing page. If some terms here are new to your staff, keep our medical billing glossary handy. Our DME case studies show how other suppliers worked through rental backlogs.

Not sure your rental counts are right?
Request a free billing audit. We’ll review your open capped rentals, flag modifier and break-in-need errors, and tell you which ones to fix first.

Sources

1. eCFR, 42 CFR 414.229, Other durable medical equipment: capped rental items. https://www.ecfr.gov/current/title-42/chapter-IV/subchapter-B/part-414/subpart-D/section-414.229
2. CMS, Medicare Claims Processing Manual, Pub. 100-04, Chapter 20, sections 30.5 and 40.6. https://www.cms.gov/regulations-and-guidance/guidance/manuals/downloads/clm104c20.pdf
3. CMS, Medicare Claims Processing Manual, Pub. 100-04, Chapter 36, section 40.6.1. https://www.cms.gov/regulations-and-guidance/guidance/manuals/downloads/clm104c36.pdf
4. Noridian JA DME, Capped Rental Items. https://med.noridianmedicare.com/web/jadme/topics/payment-categories/capped-rental
5. Noridian JD DME, Break in Need or Service and Break in Billing. https://med.noridianmedicare.com/web/jddme/topics/documentation/break-in-need-or-service-and-break-in-billing
6. Noridian JD DME, New Capped Rental Period. https://med.noridianmedicare.com/web/jddme/claims-appeals/billing-situations/new-capped-rental-period
7. Noridian JA DME, Modifier RB. https://med.noridianmedicare.com/web/jadme/topics/modifiers/rb
8. CMS, LCD L33718, Positive Airway Pressure (PAP) Devices for the Treatment of Obstructive Sleep Apnea. https://www.cms.gov/medicare-coverage-database/view/lcd.aspx?lcdid=33718
9. CMS, Policy Article A52467, PAP Devices for the Treatment of Obstructive Sleep Apnea. https://www.cms.gov/medicare-coverage-database/view/article.aspx?articleid=52467