What Does a DME Billing Company Actually Do?

If you’re a DME supplier struggling to manage your billing affairs and weighing whether to outsource your billing, you’ve probably found the top 10 DME medical billing companies roundups online. But the real question that most of you skip is much simpler and it is: what does a DME billing company actually do? What are the day-to-day activities that make outsourcing worth considering in the first place?

A DME billing company ideally manages the revenue cycle work needed to get a DME provider paid for covered equipment and supplies offered to patients. Depending on the scope of service, the company deals with insurance eligibility verification, prior authorization, order and documentation review, HCPCS coding, claim submission, denial management, accounts receivable follow-up, payment posting, and even customized reporting.

What Happens Before DME Is Delivered

A DME billing company’s work doesn’t start when a claim gets filed. It starts the moment an order comes in.

Order intake — It is an initial step where the team collects patient demographics, insurance information, and even the physician’s order. They further check that nothing is missing. A wrong policy number or an incomplete order causes problems later, so catching it early matters.

Eligibility and benefits verification — Before anything ships, the billing team confirms the patient’s plan actually covers the equipment being ordered. This includes checking Medicare, Medicaid, or commercial benefits, identifying any secondary coverage, and, where relevant, reviewing what the patient will owe out of pocket deductibles, coinsurance, or copayments. Skipping this step is how suppliers end up holding equipment nobody will pay for.

Prior authorization — For DMEPOS items on Medicare’s Required Prior Authorization List, which currently includes certain power mobility devices, select orthoses, pressure-reducing support surfaces, and other designated items, the supplier must obtain a prior authorization decision before furnishing the item, in line with CMS rules. A billing company tracks which items need this, submits the request, and follows it through to a decision.

Written Orders and Documentation

DME billing depends on paperwork in a way most other medical billing doesn’t. This is also where a lot of denials start and it’s an area where the rules changed more than suppliers sometimes realize.

Certificates of Medical Necessity are gone — CMS three years back discontinued Certificates of Medical Necessity (CMNs) and DME Information Forms (DIFs) for claims with dates of service on or after January 1, 2023. If your billing process still submits these forms, the claim gets rejected. What replaced them is the Standard Written Order (SWO); a signed order from the treating practitioner along with supporting documentation in the patient’s medical record that shows why the equipment is medically necessary. For certain items, a written order prior to delivery (WOPD) and a face-to-face encounter note are also required.

The billing team’s role here is specific. It isn’t to create clinical documentation only a prescriber can establish medical necessity. What a billing company does is review the order and supporting records for completeness, check that they meet the applicable coverage rules, and follow up with the prescriber’s office when something is missing or incomplete.

Coding and modifiers — Every item needs the correct HCPCS Level II code. DME billing also depends heavily on modifier flags that show whether an item is rented or purchased, new or replacement, and whether the file has documentation supporting medical necessity. A wrong modifier is one of the most common, and most avoidable, reasons a claim comes back unpaid.

Capped rental tracking — Much of DME billing runs on a monthly rental model instead of a one-time purchase. Medicare here generally pays for most all covered capped-rental items for up to 13 months of continuous use. Once it is done, the ownership here gets transferred to the patient. This is particularly where professionals from a DME billing company can track exactly which rental month an item is in, as incorrect rental sequencing, modifiers, or even billing dates can lead to denials, payment delays, and an inaccurate rental history that’s hard to untangle later.

Claims Submission and Denial Management

Once the documentation is in order, the billing company submits the claim, but the work doesn’t stop there.

Claim scrubbing — This starts way before a claim ever reaches the payer; it’s checked against payer-specific edits and coding rules. This step, often called claim scrubbing, catches simple errors that would otherwise cause an automatic rejection.

Clean claim submission — The claim goes to Medicare, Medicaid, or the commercial payer only after it passes that review, not the other way around.

Rejected vs. denied claims — These aren’t the same thing, and a good billing company treats them differently. A rejected claim usually failed way before the payer even reviewed it: a coding error or missing field.

Denial management — When a claim is denied, the billing team identifies the reason and fixes what’s needed. They further resubmit or appeal. Just as important, they track patterns; if the same issue keeps causing denials, that points to a process fix, not just a one-off correction.

Accounts Receivable and Payment Posting

Accounts receivable follow-up — Unpaid and aging claims need active follow-up, not a “wait and see” approach. This is often where the most revenue quietly leaks out of a DME supplier’s business, not from claims that get denied outright, but from ones that just sit unresolved.

Payment posting and reporting — Once payment arrives, it’s posted and reconciled against what was billed. A supplier working with a billing company should also get regular reporting, not just a monthly total, but visibility into where claims stand and where revenue is at risk.

Common Mistakes That Slow Down DME Reimbursement

A few issues show up again and again across DME billing operations, whether the work is done in-house or outsourced:

• Working from an outdated prior authorization list. CMS updates the Required Prior Authorization List more than once a year. A team checking against last year’s list can miss a code that now requires approval.
• Submitting CMNs or DIFs out of habit. Since these forms are no longer required for current dates of service, including them doesn’t just waste time. It can cause the claim to be rejected outright.
• Missing the rental-to-purchase conversion month. Billing a capped rental item under the wrong month resets tracking and delays payment, even when every other part of the claim is correct.
• Incomplete written orders. A Standard Written Order missing a required element, the item description, quantity, or practitioner signature, for example, is one of the simplest, most preventable reasons a claim gets held up.

Most of these aren’t complicated fixes on their own. However, it is all about catching all of them, consistently, across every claim, which is exactly the kind of repetitive, detail-heavy work a dedicated billing team is built around.

Why Suppliers Outsource This Instead of Doing It In-House

Every step above takes specific, current knowledge: HCPCS coding rules, payer-specific documentation standards, prior authorization requirements, and Medicare policy changes like the CMN/DIF elimination above. All of it changes regularly. Keeping an in-house team current on all of it, on top of running a DME business, is a real cost even when it doesn’t show up as a line item the way a billing partner’s fee does.

That’s why outsourcing makes sense for many DME suppliers. It isn’t simply about handing off paperwork. It’s about putting a complex, constantly changing revenue cycle workload in the hands of a team whose full-time job is tracking it.

There’s also a staffing angle that’s easy to underestimate. Billing roles in this space have real turnover, and training a new hire on HCPCS coding, payer-specific rules, and DME specific documentation takes time, and that’s time during which claims can slip. A billing company absorbs that turnover risk instead of passing it on to the supplier. And because a dedicated billing partner works across many suppliers, it typically has more visibility into emerging denial patterns and payer policy shifts than a single in-house team would, simply from seeing more claims across more payers.

None of this means every supplier needs to outsource. Some suppliers have the volume and internal expertise to manage billing well in-house, and that can be the right call. The decision usually comes down to whether the cost of building and maintaining that expertise internally is lower or higher than the cost of a billing partner, and whether the team’s time is better spent on billing or on the equipment and patient-facing side of the business.

This is exactly the work SunKnowledge’s DME billing team handles for DME suppliers every day at a cost effective rate of $7 an hour. From the first eligibility check through final payment posting, we do it all, so your team can stay focused on equipment and patient care instead of chasing signed orders and denial codes. If you’re weighing whether outsourcing makes sense for your business, talk to us about what that would look like.

For a deeper walkthrough of the claims process itself, see our guide on how to bill DME claims. And if prior authorization is a specific pain point, we’ve also covered what changed with DME prior authorization in 2026.

Frequently Asked Questions