HCPCS code E0198 – Water pressure pad billing guide

Key takeaways

HCPCS code E0198 covers a non-powered water pressure pad that fits a standard mattress, billed by DMEPOS suppliers.

Medicare pays for it only when the medical record shows the patient meets the Group 1 criteria in LCD L33830.

Missing documentation of those criteria, or an invalid order, causes most E0198 denials.

Add KX only when every coverage criterion is met and documented, and use RR or NU to show rental or purchase.

Code the pad by its fill medium: E0197 is air, E0198 is water, E0185 is gel and E0199 is a dry pad.

HCPCS code E0198 is a water pad for a standard mattress

HCPCS code E0198 is the code for a water pressure pad for mattress, standard mattress length and width. The pad is filled with water and sits on top of a regular home mattress. It spreads body weight away from bony areas such as the sacrum, hips and heels.

The code belongs to CMS’s HCPCS Level II set, which CMS maintains and updates every year. Medicare treats E0198 as a Group 1 support surface. Coverage follows LCD L33830, which the DME Medicare Administrative Contractors (MACs) publish and can revise, so check it before each billing cycle.

What E0198 covers, and which pads need another code

E0198 covers a water-filled pad or overlay that lowers pressure where the body meets the mattress. The pad has to fit a standard mattress. Hospital-size, bariatric or other non-standard pads are not billed under E0198.

Covered under E0198:

• Water pressure pads of standard mattress length and width
• Water flotation overlays placed on top of an existing mattress
• Pads whose main job is pressure redistribution through water

Billed under a different code:

• Air pressure pads, which are billed under E0197
• Dry pressure pads, billed under E0199
• Gel or gel-like pressure pads, billed under E0185, and gel pressure mattresses, billed under E0196
• Powered alternating pressure overlays with a pump, such as E0181
• Non-standard or custom water overlays, which may need E1399 with a detailed item description
• Ordinary water beds bought for comfort rather than pressure management, which Medicare does not cover

The descriptor says “standard mattress length and width” for a reason. A product that doesn’t meet that size can’t be billed as E0198 without risking a descriptor mismatch denial.

Medicare covers E0198 when the patient meets Group 1 criteria

Medicare Part B covers E0198 when the patient meets one of three criteria in LCD L33830. Risk of a pressure ulcer on its own is not enough. The notes have to show which route applies.

1. Complete immobility: the patient can’t change body position without help.
2. Limited mobility: the patient can’t reposition enough to relieve pressure, and has at least one risk factor below.
3. Pressure ulcer: the patient has an ulcer of any stage on the trunk or pelvis, plus at least one risk factor below.

The four risk factors are:

• Impaired nutritional status
• Fecal or urinary incontinence
• Altered sensory perception
• Compromised circulatory status

The record should also hold a care plan set by the treating clinician or home care nurse. Prior authorization rules for DMEPOS change over time, so check the current CMS list when the order arrives.

The E0198 documentation file a reviewer expects to see

Most E0198 denials trace back to the supplier file rather than the product. A reviewer reads the order and the notes together, looking for one clear story. Strong medical billing compliance habits make that story easy to follow.

Before you submit, run this check:

• The notes name the Group 1 criterion, and the diagnosis codes back it up.
• A complete standard written order is on file.
• A face-to-face note is in the file if your MAC or the CMS required list calls for one.
• KX is on the line only if every criterion is met and documented.
• A signed ABN is on file if you expect a denial.
• Proof of delivery is signed, and the place of service matches the delivery address.

How to bill E0198 with the right modifiers and place of service

A supplier bills E0198 to the DME MAC on the CMS-1500 or its electronic version. The MAC’s automated edits check modifiers, units and place of service first. A claim that fails those edits is rejected before anyone reads the notes.

Units: E0198 is billed as one unit per pad. Never bill more than one unit for a single item. If two separate items go out on the same date, each gets its own line.

Place of service: home (POS 12) is the most common setting. A nursing facility (POS 32) can count as the patient’s home for DME. A skilled nursing facility (POS 31) can’t, so Part B won’t pay for the pad there.

E0197, E0198, E0199 or E0185: Code by what fills the pad

E0197, E0198, E0199 and E0185 share the same descriptor except for one word, the fill medium. The chart below shows how that one word decides the code. Picking the wrong one counts as upcoding or downcoding, whatever the intent.

The usual mistake is coding from the product name instead of the spec sheet. A dry pad goes to E0199, even if its cover looks or feels like gel. When a product mixes materials, code it by the medium that does the pressure work.

Not sure how a product is classified? The Pricing, Data Analysis and Coding (PDAC) contractor publishes product coding decisions. Keep the spec sheet in the supplier file either way.

When E1399 replaces E0198, and when it doesn’t

E1399 is the miscellaneous DME code. Use it only when no specific HCPCS Level II code describes the item. A water pad that matches the E0198 descriptor must be billed as E0198, because CMS requires the most specific code.

E1399 fits a narrow case, such as an oversized water pad for a bariatric bed. The claim then needs a detailed written description of the item. Expect more prepayment review, and add a letter explaining why a standard pad won’t work.

Never use E1399 to dodge a modifier or a documentation step. Payers compare E1399 claims with the item description, and a standard water pad will be recoded and denied.

Common E0198 denial reasons, and how to prevent each

Most E0198 denials fall into a short list of preventable causes. Good denial management catches them before the claim reaches the payer.

• Group 1 criteria not documented: the notes don’t say which criterion the patient meets. This is the leading cause, together with an invalid order.
• Invalid or incomplete order: the standard written order is missing a required element.
• No KX modifier: Medicare will deny the claim as not medically necessary, even when the file is complete.
• CMN problems, only if the active policy requires one: Group 1 surfaces currently need no CMN, so check the policy rather than habit.
• Diagnosis doesn’t match the criterion: for example, a heel ulcer cited for the ulcer route, which needs the trunk or pelvis.
• Wrong product type: billing E0198 for an air, gel or dry pad. Post-payment audits can recode the claim.
• Early replacement: replacing a pad early without documenting damage, loss or a change in the patient’s needs.
• Unsigned proof of delivery: a receipt without a signature is treated as an undelivered item.

How to appeal a denied E0198 claim in five levels

Medicare appeals run through five levels, and most E0198 disputes end at the first two. Start by reading the denial code reference on the remittance advice. It tells you whether the problem is technical, like a missing modifier, or about medical necessity.

1. Redetermination (level 1): file with the MAC within 120 days of receiving the denial. Send the missing documents, a short cover letter and the remittance advice. Decisions usually take about 60 days.
2. Reconsideration (level 2): file within 180 days of the redetermination decision. A Qualified Independent Contractor reviews the claim fresh, so attach any newer notes.
3. Administrative Law Judge (level 3): file within 60 days, once the amount in dispute meets the yearly CMS threshold.
4. Medicare Appeals Council (level 4): review of the judge’s decision, filed within 60 days.
5. Federal district court (level 5): open only after every earlier level, and above a set dollar amount.

For a medical necessity denial, ask the treating clinician for a short letter. It should explain which Group 1 criterion the patient meets, even if the notes didn’t use the LCD’s wording.

ICD-10 codes that can support an E0198 claim

Group 1 surfaces have no fixed list of covered diagnoses. The diagnosis on the claim has to support the criterion that your notes document. The codes below show how that works in practice.

Choose a specific code over an unspecified one where the record allows it. L89.311, a stage 1 ulcer of the right buttock, says far more than L89.90. Multiple sclerosis now needs a type-specific code, such as G35.D when the type isn’t documented.

E0198 reimbursement runs on the DMEPOS fee schedule

Medicare pays E0198 under the DMEPOS fee schedule, which CMS updates each January. Look up the current amounts in the CMS DMEPOS fee schedule. The figures change too often to quote here.

Key fee schedule facts for E0198:

• Fee schedule amounts are set by state, often with separate rural and non-rural rates.
• Items in the DMEPOS Competitive Bidding Program are paid at the bid rate inside a competitive bidding area.
• Commercial payers set their own rates, often as a percentage of Medicare or through supplier contracts.
• Medicaid rates vary by state. Some states follow Medicare, while others set their own amounts.

For quick code checks, the AAPC HCPCS lookup and PGM Billing’s HCPCS tool both draw on CMS data.

How Pabau helps E0198 claims go out complete

Many practices still keep the order in one folder, the notes in another and the claim in a third system. That split is how a claim leaves without the document a reviewer asks for later.

Pabau, the practice management platform we build, keeps orders, notes and claims on the same patient record. Its claims software for billers helps you submit and track claims from that record. Required claim fields are checked before the claim can be sent.

In the US, claims go out through Claim.MD, with eligibility checks and claim status tracking built in. Your team spends less time chasing paperwork and more time on the work in front of them.

Submit and track claims from one record

Pabau’s claims management software helps teams submit and track claims, with orders and notes kept on the patient record. See how it fits your billing workflow.

Book a demo

Conclusion

E0198 claims rarely fail because of the pad. They fail because the file doesn’t show which Group 1 criterion the patient meets. Fix that at intake, before the pad ships.

Ask for notes that name the criterion, a complete written order and a spec sheet that confirms water fill. Then add KX with confidence, or an ABN when you can’t. Book a demo to see how Pabau keeps orders, notes and claims together for your billing team.

Continue your research

Billing a pad with no air, water or gel fill? HCPCS code E0199 covers dry pressure pads for standard mattresses.

Is the pad filled with gel instead? HCPCS code E0185 explains the gel or gel-like pressure pad code.

Working with an air-filled pad? HCPCS code E0197 walks through air pressure pad billing.

Does the overlay use a pump? HCPCS code E0181 covers powered alternating pressure overlays.

Replacing a pad the patient already owns? HCPCS code A4640 covers replacement alternating pressure pads.

Frequently asked questions