Peridex CAPD Filter Set | CMS Coverage Update

Summary: The Centers for Medicare & Medicaid Services modified its coverage policy for the Peridex CAPD Filter Set, effective May 15, 2026. Here's what billing teams need to know before that date.

This update from the Centers for Medicare & Medicaid Services touches a narrow but operationally important corner of durable medical equipment billing — continuous ambulatory peritoneal dialysis (CAPD) supplies. The Peridex CAPD Filter Set coverage policy does not carry a formal policy code in CMS's system, which means your team needs to rely on the policy title and applicable HCPCS codes to correctly route these claims. The policy does not list specific procedure codes in the available data, so you'll need to verify current HCPCS assignments with your Medicare Administrative Contractor before the effective date of May 15, 2026.

Quick-Reference Table

CMS Peridex CAPD Filter Set Coverage Criteria and Medical Necessity Requirements 2026

The CMS Peridex CAPD filter set coverage policy applies to supplies used in continuous ambulatory peritoneal dialysis — a home-based dialysis modality where patients perform dialysis manually throughout the day using gravity-fed fluid exchanges. The Peridex filter set is a bacterial retentive filter that attaches to the dialysis tubing to reduce infection risk during exchanges. That clinical function is the basis for medical necessity.

CMS's general framework for CAPD supply coverage requires that the patient have end-stage renal disease (ESRD) and be actively performing peritoneal dialysis at home. Medical necessity for the filter set specifically rests on physician documentation showing the patient's dialysis regimen requires bacterial filtration — either by protocol or individual patient risk profile. Without that documentation, a claim for this supply is exposed to denial on medical necessity grounds.

Prior authorization is not typically required for CAPD supplies under Medicare's DME benefit, but your MAC may impose documentation requirements before processing claims. Check with your regional MAC now, before May 15, 2026, to confirm whether this modification changes any local documentation expectations. Some MACs have issued local coverage determinations (LCDs) that layer on top of CMS's national guidance for peritoneal dialysis supplies.

The reimbursement basis for CAPD filter sets falls under the DME fee schedule. Any modification to the coverage policy can shift how claims are reviewed at the MAC level, which directly affects your reimbursement timeline and denial rate.

CMS Peridex CAPD Filter Set Exclusions and Non-Covered Indications

The available policy data does not specify explicit exclusions for the Peridex CAPD Filter Set under this modification. However, standard CMS rules for DME supply coverage apply.

CMS does not cover CAPD supplies — including filter sets — for patients who are not actively performing peritoneal dialysis at home. If a patient has transitioned to in-center hemodialysis, claims for ongoing CAPD filter supplies will not meet medical necessity and will face denial. Document the patient's current dialysis modality clearly on every claim cycle.

Supplies billed in excess of the established utilization guidelines — typically based on the number of exchanges per day — are also at risk for denial or post-payment audit. Your billing team should confirm the allowed quantity per claim period directly with your MAC, since this modification may have adjusted those parameters.

Coverage Indications at a Glance

The policy data provided does not include indication-level criteria with specific coverage status designations. The table below reflects what can be reasonably derived from the policy title, CMS's general CAPD supply framework, and standard DME billing rules. Verify each row against your MAC's current LCD before billing after May 15, 2026.

CMS CAPD Filter Set Billing Guidelines and Action Items 2026

This is where the modification actually affects your day-to-day Peridex CAPD filter set billing. The policy data does not include line-by-line changes, so these action items are built around the known CMS framework for CAPD supplies and the operational steps you need to take before May 15, 2026.

CPT, HCPCS, and ICD-10 Codes for Peridex CAPD Filter Set Under This Policy

The policy data provided for this CMS modification does not list specific CPT, HCPCS, or ICD-10 codes. This is not unusual for CAPD supply policies, where code assignments are often managed at the MAC level rather than through a national code-specific coverage determination.

Do not use codes from third-party sources or general CAPD billing guides without confirming they still apply under this modification. The Peridex CAPD filter set is a specific product, and its HCPCS code assignment should be verified directly.

How to Find the Correct Codes

• Contact your MAC's provider services line and ask for the current HCPCS code for the Peridex CAPD filter set. Bring the policy title and the effective date of May 15, 2026 to the call.
• Check the SADMERC/PDAC product classification list. The Pricing, Data Analysis and Coding (PDAC) contractor maintains HCPCS code assignments for DME products. Search the Peridex filter set by product name or manufacturer number.
• Review your MAC's LCD for peritoneal dialysis supplies. If your MAC has issued a local coverage determination for CAPD supplies, that document will specify covered HCPCS codes, ICD-10 diagnosis codes required for coverage, and documentation standards.

Expected ICD-10 Diagnosis Code Context

While no ICD-10 codes are listed in this policy's data, CAPD supply claims routinely require an ESRD diagnosis code to establish medical necessity. Your billing team should confirm the accepted diagnosis codes with your MAC and ensure they are current on every claim.