HCPCS Code C1826: Implantable neurostimulator generator billing guide
HCPCS Code C1826 is a billable device code for a generator, neurostimulator (implantable). The descriptor includes closed feedback loop leads and all implantable components, with a rechargeable battery and charging system. Medicare pays for it only under the Outpatient Prospective Payment System (OPPS) or the Ambulatory Surgical Center (ASC) payment system. In addition, payment depends […]
HCPCS Code C1820: Implantable rechargeable neurostimulator
HCPCS code C1820 describes a Generator, neurostimulator (implantable), with rechargeable battery and charging system. It is a Level II HCPCS C-code billed only in hospital outpatient department (HOPD) and ambulatory surgical center (ASC) settings. In practice, most claim denials for this device code come from billing it in the wrong setting or confusing it with […]
HCPCS Code C1874: Stent, coated/covered, with delivery system
HCPCS Code C1874 is a Level II device code for a coated or covered stent supplied with its delivery system. It looks simple at first. In practice, however, the billing rules around it are not. This reference covers the official descriptor, code attributes, 2026 fee schedule data, clinical use cases, billing guidelines, coverage criteria, and […]
HCPCS code A4640: Alternating pressure pad billing guide
HCPCS code A4640 covers a replacement pad for a medically necessary, patient-owned alternating pressure pad. It’s a Level II supply code, and it covers only the pad itself, never the pump or the full system. That narrow scope is where claims go wrong most often. The descriptor requires the primary device to be patient-owned, not […]
HCPCS Code C1816: Receiver/transmitter, neurostimulator (implantable)
Most claim denials for implantable device codes come down to one problem: the billing team misclassifies the component. HCPCS Code C1816 covers the receiver/transmitter unit of an implantable neurostimulator system. Coders frequently conflate it with the pulse generator or lead components, though each has its own distinct code. That misclassification triggers a mismatch between the […]
HCPCS Code C1880: Vena cava filter billing and fee schedule
HCPCS Code C1880 is a C-series HCPCS Level II code for a vena cava filter device. It applies to claims billed in hospital outpatient and ambulatory surgical center settings, always paired with a CPT procedure code rather than billed alone. This reference covers the 2026 fee schedule, OPPS and ASC status, applicable modifiers, related CPT […]
HCPCS Code B4100: Food thickener, administered orally
HCPCS Code B4100 (food thickener, administered orally, per ounce) is statutorily excluded from Medicare Part B and the DME benefit. No Certificate of Medical Necessity, ICD-10 diagnosis, or documentation packet makes it payable, because no Medicare benefit category covers a product administered by mouth. This guide covers the official descriptor, why Medicare never pays for […]
HCPCS Code A4231: Infusion set for external insulin pump, needle type
HCPCS Code A4231 describes a needle-type infusion set for an external insulin pump. Medicare does not pay it separately. CMS Policy Article A52507 bundles it into HCPCS Code A4224, the weekly infusion-supply allowance, and denies any separate claim as unbundling. This guide covers the official description of A4231, why it is not separately payable, and […]
HCPCS Code A6242: Hydrogel dressing billing guide (2026)
HCPCS Code A6242 is a hydrogel dressing billed as a wound cover, sterile, with a pad size of 16 square inches or less. It has no adhesive border and is billed per dressing under Medicare Part B’s durable medical equipment (DME) benefit. Misassigning A6242 to the wrong pad size or border type is one of […]
HCPCS code A4620: Variable concentration mask billing guide
HCPCS code A4620 covers the variable concentration mask, the adjustable oxygen mask suppliers bill alongside a patient’s home oxygen equipment. The code sounds like any other supply line. It doesn’t pay like one. A4620 rides on the oxygen equipment’s rental payment, and billing it separately is the priciest mistake suppliers make with this code. That […]