Two days ago we published the most precise prices in this industry. A powered lower-limb exoskeleton billed to Medicare under HCPCS code K1007 pays $95,081.03. A multi-articulating prosthetic hand under L6880 pays $28,715.00. Both come from a public CMS file, both are national, both are quoted to the cent.
Neither number tells you whether the device in front of you may be billed at it.
That is decided by a different list, maintained by a different organisation, published on a different website, and absent from the fee schedule entirely. It is called the Product Classification List, and it is the part of medical robotics market access that almost nobody writes about.
How the second list works
The Centers for Medicare & Medicaid Services contracts Palmetto GBA to act as the Pricing, Data Analysis and Coding contractor — the PDAC. Its job, per the DME MAC Jurisdiction C supplier manual, is to help suppliers and manufacturers apply HCPCS codes correctly, and it runs the online coding system where those decisions are looked up.
The mechanism itself is simple, and Össur's regulatory team lays it out plainly: manufacturers and distributors submit a Coding Verification Review request for their device; the PDAC reviews it and determines the correct HCPCS code; if verified, the PDAC issues a letter and adds the device to the Product Classification List under that code. Then comes the sentence that matters: "If a product is billed to Medicare using a HCPCS code that requires written CVR, but the product is not on the PCL for that particular HCPCS code, then the claim line will be denied as incorrect coding."
Not reduced. Not appealed on medical necessity. Denied as a coding error, on a device that may be clinically perfect for the patient.
The dates matter more than the mechanism
Coding verification is voluntary until a policy makes it mandatory, and the codes carrying the largest numbers in robotics have all been made mandatory recently:
- K1007, powered lower-limb exoskeletons: mandatory for dates of service on or after 1 June 2024
- L6715 and L6880, articulating digits and prosthetic hands: mandatory since 1 January 2022
- L1843 and L1951, knee and ankle-foot orthoses: added effective 1 December 2024
The robots we priced last week sit on the first two lines. The $95,081.03 exoskeleton code and the $28,715.00 hand code are both gated codes, and have been for years.
The third line explains how the gate grows. Össur's account of the December 2024 addition is that it followed automatically from a prior-authorization update, "because all codes that require prior authorization also require a CVR." That coupling is the important structural fact. The set of gated devices is not curated by anyone thinking about robotics; it expands as a by-product of a separate policy process aimed at something else entirely.
What a gated code looks like from the inside
Here the reporting gets thinner, and I want to be explicit about why. The DME MAC correct-coding article for powered lower-extremity exoskeletons is reported to state that one product is CMS-coded as K1007 — the ReWalk, by Argo Technologies. I could not open that page. Both dmepdac.com and Noridian's policy site were unreachable from our network throughout the day, so we have the text of those pages as indexed rather than as read, and I am marking the claim unverified at source rather than dropping it, because it is consistent with everything else on the record: CMS created the code in the first place through the HCPCS public-meeting process, and the 2023 final rule CMS-1780-F that made powered exoskeletons billable at all did so by codifying them as braces under 42 CFR 410.2 — a definitional change, applied to a category, that in practice had a very short list of qualifying products behind it.
If that reading is right, it retires a puzzle from our own reporting. On 5 August we found that three powered-device codes had moved from April 2024 to January 2026 by an identical factor of ×1.044479, through a period in which ReWalk 7 cleared FDA and reached market. On 6 August we found the same thing at scale: 147 of 149 comparable upper-limb codes moved by exactly ×1.024 and then ×1.020. We called it indexation rather than pricing. Our view: a fee schedule with a near-empty billable list has nothing to reprice against. Competition cannot show up in a price when it cannot show up on the list.
Who carries the cost of the gate
The filing burden sits with the manufacturer or distributor, not the clinician and not the patient. The consequence of not filing is described bluntly by two healthcare attorneys writing for Medtrade: if a product neither fits an established HCPCS code nor gets a new one, Medicare will likely not pay, commercial payers often follow, patients pay out of pocket, and suppliers therefore will not buy the device from the manufacturer in the first place.
Read that chain backwards and you have the real barrier to entry in medical robotics. It is not FDA clearance, which the trade press covers exhaustively. It is not the price, which is published. It is an administrative filing whose absence makes a cleared, capable device commercially invisible — and whose presence is a matter of public record that hardly anyone checks.
There is a documentation tail, too. Össur notes that clinicians must record the specific product name and manufacturer in their notes; without that, the payer cannot confirm the delivered device was verified, and the claim fails anyway. A device can be on the list and still be denied because the chart does not say which device it was.
What to check before you specify one
For anyone buying, prescribing or building in this category:
- Check whether the code is gated at all. The PDAC publishes the list of HCPCS codes requiring coding verification along with each one's effective date.
- Check the device, not the brand. Verification is granted per product, and a successor model is a different product.
- Check before delivery, not after. The denial is triggered by date of service.
- Treat prior authorization as a leading indicator. If a code is added to the PA list, expect the verification requirement to follow.
- Ask a vendor for the PDAC letter. It exists or it does not, and the answer takes one email.
The fee schedule is the most transparent price in this industry. It is also, on its own, one of the least useful — because the number is public and the permission is not.
Sources
- DME MAC Jurisdiction C Supplier Manual, Chapter 16 — Coding (CGS Administrators, Spring 2026) — PDAC contractor role and DMECS
- New Codes Requiring Coding Verification Review from PDAC (Össur R&R, Brittany Gonzalez, 19 June 2024) — CVR mechanism, PCL denial language, L1843/L1951 effective 1 December 2024, prior-authorization coupling
- DME MACs Post New Coding for Upper-, Lower-limb Exoskeletons (The O&P EDGE, 4 January 2024) — CMS-1780-F, 42 CFR 410.2, K1007 code language
- PDAC Verification Process: The Initial Application (Medtrade, Cara C. Bachenheimer JD and Jacque K. Steelman JD, 22 March 2024) — commercial consequences of not being coded
- PDAC — Items Requiring Coding Verification Reviews — the authoritative list of gated codes and effective dates (not reachable from our network on 7 August 2026)
- Powered Lower Extremity Exoskeleton — Correct Coding (Noridian) — source of the single-product K1007 statement (not reachable from our network on 7 August 2026; claim flagged unverified at source)
- Our own price readings: When Medicare sets a robot price and a bionic arm by the code
