idea-010 · business case
Who pays, from which budget, how much, and 2-4 commercial routes to first revenue — every figure below traces to a copied claim or a declared assumption, and the routes are laid out unranked. Choosing a commercial strategy is a Tier 3 act, so this page presents options and stops.
Intended use: For the quantitative measurement of potassium and creatinine in fingerstick capillary whole blood by trained healthcare personnel at the point of care in outpatient clinics, as an aid in monitoring adults with chronic heart failure or chronic kidney disease during initiation and dose titration of renin-angiotensin-aldosterone system inhibitors; not for use in emergency, critical-care, or dialysis-adequacy decision-making.
Two cheques, written by two different parties, and the business only works if the second one is larger than the first. Since the last build the second cheque has a known size for one payer; the first still has no known size at all.
The chain's first link is still an assumption and its second is now half-known. Nobody has shown who buys the device. The verified CLFS rate shows what Medicare pays per test, but not whether the clinic keeps that payment, and not what running the test costs.
Six questions, each with its own evidence position and one basis. No score, no tier, no composite. Read the coverage line first.
| # | Question | Finding | Basis |
|---|---|---|---|
| 2a | Coding route — Cat I / Cat III / unlisted / HCPCS (Healthcare Common Procedure Coding System) II / none | Existing Category I laboratory codes, with no new code sought. Potassium 84132 and creatinine 82565 both exist and are priced on the CLFS claim 14verified. Whether a capillary fingerstick sample from this device sits inside those codes' descriptor wording is the question that matters here. That wording is AMA-licensed, is not reproduced here, and was not checked for either code claim 12unconfirmed. Billing from a waived-certificate site is said to need the QW modifier, which is also unchecked claim 13unconfirmed. hcpcs 84132 returns unconfirmed because a Level I code cannot be found in the Level II file | claim 11unconfirmed |
| 2b | Payment adequacy — does the rate clear a stated cost floor | The rate is known and no cost floor has been stated. Medicare CLFS national limitation amounts for 2026 are $4.76 for potassium and $5.12 for creatinine claim 14verified. That is $9.88 for the pair, if both are paid claim 38unconfirmed. Nothing in the file quantifies the other side: strip cost, meter amortisation, QC material and operator time. So whether the payment clears the cost is still open claim 36unconfirmed. The rates are Medicare fee-for-service only. The case assumes other payers pay at least as much [assumption A3] | claim 36unconfirmed |
| 2c | Practice-expense headroom — does the PE portion cover the device | There is no practice-expense portion, by construction. Both codes carry PFS (physician fee schedule) procedure status X, a statutory exclusion from the definition of a physician service. That means no physician payment and no PE RVU (relative value unit) for the strip's cost to sit inside claim 14verified. The device can only be recovered from the CLFS lab payment in 2b | claim 14verified |
| 2d | Site of care & bundling — office/facility differential, DRG or APC packaging | Office or hospital department is not settled, and bundling of the pair is unchecked. The verified Medicare carrier-file volume is almost entirely office/non-facility: 319,876 of 320,020 potassium services claim 16verified. That file carries no hospital-outpatient institutional claims, though, so it cannot say how many target clinics are hospital-owned departments. The case assumes a material share are physician offices [assumption A2]. apc 84132 and apc 82565 return unconfirmed because no OPPS Addendum B cache exists, so how the tests are treated in a hospital-outpatient setting was not checked. That is a tooling gap, not a finding. No DRG applies: the intended use is outpatient only. Whether two analytes from one specimen are paid separately is an NCCI question with no connector claim 38unconfirmed | [assumption A2] |
| 2e | Coverage — has any payer agreed to pay for this indication | No payer has been shown to cover this indication, and no policy has been shown to restrict it. coverage 84132 and coverage 82565 both return refuted: no policy in the cached coverage file names either code. The file does not carry that result as a tag. The cache is the MCD billing-and-coding article export and carries no NCD (national coverage determination) text, and a no-policy result points the same way as the claim rather than against it claim 15unconfirmed. With no policy, claims go to case-by-case contractor adjudication. How often a titrating patient can be tested and still be paid is unknown | claim 15unconfirmed |
| 2f | Ex-US pathway — DE NUB/G-DRG, UK NICE (National Institute for Health and Care Excellence)/OPCS-4 | Permanently unconfirmed, and not because research is missing. launch_jurisdiction: is US, and no connector in this repo reaches a non-US payment system. For Germany, the case assumes an outpatient point-of-care test is paid within an existing statutory ambulatory laboratory fee position, so no new-method route is needed. NUB and G-DRG are inpatient and do not apply to this intended use. That is assumed, not checked [assumption A1]. The UK has no claim or assumption behind it in either direction | [assumption A1] |
Pillars on verified claims: 1/6 · on assumptions: 2 · queued as research: 0
The other three (2a, 2b, 2e) rest on unconfirmed claims. Read the one verified pillar for what it says. It is 2c, and it is a negative: there is no practice-expense line to carry the device. Since the last build the rate in 2b and the volume in 2d have both become verified facts, but they are not what those rows turn on. 2b turns on cost, which nobody has stated. 2d turns on site of care, which the verified file cannot see. So the verified information on this page grew, and the verified pillar count grew by only the one row that answers no.
Three distinctions kept apart on purpose:
apc has no cache. So it is an open question, not a clear one.
unconfirmed. It will not be settled by a further pass inside this repo.
Verdicts from checks that were run and came back unusable, stated as the spec asks:
python3 -m connectors cpt 84132 → unverifiable: "CPT (Current Procedural Terminology) descriptors are AMA-licensed and cannot be scraped or reproduced verbatim ... The code NUMBER is not barred".
python3 -m connectors hcpcs 84132 --jurisdiction US → unconfirmed: a Level I code, which the Level II file cannot answer for.
python3 -m connectors apc 84132 --jurisdiction US and apc 82565 → unconfirmed: "No local cache at data/opps_addendum_b.csv".
python3 -m connectors rvu 84132 --jurisdiction US and rvu 82565 → refuted: procedure status X, "there is no separate physician payment to fund a device out of". This is the finding behind 2c, and the file already carries it inside claim 14verified.
There is no market model for this candidate (knowledge-base/market-models/idea-010.md does not exist), so there is nothing to link. This case does not build the size in its place. The rows below are the unit economics the file can support, and each one says where its number comes from or that there is none. /market-model idea-010 is the cheaper next pass for the size question.
| Line | Figure | Backing |
|---|---|---|
| Medicare FFS (fee-for-service) services, standalone potassium code 84132, national | 320,020 services, of which 319,876 office/non-facility and 144 facility. This is a floor in one payer's fee-for-service carrier book, and it excludes potassium reported inside a panel and hospital-outpatient institutional claims. Not a market size, and mostly central-lab draws this device does not take | claim 16verified |
| Medicare FFS services, standalone creatinine code 82565, national | 1,160,145 services, of which 1,160,036 office/non-facility and 109 facility. Same caveats | claim 16verified |
| Medicare CLFS payment per test, potassium 84132 | $4.76, 2026 national limitation amount | claim 14verified |
| Medicare CLFS payment per test, creatinine 82565 | $5.12, 2026 national limitation amount | claim 14verified |
| Medicare CLFS payment for the pair from one strip | $9.88, if both are paid separately, which is unchecked | claim 38unconfirmed |
| Medicare Advantage and commercial payment per test, relative to the CLFS | at or above the Medicare rate. Assumed, not checked | [assumption A3] |
| Clinic keeps the payment rather than the reference lab | not established | claim 37unconfirmed |
| Fully loaded in-office cost per paired test (strip, meter amortisation, QC, operator time) below the payment | not established. No cost figure appears anywhere in the file | claim 36unconfirmed |
| Net strip price to the clinic | none asserted. The Medicare ceiling for the pair is $9.88, and the floor (strip cost of goods) has no source | claim 17unconfirmed |
| Strip price set below the combined allowable with room for manufacturer margin | not established | claim 45unconfirmed |
| Manufacturer gross margin per strip | not established | claim 46unconfirmed |
| Meter price or placement cost to the clinic | not established | claim 47unconfirmed |
| In-visit paired tests per insourcing clinic per year | not established. National totals do not break down to a clinic | claim 48unconfirmed |
| Count of US HF and nephrology clinic sites sending potassium out today | not established. market returns unverifiable, and no licensed source has been shown to exist | claim 35unconfirmed |
| Share of such clinics insourcing within five years | 10-20%, the Generator's own figure, over an uncounted denominator | claim 18unconfirmed |
| Share of insourcing clinics choosing this device over an incumbent point-of-care analyzer | not established | claim 49unconfirmed |
| Share of placements still running potassium in-house twelve months later (the revealed-behaviour twin of "would clinics switch") | a majority, assumed. Settled by reorder data, not by asking | [assumption A4] |
| Invalid-result rate per fingerstick attempt in ordinary clinic hands | not established. Bench work, no connector | claim 23unconfirmed |
No revenue line and no composite dollar figure appear on this page, on purpose. Multiplying the Medicare service counts by the CLFS rates would give the Medicare fee-for-service spend on standalone potassium and creatinine tests, run almost entirely in central labs claim 16verified. That is not revenue this device could reach, and the candidate's own claim says it must never be read as a market size. Every row that would turn that spend into device revenue sits on an unconfirmed claim or an assumption.
What the verified rows do settle is a ceiling, not a price. Under Medicare fee-for-service, a clinic that pays more than $9.88 for the strip, meter share, QC and staff time behind one paired result loses money on every test it insources claim 14verified. That holds even if everything else in the table resolves in the device's favour claim 36unconfirmed.
Verdicts for the two claim types a business case is mostly made of, run for this build:
python3 -m connectors market "the US addressable market for a fingerstick potassium and creatinine strip in outpatient heart-failure and nephrology clinics" → unverifiable: "has no free, authoritative, machine-queryable source. Stays unconfirmed permanently unless a human attaches a licensed report".
python3 -m connectors adoption "outpatient heart-failure and nephrology prescribers will change a RAASi or MRA dose in-visit on a fingerstick potassium result rather than order a confirmatory venous draw" → unverifiable: "needs primary research ... Do NOT substitute a model's own estimate of stakeholder behaviour". This is the same question as claim 28unconfirmed.
python3 -m connectors adoption "outpatient heart-failure and nephrology clinics would buy a fingerstick potassium and creatinine strip meter instead of sending the test to an outside laboratory" → unverifiable, same detail. Its revealed-behaviour twin is carried as [assumption A4].
Checkable primitives re-run for this build rather than quoted: payment 84132 and payment 82565 → verified, procedures 84132 and procedures 82565 → verified, coverage 84132 and coverage 82565 → refuted (no policy names the code), rvu → refuted (status X), apc → unconfirmed (no cache), hcpcs 84132 → unconfirmed (Level I code). Each one reproduces what the candidate file records. icd was not used for population, because its cache is absent (icd N18.3 → unconfirmed).
Four routes. None is ranked or weighted, and they are laid out in the order the candidate file raises them. All four sit on one claim no connector reaches: whether a fingerstick hemolysis channel can tell a biased sample from a clean one claim 22unconfirmed. That is a fact about the file, not a ranking.
The model the candidate itself describes. A device company sells to outpatient HF and nephrology clinics, and they bill 84132 and 82565 themselves claim 14verified.
Sell the differentiator rather than the form factor. The hemolysis detect-and-suppress logic is qualified as an add-on to a platform that already has a cleared whole-blood point-of-care potassium channel. The Piccolo potassium clearance is the verified half of claim 10unconfirmed, and the incumbent field is named in claim 27unconfirmed.
Go straight to at-home RAASi titration, which the candidate's frontmatter calls the biggest commercial lever, instead of treating home use as a second submission.
Step around the per-test CLFS margin by selling in-visit monitoring to health systems or HF/CKD programmes, priced against the cost of patients coming off RAASi or MRA therapy rather than against a lab fee schedule.
Four new assumptions, each with what would settle it and who could run it. They were appended to the candidate as unverified claims 56–59 before this file was written. A1 is claim 56unverified, with jurisdiction: DE. A2–A4 are claims 57–59, with jurisdiction: US.
The previous build's twelve assumptions were written back as claims 44–55, and the Verifier attempted all of them on 2026-09-29. All came back unconfirmed. They are cited above as claims and not re-declared, because a figure travels as the claim that recorded it.
| # | Assumption | Falsifier | Owner |
|---|---|---|---|
| A1 | In Germany, a point-of-care potassium and creatinine test run by an outpatient cardiology or nephrology practice is paid to that practice within an existing statutory ambulatory laboratory fee position (EBM chapter 32), so no new-method assessment is needed before statutory insurers pay | A human reading the current EBM laboratory chapter and its rules on practice-performed tests. A single case where such a test needs a separate G-BA method assessment, or cannot be billed by the performing practice, would settle it against. No connector reaches a non-US payment system, so this cannot be closed inside the pipeline | Ex-US reimbursement analyst |
| A2 | A material share of the target US outpatient HF and nephrology clinics are physician-office sites billing potassium and creatinine to Part B on their own CLIA certificate, rather than hospital-owned provider-based departments billing on the hospital's institutional claim | CMS (Centers for Medicare & Medicaid Services) Provider of Services and CLIA laboratory files cross-referenced to cardiology and nephrology practice locations, splitting sites into independent physician-office labs and hospital-owned departments. Then apc 84132 once data/opps_addendum_b.csv exists, for how the hospital-department share is paid | Reimbursement analyst |
| A3 | Medicare Advantage and commercial payers pay a physician-office laboratory for 84132 and 82565 at or above the Medicare CLFS national limitation amounts | Negotiated rates for the two codes from payer Transparency-in-Coverage machine-readable files, for three large commercial plans and two MA (Medicare Advantage) plans in two target states. Any plan paying below the CLFS amounts lowers the ceiling in the money model | Reimbursement analyst |
| A4 | A majority of US outpatient cardiology and nephrology practices that placed a point-of-care chemistry analyzer capable of potassium testing were still running potassium on it in-house twelve months after placement | Reagent reorder data for potassium-capable point-of-care cartridges or rotors at cardiology and nephrology accounts, from a distributor or a willing incumbent, at months three and twelve after placement, with the stated reason for any lapse. This is revealed behaviour, and it replaces asking clinics whether they would switch | Commercial / business development |
Every figure with no claim behind it, gathered as work items.
launch_jurisdiction: is US. The German assumption is
new with this build, and nothing speaks to the UK in either direction.
_shared/plain-language.md