Codes, payment rates, coverage policy, and whose budget it comes from — pediatric persistent asthma home monitoring

1. Summary

The CY2026 Medicare Physician Fee Schedule finalized two conversion factors — $33.5675 for clinicians who are qualifying Alternative Payment Model participants and $33.4009 for everyone else — and created two new, lower-intensity remote-physiologic-monitoring billing codes for periods with less than 16 days of data transmission per 30-day period or less than 20 minutes of interactive communication per month [1]. Separately, the DME payment mechanism that would price monitoring hardware itself runs on its own quarterly update cycle, with the resulting fee-schedule files distributed to state Medicaid agencies and managed-care organizations as reference files [2] — but no rate specific to a pediatric home spirometer or peak-flow HCPCS Level II code could be confirmed this pass. Because children aged 5-17 sit outside Medicare, the money for this population runs mostly through state Medicaid/CHIP and commercial coverage: a survey of all 50 states', DC's and Puerto Rico's Medicaid programs found device and spirometry benefits for guideline-based asthma care improved between 2016-2017 and 2021-2022 but remained inconsistent, with roughly a third of programs still covering peak-flow meters, nebulizers and spirometry only partially or not at all as of the later survey [3][4]. One state-level claims-database study found Medicaid was the majority insurer (64.4%) of children with a coded asthma diagnosis [5], and a national parent survey found that cost-sharing plan design, not enrollment status alone, predicted whether a low-income family delayed or avoided asthma-related care [6]. This report could not establish a national Medicare or Medicaid rate specific to a pediatric home-monitoring HCPCS code, nor cite a commercial RPM payer policy in a form this report's identifier format can carry — both recorded in Gaps below.

2. What Changed

_Baseline (v1). No prior version; this establishes the starting point for future diffs._

3. Details

CY2026 Medicare Physician Fee Schedule — the professional-service side

CMS's own Federal Register text, read directly rather than through a secondary summary, states: "We estimate the CY 2026 PFS qualifying APM CF to be $33.5675" and "We estimate the CY 2026 PFS nonqualifying APM CF to be $33.4009" [1]. The same document states that "the CPT Editorial Panel created two new RPM codes to describe RPM services that describe less than 16 days of data transmission per 30-day period and less than 20 minutes of interactive communication per month," identified in the rule only by their bare numbers, 99445 and 99470 [1]. This is new to this domain's record: the dossier's own reimbursement section documents CY2026 payment amounts for the three existing RPM codes but does not mention that two additional, lower-utilization codes now exist for periods that miss the existing codes' day/minute thresholds. These are Medicare professional-service rates; children 5-17 are not Medicare beneficiaries, so their direct relevance here is as the reference point other payers commonly anchor to, not as a rate anyone in this population is actually paid.

CMS's DME payment infrastructure — where the monitoring hardware itself would be priced

The professional-service codes above pay for monitoring and interpretation, not the device. CMS's own quarterly DMEPOS fee-schedule update process — most recently confirmed here via the July 2025 update, MLN Matters MM14088, transmittals R13257CP and R13277CP — "updates the DMEPOS fee schedule quarterly, as necessary, to implement fee schedule amounts for applicable new and existing codes," and states plainly that the resulting files "will be available as Public Use Files for state Medicaid agencies, managed care organizations, and other interested parties" [2]. That July 2025 update added or deleted no codes and did not name a home-spirometer or peak-flow HCPCS Level II code among the codes it corrected [2], so no gap-filling event for that code family was located this pass. Separately, this repo's own hcpcs, payment, coverage and procedures connectors were each run against HCPCS E0487 ("Spirometer, electronic, home model") and each returned the identical missing-local-cache result, naming data/hcpcs_level_ii.csv, data/hcpcs_payment_rates.csv, data/medicare_coverage_policies.csv and data/medicare_procedure_volumes.csv respectively as absent from this environment — a statement about this repo's own cache, not a finding about whether CMS has established a national rate for that code.

State Medicaid coverage of guideline-based pediatric asthma care — devices and spirometry specifically

The American Lung Association's Asthma Guidelines-Based Care Coverage Project tracked coverage in all 50 states', DC's and Puerto Rico's Medicaid programs "by reviewing publicly available plan documents and engaging with Medicaid programs to review and confirm findings" [3]. Its 2021-2022 update reports: "Thirty-five Medicaid programs fully covered spirometry, and 17 more had coverage that varied by plan," and, for the broader medical-devices category that bundles peak flow meters, nebulizers and valved holding chambers, 34 of the 52 programs offered full coverage and 18 more had coverage that varied by plan [3]. The project's own comparison to its 2016-2017 baseline states: "Results from the Project, which reflect coverage in 2021-2022, show an increase in comprehensive coverage in Medicaid programs over the last 5 years. However, coverage remains inconsistent across programs, and barriers to accessing asthma care still exist" [3][4]. Read plainly: as of the most recent wave, roughly a third of state Medicaid programs did not fully cover the device category a peak-flow or spirometer-based home-monitoring product would fall into, even though the trend across the two waves runs toward more coverage, not less.

Whose budget — payer mix and cost exposure for the family

In a Massachusetts All-Payer Claims Database cohort of 171,416 unique children (317,596 child-year observations, 2015-2018), "of these, 64.4% were insured by Medicaid" among children with an asthma diagnosis [5]. This is one state's claims data, not a national figure, and is reported here as such — it should not be read as the national Medicaid/CHIP share of pediatric asthma. Separately, a 2012 telephone survey of 769 parents of children aged 4-11 with asthma, describing experience in the prior year within one integrated delivery system, found that parents at or below 250% of the federal poverty level with higher cost-sharing were far more likely to delay or avoid a physician office visit because of cost than those with lower cost-sharing at the same income level (31.6% vs. 3.8%; adjusted odds ratio 0.07, 95% CI 0.01-0.39) and an emergency-department visit (19.4% vs. 1.2%; OR 0.05, 95% CI 0.01-0.25); overall, 15.6% of all surveyed parents "borrowed money or cut back on necessities" to pay for their children's asthma care [single-source] [6]. The finding that plan cost-sharing design, not merely whether a family has coverage at all, predicts care-avoidance is the closest published evidence this pass located for how payment structure could shape whether a family sustains a monitoring regimen that depends on regular clinical follow-up.

4. Sources

[1] Medicare and Medicaid Programs; CY 2026 Payment Policies Under the Physician Fee Schedule and Other Changes to Part B Payment and Coverage Policies — Federal Register, Centers for Medicare & Medicaid Services (published 2025-11-05; accessed 2026-09-01). FR Doc. 2025-19787 (90 FR 49266) — https://www.federalregister.gov/documents/2025/11/05/2025-19787/medicare-and-medicaid-programs-cy-2026-payment-policies-under-the-physician-fee-schedule-and-other [federal-registry] [2] DMEPOS Fee Schedule: July 2025 Quarterly Update — MLN Matters MM14088, Centers for Medicare & Medicaid Services (released 2025-06-20; accessed 2026-09-01). Transmittals R13257CP and R13277CP — https://www.cms.gov/files/document/mm14088-dmepos-fee-schedule-july-2025-quarterly-update.pdf [federal-registry] [3] Medicaid Coverage of Guidelines-Based Asthma Care Across 50 States, the District of Columbia, and Puerto Rico, 2021-2022 — Preventing Chronic Disease (published 2023-09-07; accessed 2026-09-01). PMID 37676856 — https://pmc.ncbi.nlm.nih.gov/articles/PMC10487780/ [peer-reviewed] [4] Medicaid Coverage of Guidelines-Based Asthma Care Across 50 States, the District of Columbia, and Puerto Rico, 2016-2017 — Preventing Chronic Disease (published 2018-09-06; accessed 2026-09-01). PMID 30191809 — https://pubmed.ncbi.nlm.nih.gov/30191809/ [peer-reviewed] [5] Differences in Health Care Utilization for Asthma by Children with Medicaid Versus Private Insurance — Population Health Management (published 2024-04-02; accessed 2026-09-01). PMID 38574325 — https://pmc.ncbi.nlm.nih.gov/articles/PMC11001504/ [peer-reviewed] [6] Financial Barriers to Care Among Low-Income Children With Asthma: Health Care Reform Implications — JAMA Pediatrics (published 2014, month not given in the PubMed record; accessed 2026-09-01). PMID 24840805 — https://pubmed.ncbi.nlm.nih.gov/24840805/ [peer-reviewed]

5. Sourcing & Gaps

Well established: Two independent, dated waves of the same CDC-published state-Medicaid coverage-tracking project [3][4] establish that state Medicaid guideline-based asthma-care coverage, including the device category relevant to this domain, improved between 2016-2017 and 2021-2022 while remaining inconsistent across states — stated plainly because both papers disclose a methodology of direct plan-document review confirmed with each Medicaid program, not a single unconfirmed assertion. The CY2026 conversion-factor and new-code facts [1] rest on a direct connector retrieval of the Federal Register document's own text rather than a secondary summary.

Thin: The 64.4%-Medicaid figure [5] is a single state's (Massachusetts) 2015-2018 claims cohort — not assumed to generalize nationally. The cost-sharing findings [6] rest on one 2012 survey describing 2011 experience within a single integrated delivery system, marked [single-source], and are more than a decade old; ACA cost-sharing subsidy rules the paper's own conclusion treats as central have themselves changed since 2014. CMS's DMEPOS quarterly-update mechanism [2] is described from one MLN Matters article that happened not to touch the home-spirometer/peak-flow HCPCS code family — it documents how the mechanism works, not a rate for this domain's device.

Rescoped from class 3: None in this report. Every proposition here is either a federal-registry fact retrieved directly or a peer-reviewed published measurement; none asks what a payer, clinician or family would do.

Out of scope: CPT descriptor text throughout — no CPT code's descriptive language is reproduced anywhere in this report, per the manifest's scope note; the CPT code numbers named above (99453, 99454, 99457, 99445, 99470) are cited as bare identifiers only. Non-US coverage policy is out of scope; no connector in this repo queries one.

Not searched vs. not found: Not found in a form this report's identifier format can carry — two national commercial payers' own remote-physiologic-monitoring policies (Aetna's Clinical Policy Bulletin 1093, effective 2026-02-27, last reviewed 2026-05-31; and UnitedHealthcare's CY2026 remote-physiologic-monitoring reimbursement policy, described via a professional-society summary after the primary UnitedHealthcare PDF itself returned HTTP 404 on direct fetch) were each read this pass. Aetna's own coding table lists only CPT and ICD-10 codes — no HCPCS Level II code appears anywhere in it — so no citation to either policy can satisfy this report's resolvable-identifier requirement without reproducing a barred CPT descriptor or fabricating a code's relevance; this is recorded as a structural mismatch between the manifest's HCPCS-only scope and how commercial RPM policies are actually coded, not as a topic nobody looked at. Not retrieved — a state Medicaid provider-manual chapter said (by a third-party telehealth-policy tracker) to name pediatric asthma directly as an RPM-qualifying diagnosis for one state (Alabama); the underlying primary manual chapter returned HTTP 503 on two direct fetch attempts this pass, so no line above rests on it. Not searched — HCPCS-coded state Medicaid billing specifically for a peak-flow or spirometer monitoring device, as distinct from the guideline-based-care coverage categories in [3][4]; any commercial payer besides Aetna and UnitedHealthcare; a true GPCI=1.0 national RPM payment figure, which this domain's dossier already flagged as needing the companion CMS RVU/GPCI file and which was not attempted again this pass.

[inference] The pattern across this report — a Medicare professional-service rate structure that keeps splitting further by intensity and APM status [1], a DME payment mechanism administered separately on its own cycle that did not touch this device family this quarter [2], Medicaid device coverage that is improving but still leaves roughly a third of states with partial or no spirometry/device coverage [3][4], and at least one national commercial payer's policy that names only cardiometabolic conditions as medically necessary for RPM — is consistent with, but does not establish, a reimbursement landscape in which no single payer type is a reliable, uniform check-writer for this device category nationally; which payer actually pays most likely varies by state Medicaid program, plan design, and which specific billing code a given claim uses. This sentence is the writer's own synthesis of the sourced lines above, not a finding any cited source states as such.

6. Claim Candidates