On July 14, 2026, the Centers for Medicare and Medicaid Services (CMS) released its Calendar Year 2027 Medicare Physician Fee Schedule (PFS) proposed rule, and the number reserve teams should note is the conversion factor. The nonqualifying-provider conversion factor falls from $33.40 to $32.84, a 1.68% cut; the qualifying-APM factor drops from $33.57 to $33.17, down 1.19%. The mechanical driver is the expiration of the one-year 2.5% increase Congress set for 2026 under Public Law 119-21, which the modest statutory updates and RVU adjustments for 2027 only partly replace. Comments are due September 14, with a final rule expected this fall and an effective date of January 1, 2027.
This is a Medicare pricing story on its face. For self-insured employers and workers’ comp captives, it is a medical severity story, but only in the states where it flows through.
Who it affects
The exposure is concentrated in states whose workers’ comp medical fee schedules index physician reimbursement to Medicare’s resource-based relative value scale (RBRVS). Roughly two-thirds of states tie their fee schedules to Medicare in some form, typically as a percentage of the Medicare allowable (for example 150% or 200% of the Medicare rate). Employers with WC exposure in those states will see the conversion-factor cut ripple into their physician claim costs to the extent their state adopts the new Medicare value on its usual update cycle. States that set independent conversion factors, or that reference an older frozen Medicare base year, will not move in lockstep, and a handful with no fee schedule at all (where physician prices run far higher) are insulated entirely from this change.
The reserve mechanism
The lever is severity on the price side of physician medical case reserves, and the direction is not as clean as the headline suggests. A lower conversion factor lowers the unit price per service in indexed states. But price is only half the equation. Compressed provider margins can reduce network access, lengthen treatment duration, and push care toward higher-cost facility settings, all of which raise utilization and alter the development pattern. WCRI’s Medical Price Index work has documented how wide physician price gaps already run between fee-schedule and non-fee-schedule states, and outpatient site-of-care shifts are separately reshaping WC cost, so a unit-price cut can be partly or fully offset before it reaches paid losses. A fee cut does not automatically release medical reserves, and through access and duration effects it can even add to them.
Where this shows up in your reserves
Look at the medical paid and case components of your WC development triangle in Medicare-indexed states, split from indemnity, and at the physician (not hospital or pharmacy) slice specifically. A conversion-factor cut should show as softer paid-per-service on recent service dates; a utilization offset shows as flat or rising visit counts and longer claim duration on the same accident years. If your severity trend selection embeds a medical inflation assumption, that is the row where a mechanical fee cut and a utilization pushback net out.
What this means for your next review
Do not book a 2027 severity reduction off the Medicare headline. Stage it: treat the proposed rule as a watch item now, confirm at the final rule this fall, and hold for utilization and duration offsets until your state DOI or WC board signals adoption.
Decision-maker checklist
- Ask your actuary which of your WC exposure states index to Medicare RBRVS and what share of medical reserves sits there.
- Confirm whether your indexed states adopt the current Medicare base year or a frozen prior year before assuming any 2027 pass-through.
- If a severity decrease is modeled, ask what utilization and site-of-care offset was netted against it.
- Set a review trigger for the CY 2027 PFS final rule this fall before it reaches case reserves.
See also our explainers on workers’ compensation IBNR and the reserve diagnostic guide, and prior coverage of the WC physician price gap and the WC outpatient site-of-care payment gap.
Sources
- CMS, Calendar Year (CY) 2027 Medicare Physician Fee Schedule Proposed Rule fact sheet (https://www.cms.gov/newsroom/fact-sheets/calendar-year-cy-2027-medicare-physician-fee-schedule-proposed-rule)
- American Hospital Association, CMS issues CY 2027 physician fee schedule proposed rule, July 14, 2026 (https://www.aha.org/news/headline/2026-07-14-cms-issues-cy-2027-physician-fee-schedule-proposed-rule)
- Holland and Knight, CMS Issues CY 2027 Medicare Physician Fee Schedule Proposed Rule (https://www.hklaw.com/en/insights/publications/2026/07/cms-issues-cy-2027-medicare-physician-fee-schedule-proposed-rule)