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Every Medicare-enrolled physician and group must revalidate its enrollment, usually every five years. Miss the date and Medicare can stop paying. If billing privileges are deactivated, Medicare pays nothing for the services in between, and the reactivation does not reach back to cover them.
While a Medicare patient is in a covered Part A skilled nursing facility stay, the facility is paid for almost everything the patient receives. Your office can still bill its professional services, but the technical part of an x-ray or other test belongs to the facility. Bill it to Medicare and it is denied or taken back.
While a Medicare patient is under a home health plan of care, only the home health agency can be paid for outpatient therapy and certain supplies. A physician office that bills those services gets a denial, or a recoupment months later, and it shows as the practice's loss.
On October 8, CMS and the CDC proposed the first broad update to the CLIA lab rules since 2023, and several changes would lighten the load on physician office labs. Comments close December 7. None of it changes how Medicare pays for an in-office test: every lab claim is still checked against the certificate your office holds.
Medicare's annual election period runs from October 15 to December 7, and every change made in it takes effect on January 1. Patients rarely tell the front desk. The first January visit is then billed to last year's payer, and a patient in the middle of treatment can be told to start an authorization over when the plan rules say otherwise.
CMS spent the last two weeks asking practices to talk to Medicare patients about breast and prostate cancer screening, and to check when each patient is next eligible. Medicare measures that interval in whole months after the month of the last test, not in days. Book a screening one week too early and the claim is denied; if no ABN was signed, the practice cannot bill the patient.
From October 1, 2026, federal Medicaid funding for many noncitizens ends, and that includes the Qualified Medicare Beneficiary program. CMS reminded practices today: a patient who leaves the QMB group loses the cost-sharing protection, but only from that date. Every earlier date of service stays protected.
CMS has rewritten the appeals chapter of its Medicare claims manual, effective December 11, 2026. The policy is unchanged, but the rules on late appeals are now plain: a physician practice gets good cause in two narrow situations, and a billing company that missed the date is never one of them.
CMS has told Medicare contractors to keep charging 11.875% interest on overpayments from October 21, 2026. Interest starts on day 31 after a demand letter and keeps running during an appeal. For a practice holding a disputed demand, the cost of waiting is now easy to work out.
Solo practitioners and practices with 10 or fewer MIPS eligible clinicians can combine with other small practices and be scored as one virtual group for the 2027 performance year. CMS opened the election on October 1, and it closes December 31, 2026. Once made, the choice holds for the whole year, and everyone in the group shares one score.
CMS has set the 2027 dollar thresholds for Medicare appeals: $200 for a hearing before an administrative law judge and $2,000 for federal court, from January 1, 2027. The numbers barely moved. What decides most practice appeals is earlier: the 30-, 60- and 120-day clocks, and whether small denials are grouped so they can reach a judge at all.
CMS used its October 15, 2026 MLN Connects newsletter to tell optometrists to bill nursing facility services correctly. Behind the reminder is an OIG audit in which all 399 high-level nursing facility visits billed by 15 optometrists failed Medicare's rules. Any eye-care practice that sends clinicians into nursing homes should check its own claims now.
CPT 2027 replaces global maternity billing with separate reporting for prenatal care, labor, delivery and postpartum care. UnitedHealthcare's October 2026 commercial bulletin is one of the first payer notices to say how to bill a pregnancy that starts in 2026 and ends in 2027. Practices that deliver babies have about eleven weeks to set up their own rules.
CMS has finalized the Global Benchmark for Efficient Drug Pricing (GLOBE) Model. Drug makers pay the rebates, but practices that buy and bill Part B drugs will see the effect at the front desk and in posting: from April 1, 2027, some Original Medicare patients will owe less coinsurance on certain drugs, and Medicare will pay the practice more. Which patients depends on where they live.
On October 8, 2026, CMS told Medicare's claims system to go back over Part B claims from May 11, 2023 through December 31, 2024 that used place of service 32 while the patient was in a covered Part A skilled nursing stay. Those claims will be reprocessed and any overpayment recouped. Practices that see patients in nursing homes can check their own exposure now.
Starting December 1, 2026, Medicare's eligibility system can suspend an NPI's enrollment if the monthly email it sends to the practice bounces three months in a row. Every eligibility check sent for that NPI is then rejected until the practice fixes the address through its MAC. Your clearinghouse cannot fix it for you.
Your 2026 MIPS score sets your Medicare Part B payments in 2028, with a negative adjustment of up to 9%. If a cyberattack, disaster or other event kept your practice from collecting data this year, the exception applications close December 31, 2026.
CMS used its October 1, 2026 MLN Connects newsletter to remind providers that Medicare does not pay for duplicate lab tests unless they are medically necessary. Modifier 91 covers a narrow case, and Medicare's own manual says misuse can be referred for review.
CMS's October 2026 update to the Medicare Physician Fee Schedule Database made ten drug J-codes invalid for Medicare from October 1. Several of the new codes for the same drugs use smaller billing units, so the units on the claim have to change with the code.
CMS's quarterly NCD coding update took effect for Medicare contractors on October 5, 2026. Several changes carry effective dates from 2024 through 2026, and contractors will adjust earlier claims only when providers bring them forward.
CMS added HCPCS G0685 to the October 2026 Hospital Outpatient Prospective Payment System update. Before a claim goes out, confirm the outpatient setting, current file version, service documentation, and separate coverage requirements.
CMS billing guidance says eligible FQHCs and RHCs may bill ACCESS Co-Management Payments for dates of service beginning October 1, 2026. The first claim review should confirm the track, documentation, code, and institutional billing setup.
Insights
A federal Medicaid rule takes effect in 2027, but its first revenue-cycle test will happen at check-in. Practices need a controlled way to verify coverage, route exceptions, and follow changes before they become denials or patient balances.
Prior authorization, NCCI bundling edits and payer AI are converging on claims at once in 2026. Here is the three-force breakdown, and the prevention plan that stops all three before they become denials.
CMS-0057-F was supposed to simplify prior authorization. Instead it made data-field precision mandatory, and independent practices are absorbing a 31% denial spike. Here is the PA-first workflow that stops it.
Payers now use AI to scan clinical notes before a claim ever reaches a human. Reactive denial management cannot keep up, so here is what fighting AI with AI actually looks like.
56% of denials trace back to patient eligibility, not coding. Here is why continuous verification, not better coding, is the fastest lever on your clean claim rate in 2026.
Median days in A/R have stretched past 52 days industry-wide. Here is why prevention, not faster follow-up, is the only way to get practices back under 30.
66% of practices now outsource all or part of their revenue cycle. Here is how to avoid becoming a ticket number, and the five questions that separate a partner from a vendor.
288 new CPT codes took effect January 1, 2026. Here is what changed in the CMS fee schedule, why most practices fall behind, and how to capture the new revenue without inviting an audit.
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