Avalere Health Warns of $725M Hit: How CMS's 2027 Modifier 25 Proposal Threatens Medical Practices

The medical coding and billing landscape is bracing for a seismic shift. According to a stark new analysis published in October 2026 by Avalere Health, proposed changes in the Centers for Medicare & Medicaid Services (CMS) Calendar Year (CY) 2027 Medicare Physician Fee Schedule (MPFS) could result in devastating financial consequences for independent practices.

At the center of the controversy is a proposed 50% payment reduction for same-day evaluation and management (E/M) services billed alongside minor procedures. If finalized, Avalere Health estimates this policy—combined with the phaseout of the indirect practice cost index (IPCI)—could trigger a nearly 16% reduction in Medicare payments for dermatology and skin cancer care alone, amounting to approximately $725 million in annual cuts.

For medical coders, billers, and practice managers, understanding the mechanics of this proposed rule and strictly adhering to current modifier 25 billing guidelines is more critical now than ever.

The CY 2027 Modifier 25 Proposal Explained

Historically, the use of modifier 25 in medical billing has been the standard method to identify a significant, separately identifiable E/M service performed by the same physician on the same day as another procedure or service.

Under the current system, when an E/M visit meets the criteria for this modifier, Medicare pays for both the E/M service and the procedure. However, CMS’s CY 2027 proposed rule (released in July 2026) argues that when a provider performs an E/M service and a minor procedure (one with a 0-, 10-, or 90-day global period) during the same encounter, there is an overlap in practice resources, such as clinical staff time and exam room usage.

To account for this perceived duplication, CMS is proposing to pay the highest-valued service at 100% and slash the payment for the additional E/M visit or applicable procedure by 50%.

Specialty Practices in the Crosshairs

While the Avalere Health report heavily highlights the $725 million blow to dermatology, the ripple effects will be felt across multiple specialties that frequently rely on same-day interventions, including podiatry, orthopedics, and pain management. The American Podiatric Medical Association (APMA), for example, projects a 6% overall Medicare cut for podiatrists driven largely by this very Modifier 25 proposal.

Consider a standard dermatology encounter: A patient presents for a routine chronic psoriasis follow-up. During the exam, the dermatologist discovers a highly suspicious lesion on the patient's nose. The physician performs a thorough, separate evaluation of the new lesion, diagnoses it clinically, and decides to perform a same-day punch biopsy.

Under current rules, the coder would report the E/M code appended with HCPCS modifier 25, alongside the biopsy procedure (e.g., CPT code 11104). The claim would be supported by the appropriate ICD-10 code for basal cell carcinoma face, such as ICD-10-CM code C44.311 (Basal cell carcinoma of skin of nose) or ICD-10-CM code C44.319 (Basal cell carcinoma of skin of other and unspecified parts of face).

If the 2027 rule is finalized, the reimbursement for one of those two distinct services would be cut in half, despite the physician performing two medically necessary, distinct tasks.

The Threat to Patient Access and Practice Viability

Medical advocacy groups, including the American Medical Association (AMA) and the American Osteopathic Association (AOA), alongside more than 150 other medical organizations, have mounted a fierce opposition. In formal comment letters submitted to CMS in August and September 2026, these groups urged the agency to withdraw the policy.

Advocates argue that the proposal relies on an unsubstantiated assumption of duplication. Furthermore, CMS proposed a substantially similar policy in 2019 but ultimately abandoned it after stakeholders raised identical concerns. Industry leaders warn that penalizing same-day services will force physicians to require patients to schedule multiple appointments on different days. This artificial splitting of care increases travel time, copays, and time away from work for patients, directly threatening timely access to care for vulnerable Medicare beneficiaries.

What Billers and Coders Must Do Now

While the CY 2027 final rule is still pending, practices must prepare for tighter scrutiny. Here is what revenue cycle teams should prioritize:

1. Audit Your Modifier 25 Usage: Review your current claim data to quantify your practice's financial exposure. Identify how often your providers bill an E/M service alongside a 0-, 10-, or 90-day global procedure.
2. Bulletproof Your Documentation: Ensure that the medical record explicitly supports the separate and significant nature of the E/M visit. The documentation must clearly show that the E/M service went above and beyond the usual pre-operative and post-operative care associated with the procedure.
3. Link Diagnoses Carefully: Always map the specific procedure to its corresponding diagnosis code, and the E/M service to its respective diagnosis code, especially if they differ.

As the healthcare industry awaits CMS's final decision on the CY 2027 MPFS, the Avalere Health data serves as a stark warning. Medical coding and billing professionals must remain vigilant, as the financial health of independent practices may soon depend on their ability to navigate these aggressive reimbursement reductions.