CMS 2024 Network Adequacy Final Rule: What Changed and What It Means for MA Plans

Rulemaking Timeline and Effective Dates

The 2024 Medicare Advantage and Part D final rule was published in the Federal Register on April 23, 2024, following a proposed rule released in November 2023. The comment period generated substantial feedback from MA plans, provider associations, and beneficiary advocacy groups, and CMS made several modifications between the proposed and final rule. Most network adequacy provisions in the final rule apply beginning with the 2025 benefit year, with some provisions phased in over the 2025-2026 period to give plans time to adjust contracting and operational processes.

Plans should note that CMS typically applies final rule provisions to benefit year submissions filed in the spring preceding the benefit year. For 2025 benefit year, the final rule applied to network adequacy submissions filed in spring 2024. Plans that submitted 2025 benefit year attestations before the final rule's April publication date received transition guidance from CMS, but any resubmissions or updates needed to comply with the final rule were due on the standard amended submission timeline.

The practical consequence is that network ops teams cannot wait for the final rule publication to begin network build and contracting. The proposed rule — published five months before the final rule — is the operational signal that teams should use to begin adjusting provider recruitment plans, contracting templates, and adequacy modeling tools.

Updated Time-Distance Thresholds for Specific Specialties

The 2024 final rule updated maximum time-distance thresholds for several specialty categories that CMS identified as having persistent access gaps in prior benefit years. The revisions tightened urban and suburban thresholds for a subset of high-demand specialties while leaving rural and frontier standards largely unchanged, reflecting CMS's judgment that rural access constraints are supply-driven rather than addressable through tighter standards.

The specialties with updated urban thresholds in the 2024 final rule include oncology, cardiology, endocrinology, and nephrology. For urban counties, the maximum drive time for these specialties was reduced from 30 minutes to 25 minutes, with corresponding distance thresholds updated from 15 miles to 12 miles. For suburban counties, the thresholds moved from 45 minutes / 25 miles to 40 minutes / 22 miles. These changes are modest in absolute terms but operationally significant in markets where specialist density is thin.

CMS also added rheumatology and pulmonology to the list of required specialty categories for urban and suburban counties. Prior to the 2024 rule, these specialties were not required adequacy categories for all plans — they were evaluated under the general specialist adequacy standard rather than specialty-specific thresholds. Plans that previously met adequacy without specifically contracting rheumatologists and pulmonologists in urban and suburban markets now need to ensure coverage for these categories explicitly.

Ophthalmology access standards were restructured to distinguish between comprehensive ophthalmologists and retinal specialists. Retinal specialists now carry their own maximum threshold separate from general ophthalmology, reflecting the importance of this specialty for the Medicare population. Plans in markets where retinal specialist supply is limited should begin recruitment and contracting early in the benefit year cycle.

Appointment Wait-Time Standards

The 2024 final rule introduced appointment wait-time standards as a required adequacy element for the first time. Prior adequacy rules focused exclusively on geographic access — whether contracted providers were within time-distance threshold of members. The 2024 rule adds a temporal access dimension: even if a provider is geographically available, members must be able to obtain appointments within specified timeframes.

The new wait-time standards require that routine primary care appointments be available within ten business days for non-urgent needs, and that urgent care appointments be available within twenty-four hours. Specialist appointment wait times are set at thirty calendar days for non-urgent referrals. Plans are required to monitor appointment availability through annual provider directory audits and periodic secret shopper surveys, and to document their monitoring methodology in their network adequacy attestation.

The operational challenge is significant. Wait-time standards require plans to actively monitor appointment availability across their contracted network — not just verify that providers are contracted and geographically located within threshold. Plans that rely on static directory attestations from providers must upgrade their monitoring infrastructure to conduct actual appointment availability testing on a schedule that satisfies CMS's documentation requirements.

Plans operating in markets with high provider demand and thin panel capacity — particularly in behavioral health and primary care in suburban and rural counties — face the most difficult compliance path on wait-time standards. A provider who is geographically adequate but routinely unavailable for new patient appointments within the required window is a compliance liability that geographic adequacy modeling alone would not have detected.

Telehealth Counting Rules Updates

The 2024 final rule codified and updated the rules for when plans may count telehealth providers toward network adequacy. This area of the rule generated the most substantive public comment, as plans had relied heavily on telehealth flexibility during the COVID-19 public health emergency and were uncertain about the post-PHE framework.

The final rule allows telehealth providers to count toward adequacy in three specific contexts: behavioral health for all county types, primary care for rural and frontier counties where physical provider supply cannot meet threshold, and certain specialist categories in frontier counties where CMS has determined that physical provider supply is structurally inadequate. For all other contexts, telehealth providers may not substitute for physical provider relationships in adequacy calculations.

This is a meaningful restriction for plans that had built broad telehealth-dependent adequacy strategies. Plans counting virtual-only primary care providers in urban or suburban markets to fill adequacy gaps must replace those virtual providers with physically-located contracted providers or demonstrate eligibility for an exception. The transition period for plans to come into compliance with the new telehealth counting rules runs through the end of 2025, with full compliance required for 2026 benefit year submissions.

The codification of telehealth as a permanent adequacy tool in behavioral health is a significant policy development in the other direction. Plans that had been uncertain whether telehealth behavioral health providers would count on a long-term basis can now build telehealth behavioral health access into their standard adequacy framework with confidence, rather than treating it as a PHE-era flexibility of uncertain duration.

Behavioral Health Adequacy Changes

Behavioral health adequacy was substantially restructured in the 2024 final rule, reflecting CMS's recognition that mental health and substance use disorder access remains among the most persistent adequacy challenges across the Medicare Advantage market. The rule introduces a separate behavioral health adequacy section with its own specialty categories, time-distance standards, and monitoring requirements.

The new behavioral health adequacy framework distinguishes between psychiatry, licensed clinical social work, licensed professional counseling, and substance use disorder treatment — each with its own required adequacy thresholds rather than being collapsed into a single behavioral health category. This disaggregation increases compliance complexity but reflects the clinical reality that members needing psychiatric medication management have different access needs than members needing outpatient counseling.

Substance use disorder treatment providers, including opioid treatment programs and intensive outpatient programs, are now explicitly required adequacy categories in all county types. Prior adequacy rules treated SUD treatment as a component of the general behavioral health category; the 2024 rule makes it a standalone required category with its own time-distance standards. Plans that had relied on general behavioral health coverage to satisfy SUD access requirements need to verify whether their contracted panel specifically includes SUD treatment providers in each county.

Telehealth's codified role in behavioral health adequacy (discussed above) is closely linked to the behavioral health restructuring. CMS's decision to permanently allow telehealth to count toward behavioral health adequacy across all county types reflects both the supply constraints in this specialty and the demonstrated clinical acceptability of telehealth delivery for many behavioral health services.

Provider Directory Update Frequency Requirements

The 2024 final rule tightened provider directory accuracy requirements significantly. Prior rules required plans to maintain accurate directories but gave limited specificity on update frequency. The 2024 rule establishes a maximum seventy-two hour window for processing provider status changes — plans must update their online provider directory within three business days of receiving notification of a provider's change in status, including terminations, address changes, panel closures, and accepting-new-patients status changes.

Plans are also required to conduct quarterly outreach to all contracted providers to verify directory accuracy, and to document the results of those outreach efforts. The documentation requirement means plans need a provider data management system capable of recording verification dates and responses at the individual provider level — spreadsheet-based directory management is no longer an operationally viable approach given the audit trail requirements.

The practical consequence of the seventy-two hour update window is that plans must have real-time or near-real-time notification workflows from their contracting and credentialing systems to their directory management platform. A provider termination that sits in a contracting system for a week before the directory team learns of it and updates the public directory is a compliance violation under the 2024 final rule.

CMS indicated that directory accuracy will be an audit priority in benefit year 2025 and 2026 oversight cycles, and that plans with material directory accuracy deficiencies identified through secret shopper programs or beneficiary complaints may be subject to civil monetary penalties. Plans should treat the seventy-two hour update requirement as a hard operational standard, not an aspirational goal.

Transition Period and Compliance Deadlines

CMS structured the 2024 final rule compliance timeline to recognize that some provisions require meaningful operational changes that cannot be implemented immediately. The rule distinguishes between provisions that applied beginning with the 2025 benefit year and provisions with phased implementation through 2026.

The specialty threshold changes, new required specialty categories, and behavioral health restructuring all applied beginning with 2025 benefit year submissions. Plans that had already completed their 2025 benefit year network submissions before the final rule published received a cure period — CMS notified affected plans of any discrepancies between their submitted network and the final rule requirements and allowed submission updates on a shortened timeline.

The appointment wait-time standards have a phased implementation. For benefit year 2025, plans are required to have a wait-time monitoring methodology in place and to document it in their adequacy attestation, but CMS is not applying numeric wait-time compliance thresholds for the 2025 benefit year. Full numeric compliance with wait-time standards, including the ten-business-day primary care and thirty-calendar-day specialist thresholds, applies beginning with benefit year 2026 submissions.

The provider directory update frequency requirement and the telehealth counting rule revisions both applied beginning January 1, 2025. Plans that required operational changes to meet the seventy-two hour directory update standard had the period between the April 2024 final rule publication and January 1, 2025 to implement those changes. CMS indicated that it would not initiate enforcement actions under the directory accuracy provisions for the first half of 2025 absent egregious violations, giving plans additional runway to complete systems changes.