Transparency in Coverage Machine-Readable Files: What Self-Insured Employers Must Do and What the Data Shows

What Self-Insured Employers Must Publish

The federal Transparency in Coverage (TiC) rule, which went into effect January 1, 2024, requires self-insured health plans to publish two critical machine-readable files:

1. The In-Network Rates File

This file contains negotiated rates between your plan and in-network providers. The data includes:

• Specific negotiated rates by provider and service code (CPT, HCPCS, DRG)
• Rates broken down by patient responsibility (copays, coinsurance, deductibles)
• Plan information, billing codes, and provider identifiers
• Geographic variations in pricing for the same service

The file updates monthly and must be publicly available within 30 days of the plan year start.

2. The Allowed Amount File

This file shows the maximum amount your plan will pay for out-of-network services, based on recognized amounts, fee schedules, or contracted rates in other plans. It applies to services where an employee uses an out-of-network provider.

What This Data Actually Reveals

The machine-readable files expose significant pricing inconsistencies that have remained hidden in traditional plan documents:

Price variation for identical services: A knee MRI costs $850 at one hospital and $2,100 at another facility 10 miles away—for the same service quality and outcome.

Billing code bundling differences: Some providers bill a comprehensive cardiac workup as a single code; others split it into 15 separate charges, changing the price structure entirely.

Geographic arbitrage: Hospitals in lower-cost areas negotiate 30-40% lower rates than comparable facilities in adjacent metropolitan regions.

Specialist markup patterns: Orthopedic surgeons in certain networks charge 2.5x more for the same arthroscopic procedure compared to surgeons in competing networks within your market.

As of mid-2025, insurers have published approximately 40+ million rate records across major plans. Employers analyzing this data report finding:

• 15-25% cost variation for the same procedure within their local markets
• Out-of-network rates inflated 40-60% above in-network negotiated amounts
• Preventive services misclassified as non-preventive, triggering patient cost-sharing

How Self-Insured Plans Must Comply

File hosting: Your files must be publicly accessible on your website, typically in a dedicated folder (often labeled /transparency/ or /pricing-data/). Carriers handling your claims administration usually manage this publication for you, but your benefits team must verify it's happening.

Format standards: Files are published in JSON format. They're machine-readable—designed for automated analysis by brokers, consultants, and health tech vendors, not for manual human review.

Update frequency: Monthly updates are required. Files become outdated quickly as providers change rates or networks shift. Verify your files are genuinely refreshing monthly; some plans have published stale data repeatedly.

Plan identification: Each file must identify your specific plan. If you offer multiple plans (PPO, HMO, HDHP variants), each plan needs its own files.

Timeline: The CMS has enforced compliance through audits and penalties starting in 2024. Plans failing to publish or publishing incomplete files face penalties, though enforcement has been inconsistent across issuers.

How to Actually Use This Data

Most employers haven't accessed their own files yet. Here's how to extract real value:

Immediate step: Obtain your files

Contact your health plan administrator or broker directly. Ask for:

• The public URL where your files are hosted
• Confirmation the files were updated this month
• Technical documentation on file structure and field definitions

Analyze price variation in your market

Use a health data vendor (Castlight, Change Healthcare, or Artemis Health offer TiC file analytics) or work with your broker to:

• Identify the top 20 procedures employees use most frequently
• Map price variation for these procedures across your network
• Benchmark your negotiated rates against regional averages
• Calculate total plan spend if employees migrate toward high-cost providers

A typical finding: 20% of your network providers represent 60% of your spend, yet charge 30-50% more than alternatives for common procedures.

Inform employee cost-sharing decisions

Use this data to:

• Educate employees about specific price differences before they schedule procedures
• Identify preferred providers within each specialty that charge 15-30% less
• Build targeted disease management programs around low-cost, high-quality providers
• Design incentive structures that reward lower-cost provider utilization

Renegotiate rates

Self-insured employers have direct influence over negotiated rates. Armed with TiC data, you can:

• Challenge outlier provider rates with objective evidence of comparable pricing
• Request "most-favored customer" terms—locking rates below the 75th percentile in your market
• Consolidate volume to 2-3 preferred providers, using TiC data to justify rate reductions of 10-20%

Bottom Line

Transparency in Coverage files are mandatory, but compliance doesn't equal optimization. Your files are public—your competitors and their brokers are likely analyzing them. You should be too.

Start here: Request your TiC files this week. Have your broker pull your top 20 procedures and show you the price variation. One surgical procedure with avoidable 30% cost variation, multiplied across 100-500 employees, is typically worth $200,000-$1.2 million annually in preventable spend. The data is there. Use it.