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Eligibility & Authorization

What is Eligibility Response (271)?

Also known as: 271

Quick answer

The X12 271 electronic transaction a payer sends back in response to a 270 eligibility inquiry, containing details about a patient's coverage status, plan benefits, copay, deductible, and coinsurance information.

Written & reviewed by the Unlimited Systems Revenue Cycle TeamLast reviewed May 2026

Key takeaways

  • Eligibility Response is a eligibility & authorization concept in healthcare revenue cycle management.
  • The X12 271 electronic transaction a payer sends back in response to a 270 eligibility inquiry, containing details about a patient's coverage status, plan benefits, copay, deductible, and coinsurance information.
  • A leading root cause of preventable denials when missed

Where Eligibility Response fits in the revenue cycle

Eligibility Response sits within the front end of the revenue cycle, before a service is rendered. It is part of financial clearance, confirming a patient's coverage and securing payer approval before care is delivered.

Eligibility Response is also referred to as 271. You'll encounter it on payer communications, billing reports, and in conversations between front-office, coding, and accounts-receivable teams.

Why Eligibility Response matters for your practice

Most denials trace back to an eligibility or authorization problem that could have been caught before the visit. Verifying coverage and obtaining the right authorizations up front is the single highest-leverage way to prevent downstream denials, protect patient relationships, and keep treatment on schedule.

  • Happens before or at the point of service
  • A leading root cause of preventable denials when missed
  • Protects both revenue and the patient financial experience
  • Often payer- and plan-specific, so accuracy matters

Eligibility Response in practice

Knowing what Eligibility Response means is only useful if it changes what your team does. In a modern revenue cycle, that means catching issues related to eligibility & Authorization earlier, documenting and coding them correctly, and using technology to flag exceptions automatically rather than discovering them after a claim is denied.

This is exactly where a specialty-built revenue cycle platform earns its keep: by encoding the rules behind terms like Eligibility Response directly into the workflow, so clean claims go out the first time and your team works by exception instead of chasing problems after the fact.

Eligibility Response: frequently asked questions

What is Eligibility Response?

The X12 271 electronic transaction a payer sends back in response to a 270 eligibility inquiry, containing details about a patient's coverage status, plan benefits, copay, deductible, and coinsurance information.

What does Eligibility Response mean in medical billing?

In medical billing, Eligibility Response falls under Eligibility & Authorization. It is part of financial clearance, confirming a patient's coverage and securing payer approval before care is delivered.

Why is Eligibility Response important in the revenue cycle?

Most denials trace back to an eligibility or authorization problem that could have been caught before the visit. Verifying coverage and obtaining the right authorizations up front is the single highest-leverage way to prevent downstream denials, protect patient relationships, and keep treatment on schedule.

Is Eligibility Response known by any other names?

Yes, Eligibility Response is also referred to as 271.

Authoritative sources

For the most current rules and requirements, consult the primary sources that govern this area of healthcare billing:

Unlimited Systems Revenue Cycle Team
RCM & medical billing specialists

Unlimited Systems has built specialty revenue cycle technology for healthcare providers for two decades. This glossary is maintained by our in-house team of billing, coding, and reimbursement specialists.

Put Eligibility Response to work in your practice

See how the Unlimited Systems platform automates clean claims, denial management, eligibility verification, and more across your revenue cycle.

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