Medical Billing Terms Q-R: Rendering Provider, Referral and Replacement Claim

A rendering provider is the clinician who performs the service listed on a claim. This page defines the rendering provider with the terms from redetermination to retroactive denial, including referring provider, replacement claim, RVU and residential treatment. MCM South Medical Billing Service, LLC works only in mental and behavioral health billing.

Last reviewed: October 10, 2026Sources linked at each term

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Billing Terms Glossary slide, Terms Q-R: Rendering Provider - MCM South Medical Billing Service, LLC

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On this page (16 terms)

Redetermination
Referral
Referring Provider
Refund Request
Regional Accountable Entity (RAE)
Rejection Report
Relative Value Unit (RVU)
RelayHealth
Remittance Advice (ERA)
Remote Patient Monitoring (RPM)
Rendering Provider
Replacement Claim
Research-Supported Psychological Treatment
Residential Treatment
Retro Authorization
Retroactive Denial

How to use these Rendering Provider definitions

Use this page as a quick reference for Rendering Provider, from Redetermination to Retroactive Denial. Each entry gives a plain definition, why it matters to a mental health practice, and an official source. When a rule changes by payer or state, the entry says so, so confirm Rendering Provider details with the payer before you bill.

Checklist: put the rendering provider definitions to work

Redetermination: Knowing the Medicare appeal levels prevents skipping steps.
Referral: Missing a required referral can deny the claim.
Referring Provider: Some payers, plans, and programs require the referring provider's NPI to pay the claim.
Refund Request: Deadlines and dispute rights are short, so requests need a fast, documented response.

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Redetermination

General (all payers)

Also called Medicare redetermination; first-level Medicare appeal

Definition: The first level of appeal in Original Medicare, decided by the MAC.
Why it matters: Knowing the Medicare appeal levels prevents skipping steps.
Illustrative example: A provider requests redetermination of a denied Part B claim.

Reference sourceCMS (Centers for Medicare & Medicaid Services)CMS Medicare Learning Network (MLN)checked 10/9/26

CategoriesDenials & Appeals Medicare & Medicaid Terms

Referral

General (all payers)

Also called PCP referral; referral requirement

Definition: An authorization from a primary care provider or plan for a member to see a specialist, required by some plans.
Why it matters: Missing a required referral can deny the claim.
Illustrative example: A member's HMO requires a PCP referral before a psychiatry visit.

Reference sourceCMS (Centers for Medicare & Medicaid Services)checked 10/9/26

CategoriesEligibility & Benefits Prior Authorization Terminology

Referring Provider

General (all payers)

Also called referring physician; ordering provider

Definition: The clinician who refers a patient to another provider, sometimes required on the claim.
Why it matters: Some payers, plans, and programs require the referring provider's NPI to pay the claim.
Illustrative example: A Medicaid plan requires the PCP's NPI as referring provider.

Reference sourceCMS (Centers for Medicare & Medicaid Services)checked 10/9/26

CategoriesProvider Data Management Terms Claims Processing

Refund Request

General (all payers)

Also called overpayment refund request; payer refund letter

Definition: A payer's written demand for return of a payment it believes was in error.
Why it matters: Deadlines and dispute rights are short, so requests need a fast, documented response.
Illustrative example: A practice receives a refund letter with a 30-day response window.

Reference sourceCMS (Centers for Medicare & Medicaid Services)checked 10/9/26

CategoriesPayment & Reimbursement

Regional Accountable Entity (RAE)

Medicaid (state-specific)

Also called Colorado RAE; Accountable Care Collaborative

Definition: A Colorado Health First (Medicaid) entity that manages regional care coordination and behavioral health capitation for members in a region.
Why it matters: Colorado Medicaid behavioral health billing and contracts run through the RAE for the member's region.
Illustrative example: A Colorado therapist contracts with the RAE for the region where members live.

Reference sourceMedicaid.govchecked 10/9/26

CategoriesMedicare & Medicaid Terms BCBS, UHC & Commercial Payer Terms

Rejection Report

General (all payers)

Also called clearinghouse rejection report; error report

Definition: A report from a clearinghouse or payer that lists rejected claims and the reason for each.
Why it matters: Daily review of rejection reports catches problems before timely filing deadlines.
Illustrative example: A biller works the rejection report each morning.

Reference sourceX12checked 10/9/26

CategoriesEDI & Clearinghouse Terms Claims Processing

Relative Value Unit (RVU)

General (all payers)

Also called RVU; work RVU; wRVU

Definition: A measure of the resources a service requires. Under Medicare, RVUs for work, practice expense, and malpractice, combined with a conversion factor, set payment.
Why it matters: Practices also use RVUs to track productivity.
Illustrative example: A practice tracks work RVUs per clinician for productivity reports.

Reference sourceCMS (Centers for Medicare & Medicaid Services)CMS Physician Fee Schedulechecked 10/9/26

CategoriesPayment & Reimbursement Revenue Cycle Metrics

RelayHealth

General (all payers)

Also called Relay Health

Definition: A legacy health care technology and clearinghouse brand associated with earlier McKesson and Change Healthcare operations. Listed for reference; not an endorsement or partnership.
Why it matters: Older payer documents may still reference it.
Illustrative example: A payer ID list mentions RelayHealth.

Related termsChange Healthcare Clearinghouse

Reference sourceChange Healthcarechecked 10/9/26

CategoriesEDI & Clearinghouse Terms

Remittance Advice (ERA)

General (all payers)

Also called remittance advice; ERA; electronic remittance advice; 835

Definition: An explanation of how a payer processed a claim, showing payments, adjustments, and denial reasons; the electronic version is the ERA (835).
Why it matters: Posting correctly from the ERA is the core of accurate accounts receivable.
Illustrative example: A biller posts payment and adjustments from the ERA.

Reference sourceX12checked 10/9/26

CategoriesPayment & Reimbursement EDI & Clearinghouse Terms

Remote Patient Monitoring (RPM)

General (all payers)

Also called RPM

Definition: Use of devices to collect patient health data at home and send it to a provider, with specific billing codes.
Why it matters: Less common in behavioral health but present in integrated care.
Illustrative example: A clinic bills RPM for a patient's device readings where covered.

Related termsTelehealth Care Management

Reference sourceCMS (Centers for Medicare & Medicaid Services)checked 10/9/26

CategoriesTelehealth Terms

Rendering Provider

General (all payers)

Also called treating provider; performing provider

Definition: The individual clinician who actually delivered the service being billed.
Why it matters: Payers credential and pay based on the rendering provider's status.
Illustrative example: A supervised associate may not be an allowed rendering provider under some payer policies.

Reference sourceCMS (Centers for Medicare & Medicaid Services)checked 10/9/26

CategoriesProvider Data Management Terms Claims Processing

Replacement Claim

General (all payers)

Also called frequency code 7 claim

Definition: A corrected claim that replaces an earlier claim, sent with the original claim number.
Why it matters: Ensures the payer updates the original instead of treating it as a duplicate.
Illustrative example: A biller sends a replacement claim with the payer claim number in the correct field.

Reference sourceX12 NUBCchecked 10/9/26

CategoriesClaims Processing

Research-Supported Psychological Treatment

General (all payers)

Also called empirically supported treatment; EST; evidence-based psychological treatment; Division 12 list

Definition: A research-supported psychological treatment is a psychological treatment for which studies show benefit for a condition. The Society of Clinical Psychology keeps lists and rates the evidence. Its archived labels are strong, modest, and controversial, and its current labels are very strong, strong, weak, and insufficient evidence.
Why it matters: The rating shows how much research backs a treatment for a condition. It does not decide payer coverage, but it can support a medical necessity argument.
Illustrative example: A psychologist cites the evidence level for a treatment in a medical necessity letter.

Reference sourceSociety of Clinical Psychology, Psychological Treatments Society of Clinical Psychology (Division 12, American Psychological Association)checked 10/9/26

CategoriesBehavioral Health Specific Terms Quality & Risk Adjustment Terms

Residential Treatment

General (all payers)

Also called residential treatment center; RTC

Definition: Live-in behavioral health or substance use treatment in a non-hospital setting.
Why it matters: Billed on institutional claims with authorization and level-of-care review.
Illustrative example: A payer authorizes residential days with concurrent review.

Reference sourceSAMHSAchecked 10/9/26

CategoriesBehavioral Health Specific Terms

Retro Authorization

General (all payers)

Also called retroactive authorization; retro auth; after-the-fact authorization

Definition: A request for authorization after a service was delivered, allowed by some payers in limited circumstances.
Why it matters: Not universally accepted, so it is not a plan to rely on.
Illustrative example: A payer accepts a retro authorization request within a short window after an urgent service.

Reference sourceCMS (Centers for Medicare & Medicaid Services)checked 10/9/26

CategoriesPrior Authorization Terminology

Retroactive Denial

General (all payers)

Also called retro denial; post-payment denial

Definition: A denial applied after a claim was initially paid, often due to eligibility, authorization, or audit findings.
Why it matters: Leads to takebacks and requires quick review of appeal rights.
Illustrative example: A claim is paid then denied months later for a lapsed authorization.

Reference sourceCMS (Centers for Medicare & Medicaid Services)checked 10/9/26

CategoriesDenials & Appeals

Quick answer: Rendering Provider

What is a rendering provider?

The rendering provider is the individual clinician who actually delivered the service being billed. Payers credential and pay based on the rendering provider's status.

Frequently asked questions: Rendering Provider

What is a referral in medical billing?

A referral is an authorization from a primary care provider or plan for a member to see a specialist, required by some plans. Missing a required referral can deny the claim.

What is a replacement claim?

A replacement claim is a corrected claim that replaces an earlier claim, sent with the original claim number. It ensures the payer updates the original instead of treating it as a duplicate.

What is a redetermination?

Redetermination is the first level of appeal in Original Medicare, decided by the MAC. Knowing the Medicare appeal levels prevents skipping steps.

Related resources

Where MCM South works

MCM South serves psychotherapists and psychiatrists in ten states: Georgia, Massachusetts, Connecticut, Texas, Florida, New York, Colorado, Tennessee, North Carolina and Illinois.

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