CurrentOptumPolicy N/A

Incident-to reimbursement for office/clinic services

Governs when services provided by Advanced Practice Health Care Providers or Nonphysician Providers in an office or clinic may be reported and reimbursed as 'incident-to' a Supervising Health Care Provider for Optum commercial and Individual Exchange plans.

Policy Summary

PayerOptum

PolicyIncident-to reimbursement for office/clinic services

Policy CodePolicy N/A

Change TypeNo material change

Effective DateN/A

Next Review DateDec 1, 2025

Key ActionReport incident-to services under the Supervising Health Care Provider's NPI; append SA modifier when billing Advanced Practice Health Care Provider services that meet incident-to criteria.

SourceLink

POLICY UPDATE CHANGES

No material clinical or coverage changes in this revision.

CMS1500claim form(s) this policy applies to

Commercial & IFPlines of business covered

Direct personalsupervision standard

SAbilling modifier guidance

Incident-to Coverage Criteria

Incident-to coverage criteria

Optum will consider incident-to services reimbursable if these specific criteria are met:

All of the following must be met:

ALL of the following

Service is an integral, although incidental, part of the Supervising Health Care Provider's services (commonly furnished in the office/clinic).
Service is commonly rendered without charge or included in the Supervising Health Care Provider's bill.
Service is of a type commonly furnished in the Supervising Health Care Provider's office or clinic.

Policy Summary

PayerOptum

PolicyIncident-to reimbursement for office/clinic services

Policy CodePolicy N/A

Change TypeNo material change

Effective DateN/A

Next Review DateDec 1, 2025

Key ActionReport incident-to services under the Supervising Health Care Provider's NPI; append SA modifier when billing Advanced Practice Health Care Provider services that meet incident-to criteria.

SourceLink

On This Page

Trek Health ingests and normalizes Transparency in Coverage data and payer policy updates to give provider organizations a clear view of how commercial reimbursement behaves across markets, payers, and services. Our platform transforms raw payer disclosures into structured intelligence that supports contract evaluation, payer negotiations, and service line strategy. By combining market benchmarks with ongoing policy visibility, Trek helps teams identify variability, risk, and opportunity in commercial reimbursement. The result is faster insight, stronger negotiating positions, and more informed financial decisions.

Reimbursement Conditions & Claim Submission

Billing Rule

Incident-to reimbursement condition — operational requirements

Optum will consider services reimbursable as "incident-to" when all of the following conditions are met: the service is an integral, although incidental, part of the Supervising Health Care Provider's services; it is commonly rendered without charge or included in the Supervising Health Care Provider's bill; it is of a type commonly furnished in the Supervising Health Care Provider's office or clinic; and it is provided by the Advanced Practice Health Care Provider or Nonphysician Provider under the Supervising Health Care Provider's direct personal supervision. Direct personal supervision means the Supervising Health Care Provider is physically present in the location of service and immediately available to provide assistance and direction for the entire time the Advanced Practice Health Care or Nonphysician Provider is performing services.

Services rendered by a Nonphysician Provider that meet the incident-to criteria should be reported under the Supervising Health Care Provider's NPI.
Services rendered by an Advanced Practice Health Care Provider that meet the incident-to criteria should be reported under the Supervising Health Care Provider's NPI with the SA modifier appended.

Documentation Required

Claim submission requirements

When services meet the incident-to criteria they should be billed under the Supervising Health Care Provider. Report services rendered by Nonphysician Providers under the Supervising Health Care Provider's NPI. Report services rendered by Advanced Practice Health Care Providers under the Supervising Health Care Provider's NPI and append the SA modifier. Ensure documentation demonstrates: the Supervising Health Care Provider's presence in the location of service during the encounter (direct personal supervision), the supervisory relationship, and that the service provided meets the "integral/incidental" and "commonly furnished" criteria. Retain records showing applicable state licensure and scope of practice for the rendering provider.

Bill under Supervising Health Care Provider's NPI for incident-to services.
Append SA modifier when billing for services rendered by Advanced Practice Health Care Providers reported under the supervising physician's NPI.
Maintain documentation evidencing direct personal supervision (Supervising Health Care Provider present and immediately available).
Retain documentation showing the service is commonly furnished in the supervising provider's office/clinic and is integral to the supervising provider's services.
Include any required forms or claim attachments per payer-specific instructions.

Key Definitions

Advanced Practice Health Care Provider

DefinitionAdvanced Practice Health Care Provider: a non-physician licensed by the state who may bill directly under applicable state law; examples include Physician Assistants (PA), Nurse Practitioners (NP), and Clinical Nurse Specialists (CNS).

LicensureState licensure required to practice and to bill directly where permitted by state law.

ExamplesSpecifically includes PA, NP, and Clinical Nurse Specialists (CNS).

Billing noteWhen services meet incident-to criteria and are furnished by an Advanced Practice Health Care Provider, they should be reported under the supervising physician's NPI with the SA modifier appended.

Supervising Health Care Provider

DefinitionSupervising Health Care Provider: a physician or an Advanced Practice Health Care Provider who has their own NPI and is responsible for supervising services rendered by an Advanced Practice Health Care or Nonphysician Provider.

ResponsibilityResponsible for oversight of services performed by supervised providers and ensuring supervision requirements (e.g., direct personal supervision) are met.

NPI requirementMust have their own NPI number used for billing when incident-to criteria apply (Nonphysician Provider services billed under the supervising provider's NPI).

Nonphysician Provider

DefinitionNonphysician Provider: auxiliary personnel acting under the supervision of a physician or Advanced Practice Health Care Provider, regardless of employment status (examples include nurses and medical assistants).

Employment statusApplies regardless of whether the individual is an employee, leased employee, or independent contractor of the physician or the legal entity that employs or contracts with the physician.

Inclusion noteNonphysician Providers may include Advanced Practice Health Care Providers when applicable.

Direct personal supervision

StandardDirect personal supervision means the Supervising Health Care Provider is present in the location of service and immediately available to provide assistance and direction throughout the time services are performed.

Operational detailSupervision requires on-site presence of the supervising provider for the duration of the service to ensure immediate availability for assistance and direction.

Relation to incident-toServices provided under this supervision standard may meet incident-to criteria when other coverage conditions are satisfied.

CPT	Policy references CPT and other coding guidelines for definitional purposes; does not guarantee reimbursement.
HCPCS	HCPCS referenced as resource.

OpenPayer

Incident-to reimbursement for office/clinic services

Incident-to Coverage Criteria

Referenced Coding Systems

Reimbursement Conditions & Claim Submission

Key Definitions