Summary & Overview
HCPCS G9891: MDPP Expanded Model Session Reporting
HCPCS Level II code G9891 is a reporting-only code that documents an MDPP expanded model (EM) session furnished by the billing supplier and counted toward an attendance performance goal for a payable MDPP expanded model HCPCS code. Nationally, the code matters because it supports program performance tracking and administrative reporting for MDPP expanded model services, enabling payers and suppliers to document session-level participation that contributes to outcome-based program metrics. Key payers covered in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare.
Readers will learn what HCPCS Level II code G9891 represents, the clinical and administrative context of its use, and the typical service and site where the code applies. The publication provides an overview of billing purpose and reporting intent, highlights common modifiers and payer considerations where available, and describes what information is available versus what is not provided in the input. Data not available in the input includes payer-specific reimbursement rates, associated taxonomies, and ICD-10 diagnoses tied to this reporting code. The focus is national in scope and centers on documentation and program attendance reporting rather than direct reimbursement guidance.
Billing Code Overview
HCPCS Level II code G9891 is a reporting-only line-item used to document a delivered MDPP expanded model (EM) session that counts toward the attendance performance goal for a payable MDPP expanded model HCPCS code. The code indicates a session furnished by the billing supplier under the MDPP expanded model and is submitted on a claim as a session-level entry for tracking achievement of program attendance metrics.
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Service type: MDPP expanded model (EM) session reporting
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Typical site of service: Community-based or outpatient program settings where MDPP expanded model sessions are delivered (reported on the billing supplier's claim)
Clinical & Coding Specifications
Clinical Context
A 58-year-old patient with prediabetes is enrolled in a Medicare Diabetes Prevention Program (MDPP) expanded model (EM) delivered by a certified supplier. The patient attends a series of structured group sessions focused on lifestyle modification, weight loss, and physical activity. The billing supplier furnishes an individual MDPP session as part of the payable MDPP EM service. The supplier reports the session as a line-item using G9891 to document that the single session was furnished by the billing supplier and counted toward the attendance performance goal for the payable MDPP EM HCPCS code.
Workflow:
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The patient schedules and attends the MDPP education/support session at the supplier’s outpatient setting (community center or clinic-based program).
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The MDPP coach documents attendance, session content, duration, and participant engagement in the patient record.
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The billing team includes the payable MDPP EM HCPCS code on the claim for the model episode and appends
G9891line-item(s) for individual sessions furnished by the billing supplier that contribute to the attendance performance metric. -
Applicable modifiers or supplier-specific identifiers are appended as required by the payor for payment adjudication and performance reporting.
Coding Specifications
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