Summary & Overview
HCPCS G9873: MDPP First Core Session Attendance
HCPCS Level II code G9873 identifies the first attended core session of the Medicare Diabetes Prevention Program (MDPP) under the Expanded Model. The code captures a roughly one-hour, CDC-approved Diabetes Prevention Program core session furnished by an MDPP supplier during months 1–6 of the MDPP services period. Nationally, this code matters as Medicare expands structured lifestyle-intervention coverage aimed at reducing incidence of type 2 diabetes among beneficiaries, aligning payment and reporting with preventive public health goals. Key payers in payer-specific analyses include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare.
Readers will learn the clinical and programmatic context of G9873, how it maps to MDPP service delivery, and what to expect in terms of typical sites of service and session structure. The publication provides benchmarks and comparative policy context where available, highlights payer coverage patterns and potential billing considerations, and outlines the role of G9873 within broader MDPP reporting and quality measurement frameworks. Data limitations and unavailable input fields are noted where relevant.
Billing Code Overview
HCPCS Level II code G9873 denotes the first Medicare Diabetes Prevention Program (MDPP) core session attended by a beneficiary under the MDPP Expanded Model (EM). A core session is an MDPP service furnished by an MDPP supplier during months 1 through 6 of the MDPP service period, is approximately one hour in length, and adheres to a CDC-approved Diabetes Prevention Program curriculum for core sessions.
Service type: Preventive behavioral health / lifestyle intervention session
Typical site of service: Community-based or outpatient group setting, virtual delivery, or other MDPP-approved delivery locations provided by an MDPP supplier
Data not available in the input for associated taxonomies, ICD-10 diagnoses, and related codes.
Clinical & Coding Specifications
Clinical Context
A 54-year-old patient with prediabetes (fasting glucose 110–125 mg/dL and HbA1c 5.7%–6.4%) is enrolled in the Medicare Diabetes Prevention Program (MDPP) Expanded Model. The patient attends the first MDPP core session during month 1 of the MDPP services period. The core session is approximately one hour, follows a CDC-approved DPP core curriculum, and is furnished by an MDPP supplier (for example, a licensed lifestyle coach or a recognized MDPP organization) in an outpatient community wellness center or virtual telehealth setting.
Workflow:
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Referral or eligibility verification by a primary care clinician or Medicare claim review.
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Enrollment and initial scheduling with the MDPP supplier; beneficiary consent and baseline data collection (weight, height, baseline HbA1c or fasting glucose if available, and personal goals).
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Delivery of the one-hour CDC-approved core session covering lifestyle change curriculum topics (nutrition, physical activity goals, behavioral strategies).
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Documentation in the MDPP supplier record: attendance, session content, duration (~60 minutes), coach name and taxonomy, beneficiary identifiers, and any accommodations (e.g., virtual platform).
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Billing: supplier submits HCPCS Level II code
G9873for the first MDPP core session under the MDPP Expanded Model, attaching appropriate modifier(s) as clinically applicable and maintaining supporting documentation for Medicare audit purposes.