NCCI Version 9.2, which went into effect July 1, bundles G0270 (Medical nutrition therapy; reassessment and subsequent intervention[s] following second referral in same year for change in diagnosis, medical condition or treatment regimen [including additional hours needed for renal disease], individual, face to face with patient, each 15 minutes) and G0271 (Medical nutrition therapy; reassessment and subsequent intervention[s] following second referral in same year for change in diagnosis, medical condition, or treatment regimen [including additional hours needed for renal disease], group [2 or more individuals], each 30 minutes) into general ophthalmological services codes 92002-92014 and most E/M codes.
If your ophthalmologist provides a comprehensive established patient eye exam (92014, Ophthalmological services: medical examination and evaluation, with initiation or continuation of diagnostic and treatment program; comprehensive, established patient, one or more visits) for a diabetic Medicare patient, and he also provides an initial medical nutritional therapy service (G0270) during that same visit, then you cannot separately report G0270.
Remember the rules about "bundled" codes: A bundle is the commonly used term to describe a pair of codes, one of which represents the comprehensive code and the other is the component code. NCCI considers the service represented in the component code included in and not separately billable from the service represented by the component code. NCCI outlines the rationale for bundling component codes into comprehensive codes: