Miscellaneous Disorders of Nutrition, Metabolism, Fluids and Electrolytes with MCC: Inpatient Reimbursement Overview
DRG 640 encompasses miscellaneous disorders of nutrition, metabolism, fluids and electrolytes with a Major Complication or Comorbidity; it includes severe electrolyte disturbances and complex metabolic or nutrition-related conditions requiring inpatient care. This Diagnosis-Related Group matters for inpatient reimbursement because the Major Complication or Comorbidity designation increases case severity and typically results in higher Medicare payment compared with lower-severity groupings.
Customize your policy alerts
Sign up for drg 640 policy alerts
Get alerted when payer policies referencing 640 are released or updated.
Monitor payer policy activity
DRG 640 Overview
DRG 640 covers inpatient cases grouped to miscellaneous disorders of nutrition, metabolism, fluids and electrolytes that include a Major Complication or Comorbidity. Typical clinical conditions include severe electrolyte disturbances, complex metabolic derangements, and significant nutrition-related complications that require hospital-level medical management and monitoring. This Diagnosis-Related Group is important for Medicare payment because presence of a Major Complication or Comorbidity generally increases resource use and results in higher reimbursement relative to non-major complication or comorbidity groupings. Accurate clinical documentation and coding determine whether a case is assigned to this Diagnosis-Related Group and thus affect payment.