Physician referrals for nutrition services.
D000328:Adult; D004045:Dietary Services / Q000191:economics / Q000706:statistics & numerical data*; D005260:Female; D006801:Humans; D007349:Insurance, Health, Reimbursement; D008297:Male; D015596:Nutrition Assessment; D010347:Patient Care Planning; D012017:Referral and Consultation / Q000706:statistics & numerical data*; D014481:United States