Pediatric Coding Alert

Reader Questions:

Turn to 271.8 for 3-MCC Diagnosis

Question: What is the best diagnosis for 3-MCC (3-Methylcrotonyl-Coenzyme A carboxylase deficiency)?

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Answer: Your best choice is 271.8 (Other specified disorders of carbohydrate transport and metabolism).

3-MCC is an uncommon, inherited disorder in which the body is unable to process certain proteins correctly because of a shortage of leucine. Infants with 3-MCC deficiency appear normal at birth but develop signs and symptoms in infancy or early childhood.

Characteristic features of 3-MCC include feeding difficulties, recurrent episodes of vomiting or diarrhea, excessive tiredness, and weak muscle tone.

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