Wiki ICD code question

[debdebc]

I have a patient who is 28 days old and was diagnosed with Intestional malabsorption, diarrhea unspecified, and diaper dermatitis but insurance is denying because one of these diagnoses is not age related. I am thinking it is the intestional malabsorption and if this is what would you diagnose with?

 

[irene quast]

You might consider P78.89 'Other specified perinatal digestive system disorders'...unless you can get further definition as to the type of malabsorption.