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How to Interpret NEC and NOS in ICD-10
Published on Mon May 07, 2012
Question:
I was looking at the ICD-10-CM manual, and I noticed NEC and NOS. I know they stand for Not Elsewhere Classifiable (NEC) and Not Otherwise Specified (NOS), but how should I use them in ICD-10-CM?California Subscriber
Answer:
Like ICD-9, the NEC (Not Elsewhere Classifiable) abbreviation contains codes for "other" types of specified conditions that haven't already been classified. An example is H26.8 (
Other specified cataract).
When your physician doesn't clearly specify the condition, you can use a NOS (Not Otherwise Specified) code -- although payers usually frown upon this process. An example is H40.9 (Unspecified glaucoma).