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ICD10 CM Case sensitive

dmclay

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Are the filler and alpha characters in the ICD10 cm codes upper or lower case? Is there a rule ?
example
T47.1x3a
T47.1X3A
T47.1x3A
 

dmclay

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Thank you, I have an Ingenix Draft 2011 book and could not find it in the guidelines. Can you tell me the source of the guidelines you are referencing?
 

mitchellde

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I am sorry my bad, it was not from the guidelines it was thru a different source I found that , but it was either the AAPC or CMS or CDC that I found that since those are the only resource I use for the info.
What I found was a chart that listed side by side the differences between ICD-9 and 10 and it was in this chart that stated the Alphas are not case sensitive.
 
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