If you haven't called in to your insurer to speak with an actual rep, you'd be surprised at how many claims automatically deny due to a computer programming glitch (i.e. automatic denial). Half the calls I make result in the rep stating that the computer automatically denies a claim and a followup will require a phone call. For example, I just called in to Molina this morning and explained that 29075 needs only a laterality modifier as the EOB stated that modifier is missing. The rep told me she didn't know why the computer always does this but that she will forward the bill to their billing department for reconsideration. At least the hold time was less than a minute. Another example are claims for multiple body parts which require a different case number per workman's comp regulations that are evaluated on the same day. Any multiple claims for the same patient done on the same day regardless of different case numbers will be automatically denied by the DOL as duplicates until you either call in to a rep or send in an adjustment request form.
That said, S codes are acceptable as primary diagnoses. Just make sure they are not unspecified and/or the laterality matches for the CPT code assigned to the procedure rendered just as Lashel said.
Peace
@_*