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Medicare Billing: CMS-1450 & 837I

Adjustments

An adjustment request bill is a correction to a claim previously processed after the provider has gotten notification on a Remittance Advice (RA), as we’ll discuss more in Lesson 6. If a particular item or service was left off the initial claim, you can submit an adjustment. You must submit adjustment claims before the time limitation for filing the initial claim expires.

Under inpatient PPS, you must submit adjustment bills where errors occur that:

  • Result in a change in the Diagnosis Related Group (DRG) for hospitals or the Resource Utilization Group (RUG) for SNFs
  • Affect the deductible or use

CMS allows hospitals 60 days and SNFs 120 days from the date of the RA to submit these adjustments. If you find that previous errors have no effect on the DRG or RUG, then you’re not required to submit adjustment bills.