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Medicare Billing: 837I & Form CMS-1450

Loop 2300 HI/FLs 31-34

situationally required icon

You must use when an occurrence code is available to describe a situation reported on the claim.

Table 35: Loop 2300 HI/FLs 31-34 fields
Occurrence Code and DateSource
Enter a codes and associated dates defining specific events relating to the billing period.NUBC

Use these codes to decide payment liability, coordinate benefits, and administer subrogation.

Examples of commonly used occurrence codes include:

  • 02 – No-fault insurance involved – including auto accident/other
  • 11 – Onset of symptoms – illness
  • 16 – Date of last therapy
  • 17 – Date outpatient occupational therapy plan established or last reviewed
  • 23 – Date of cancellation of hospice election period
  • 29 – Date outpatient physical therapy plan established or last reviewed
  • 30 – Date outpatient speech pathology plan established or last reviewed
  • 41 – Date of first test for preadmission testing
  • 47 – Date cost outlier status begins
  • A3 – Benefits exhausted

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