Wiki ER Coding

I was always instructed that ED billing for the provider is the date the patient was initially seen. So for your example, 09/21/21.
 
If the patient was not admitted and only in the ER, you don't bill a discharge. Just your emergency dept E/M 99281-99285, and any other separately billable services you may have provided.
If the patient was admitted to observation status, there would be different codes to use. I would highly doubt pt was admitted to observation if the entire stay was 3 hours.
 
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