Introduction
Type of Bill Code 0831 identifies a claim submitted by a specialty facility for outpatient surgical services. This code is reported in Field 4: Type of Bill.
Usage
This code is specifically used by freestanding Ambulatory Surgery Centers (ASCs) to bill for surgical procedures performed on an outpatient basis. The '831' sequence indicates a specialty facility (8), an ASC sub-type (3), and an admit-through-discharge claim frequency (1).
Billing Impact
Correct use of this code ensures the claim is processed under the ASC fee schedule rather than the standard hospital outpatient prospective payment system (OPPS).
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This guide was developed by the FormJuicer Billing Research Team using official CMS and NUBC guidelines, combined with patterns observed from processing thousands of real UB-04 documents through our system.
Last Updated: April 30, 2026
Sources: CMS Pub. 100-04 Chapter 25, NUBC Official UB-04 Manual, Medicare Contractor Bulletins (Noridian, Palmetto, CGS)