Are ASC facility fees and physician fees billed on the same claim form?

Yes. Both the ASC facility claim and the physician professional claim go out on a CMS-1500 form with place of service code 24. That shared format is the main reason billing teams mix up modifiers, charges, and payer rules between the two claims.

What is the difference between an ASC facility fee and a physician fee?

The facility fee covers the ASC’s overhead: staff, equipment, supplies, and the space itself. The physician fee covers the surgeon’s or proceduralist’s professional work. They are paid under two separate fee schedules even though the same CPT code often appears on both claims.

What does modifier 73 mean on an ASC claim?

Modifier 73 marks a procedure that was discontinued before anesthesia was administered. On the facility claim, Medicare pays 50 percent of the standard ASC rate. It does not apply to the physician claim in the same way, since the surgeon hasn’t yet performed the billable service.

What does modifier 74 mean on an ASC claim?

Modifier 74 marks a procedure discontinued after anesthesia was administered. The facility claim is paid at 100 percent of the standard ASC rate because the ASC already used its resources. Mixing up 73 and 74 is one of the most common ASC billing errors.

Why does the SG modifier still show up on ASC claims?

Medicare stopped requiring modifier SG in 2008, but many commercial and Medicaid payers still use it to flag the facility claim and separate it from the physician claim. Skipping it on payers that still require it is a common cause of facility fee denials.

Can an ASC bill for surgical implants separately?

Yes, in most cases. High-cost implants and devices usually need their own HCPCS or C-code line on the facility claim, separate from the procedure code. Billing the device cost again on the physician claim creates a duplicate charge that payers will catch and deny.

How does the multiple procedure reduction work for ASC claims?

On the facility side, Medicare pays 100 percent of the ASC rate for the highest-paid procedure and 50 percent for each additional procedure in the same session. The physician fee schedule uses a different scale: 100 percent for the first procedure, 50 percent for the second, and 25 percent for the third and beyond.

Should anesthesia charges appear on the ASC facility claim?

Anesthesia is billed separately by the anesthesiologist or CRNA using time-based units, not bundled into the ASC facility rate. Facility claims that fold anesthesia drug costs into the main procedure line often trigger payer edits and delayed payment.

What is a global surgery period and how does it affect ASC billing?

The global period is the window after surgery, 0, 10, or 90 days depending on the CPT code, during which routine follow-up visits are bundled into the physician’s fee. Billing the facility for a post-op visit that falls inside that window is a common denial trigger.

Why do ASC claims get denied for the wrong place of service code?

ASC claims should use place of service code 24. Some billers default to 11 for office or 22 for hospital outpatient out of habit, which changes how the payer prices the claim and can trigger an automatic denial on both the facility and physician side.

How can an ASC reduce facility and physician fee miscoding?

Run a pre-submission checklist that confirms modifier accuracy, place of service codes, device line items, and multiple procedure reductions on both claims together. Outsourced RCM partners that specialize in ASC billing typically catch these mismatches before the claim reaches the payer.

ASC Billing: Where Facility Fees and Physician Fees Get Miscoded Together

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