Ambulatory surgery center (ASC) billing services manage the administrative work that turns a scheduled procedure into a correctly submitted claim and reconciled payment. The work spans the full revenue cycle—not only coding or sending claims. A reliable process connects scheduling, clinical documentation, payer rules, patient communication, claim follow-up, and financial reporting.
Exact requirements vary by payer, contract, service, and jurisdiction. Medicare ASC payment rules are not a universal fee schedule for commercial plans, and professional services billed by a surgeon or anesthesiologist may follow a separate claim and payment path from the ASC facility claim.
The ASC billing workflow, step by step
- Capture complete registration details. Confirm patient identity, demographics, coverage, subscriber information, and coordination of benefits. Resolve mismatches before the date of service where possible.
- Verify eligibility and benefits. Check coverage for the planned service and facility, network status, deductible, copayment or coinsurance, and any plan-specific conditions. Eligibility is not a guarantee of payment; document the payer response and date.
- Obtain authorization when required. Confirm whether prior authorization, referral, or medical-necessity documentation is needed. Match the authorization to the planned procedure, provider, location, and date range. Track pending approvals and changes to the surgical plan.
- Document and capture charges. After the procedure, reconcile the operative record, supplies, implants, drugs, devices, and other reportable services with the schedule and charge master. Escalate missing or inconsistent documentation to the appropriate clinical owner rather than guessing.
- Code and review the claim. Assign diagnosis and procedure codes, modifiers, units, and other claim details according to current code sets, payer policy, and documented facts. Check edits, bundling rules, coverage, and payer-specific requirements. Do not use a code simply because it produces a higher payment.
- Submit and monitor claims. Send the facility claim through the required channel, confirm acceptance, and track it through adjudication. A clearinghouse acceptance is not the same as payer payment or final approval.
- Post remittances and work exceptions. Reconcile electronic remittance advice or explanation of benefits against expected allowed amounts, contractual adjustments, patient responsibility, and payments. Categorize denials, correct errors, submit appeals where appropriate, and monitor filing deadlines.
- Communicate balances and close the cycle. Provide understandable statements, answer questions, apply payments accurately, and reconcile accounts. Follow applicable patient billing, notice, and collection requirements.
How Medicare ASC payment fits in
For Medicare fee-for-service, CMS publishes an ASC payment system with covered procedure and ancillary-service files, payment indicators, and rates that can change by calendar year and quarter. Facility payment generally depends on whether the service is covered under the ASC system and on the applicable code, payment group, and program rules. Consult the current CMS files and Medicare Claims Processing Manual rather than relying on an old conversion factor or a general online estimate. Other payers may use negotiated contracts and different coverage or billing policies.
What billing services may include
An ASC may handle billing in-house, use an external billing company, or combine the two. Services can include registration and benefits checks, authorization tracking, coding support, charge review, claim submission, payment posting, denial and appeal work, patient statements, credentialing coordination, and management reports. Define the scope precisely: “billing included” does not tell you which tasks, payer calls, appeals, or patient inquiries are covered.
