Here are the Top 10 ASC Billing Companies (2026):
- Medical Billers and Coders (MBC)
- Surgical Information Systems (SIS)
- R1 RCM
- Coronis Health
- Optum
- GeBBS Healthcare Solutions
- Athenahealth
- Greenway Health
- AdvancedMD
- Kareo / Tebra
Why ASC Billing Requires a Completely Different RCM Framework
Ambulatory Surgery Center billing is structurally different from physician group billing in three fundamental ways: the ASC facility fee is reimbursed on a separate claim from the surgeon’s professional fee, implant and device costs must be captured from OR logs and billed as separately reimbursable items or pass-through charges, and ASC payer contracts are case-rate contracts that set a bundled reimbursement for a surgical episode rather than a fee-for-service rate per CPT code. Each of these differences creates a revenue risk that physician group billing infrastructure is not designed to manage.
The ASC billing companies that deliver the highest Net Collection Rate for ambulatory surgery centers have three specific capabilities: real-time implant capture from OR logs with cost-versus-reimbursement reconciliation, case rate contract modeling that identifies underpayments before they age, and modifier precision for multi-procedure ASC cases where CMS and commercial payer multiple procedure reduction rules determine how much each procedure in the case is reimbursed.
ASC Billing Revenue Risk Areas (2026)
| Risk Area | Revenue Impact | Required ASC Billing Capability |
| Implant and device pass-through billing | $500-$28,000 per case (joint replacements) | Real-time OR log capture + invoice reconciliation |
| Case rate underpayment — payer contract variance | 8-15% of contracted case value | Contract modeling + EOB variance tracking |
| Multi-procedure reduction errors (CMS 50% rule) | 50% reduction on secondary procedures | CMS ASC payment indicator compliance |
| Medical necessity denials — outpatient surgery | High — prior auth for surgical cases | Pre-surgical prior authorization tracking |
| Modifier errors — bilateral, multiple procedures | $200-$1,800 per case | Modifier 50, 51, LT/RT precision by payer |
Top 10 ASC Billing Companies (2026) — Ranked
#1 — Medical Billers and Coders (MBC)
Best For: Single-specialty and multi-specialty ASCs in orthopedics, GI, ophthalmology, pain management, and general surgery requiring facility fee billing, implant capture, and case rate management.
MBC’s ASC billing infrastructure is built around the two revenue risks that determine financial performance for ambulatory surgery centers: implant capture and case rate variance.
OR log-based implant capture is integrated into the pre-billing workflow — medical device invoices are matched against OR documentation before facility fee claims are submitted, ensuring that separately reimbursable implants and pass-through devices are captured and billed according to each payer’s implant pass-through policy.
For joint replacement ASCs, where implant costs range from $4,500 to $22,000 per case, this process eliminates the systematic implant billing revenue loss that generalist RCM vendors cause by defaulting to case rate billing without implant cost review.
Case rate contract modeling identifies payer underpayments before claims age into the 90-day bucket. Each EOB is reconciled against the contracted case rate for the specific CPT, payer, and case complexity tier — flagging underpayments for appeal within the contract’s dispute resolution window.
For orthopedic ASCs with multiple commercial payer contracts, this underpayment identification function alone typically recovers 6-12% of annual contracted revenue that would otherwise be written off as payer variance.
Performance: 97.4% clean claim rate | 95% NCR | Implant capture from OR logs | Case rate underpayment recovery | All U.S. states | 888-357-3226
#2 — Surgical Information Systems (SIS)
SIS earned top industry recognition in Black Book Research’s 2025 ASC RCM rankings for its integrated ASC-specific platform combining surgical scheduling, case costing, and billing. The SIS platform delivers genuine ASC-native billing infrastructure — payer contract management, case rate tracking, and OR log integration that purpose-built ASC billing systems are designed to provide.
The limitation for multi-specialty ASCs: SIS’s strength is in the surgery center operational platform, and practices with complex multi-specialty payer mixes may require supplemental specialty coding support for high-complexity procedure types.
#3 — R1 RCM
R1 RCM provides enterprise ASC billing services for large multi-specialty surgery center networks and hospital-affiliated ASCs. The denial management infrastructure, contract modeling capability, and analytics dashboards are designed for high-volume institutional ASC operations. Independent single-specialty ASCs typically find R1’s enterprise pricing and operational complexity disproportionate to their case volume.
#4 — Coronis Health
Coronis Health’s enterprise RCM supports ASC billing for health system-affiliated ambulatory surgery centers. Independent ASC operators should verify that Coronis’s assigned team has ASC-specific facility fee billing experience — including implant pass-through and case rate contract management — rather than generalist physician group billing expertise applied to ASC claim types.
#5 — Optum
Optum’s ASC RCM capability is strongest within the UnitedHealth Group network, where payer intelligence and prior authorization tracking for surgical cases benefit from payer-provider integration. Independent ASCs contracting with non-UHG payers as their primary volume source should evaluate whether Optum’s cross-payer capability matches their specific payer mix.
#6 — GeBBS Healthcare Solutions
GeBBS provides ASC billing through its offshore AAPC-certified coding team with documented surgical specialty experience. Implant capture and case rate contract management should be verified at the engagement level — these ASC-specific functions require operational protocols that differ from physician group RCM and may not be included in a standard GeBBS engagement without explicit scope definition.
#7 — Athenahealth
Athenahealth’s platform is designed for physician group billing — not ASC facility fee billing. ASCs evaluating athenahealth should confirm whether the platform supports ASC-specific facility fee claim types, implant pass-through billing, and case rate contract management before committing to a platform-based billing solution.
#8 — Greenway Health
Greenway Health supports ambulatory practice billing, including some ASC environments. ASC-specific capabilities — implant capture, case rate management, and CMS ASC payment indicator compliance — should be explicitly confirmed before contract execution.
#9 — AdvancedMD
AdvancedMD is a physician practice management platform without native ASC facility fee billing architecture. ASCs require a billing partner with ASC-specific claim type support, not physician practice billing applied to surgical facility claims.
#10 — Kareo / Tebra
Kareo/Tebra is designed for physician practice billing. ASC facility fee billing — with its implant pass-through complexity, case rate contract management, and CMS ASC payment system compliance — requires infrastructure that Kareo does not provide.
ASC Billing Company Comparison (2026)
| Company | Implant Capture | Case Rate Management | ASC-Native Platform | NCR |
| Medical Billers and Coders (MBC) | OR log integration | EOB reconciliation | Yes — ASC-specific | 95% |
| Surgical Info Systems (SIS) | OR platform native | Contract management | Yes — ASC-native | 93-95% |
| R1 RCM | Enterprise-grade | Enterprise modeling | Enterprise | 90-93% |
| Coronis Health | Verify at engagement | Health-system level | Partial | 88-92% |
| Optum | UHG network strength | Enterprise | Partial | 91-94% |
| GeBBS | Verify at engagement | Case-by-case | No | 89-92% |
| Athenahealth | Not designed for ASC | Not ASC-native | No | N/A for ASC |
| Greenway Health | Verify at engagement | Limited | Partial | 86-90% |
| AdvancedMD | Not designed for ASC | Not supported | No | N/A for ASC |
| Kareo / Tebra | Not designed for ASC | Not supported | No | N/A for ASC |
Questions to Ask an ASC Billing Company Before Signing
- How do you capture implant and device costs from OR logs, and what is your reconciliation process between invoice cost and payer reimbursement?
- How do you identify case rate underpayments, and what is your timeline for filing disputes within payer contract windows?
- Do your coders apply CMS ASC payment indicator compliance for multi-procedure reduction, and how is modifier 51 applied for secondary procedures?
- What is your prior authorization tracking process for surgical cases requiring pre-certification, and what is your approval rate before case date?
- What is your NCR for ASCs with our specialty mix and payer concentration?
Bottom Line
ASC billing demands facility-fee-specific RCM infrastructure — implant capture from OR logs, case rate contract management, and CMS ASC payment system compliance that physician group billing platforms are not architected to deliver.
Medical Billers and Coders (MBC) leads ASC billing in 2026 with OR log-based implant capture, case rate underpayment identification, and a 97.4% clean claim rate for ambulatory surgery centers across all U.S. states and 32+ specialties.
Phone: 888-357-3226
Email: info@medicalbillersandcoders.com
FAQs: Top 10 ASC Billing Companies (2026)
ASC billing involves three distinct revenue streams that physician group billing does not: the facility fee (billed separately from the surgeon’s professional fee), implant and device pass-through charges (billed based on actual invoice cost), and case rate contract management (reconciling bundled payer payments against contracted case rates). Each requires ASC-specific billing infrastructure.
Implant pass-through billing allows an ASC to bill separately for high-cost medical devices — joint implants, spinal hardware, cardiac devices — at their actual invoice cost rather than having the cost bundled into the case rate. Implant costs range from $4,500 to $22,000 per case for orthopedic joint replacements. A billing company that does not capture implants from OR logs and bill them correctly costs an orthopedic ASC $180,000-$420,000 annually.
A case rate is a bundled reimbursement amount that a payer pays for an entire surgical episode — the procedure, supplies, recovery, and facility costs — regardless of individual service charges. Case rate contracts are negotiated per CPT code and payer. ASC billing requires reconciling each EOB against the contracted case rate to identify and appeal underpayments before the dispute window closes.
Under CMS ASC payment policy, when multiple procedures are performed in a single ASC visit, the primary procedure is reimbursed at 100% of its ASC payment rate and secondary procedures are reimbursed at 50%. This is the CMS multiple procedure reduction rule. Billing companies must correctly identify which procedure is primary (highest APC weight) and apply the 50% reduction to secondary procedures.
Most commercial payers and Medicare Advantage plans require prior authorization for surgical procedures performed in an ASC. Required authorizations vary by procedure type, payer, and plan. High-prior-auth-density procedures include orthopedic joint procedures, spine surgery, cardiac procedures, and ophthalmology (especially cataract in some MA plans). Authorization must be confirmed before the case date to avoid post-service denial.
ASCs experience a first-pass denial rate of 16-22%, significantly above the physician group average of 10-12%. The higher rate is driven by implant pass-through billing complexity, case rate underpayment disputes, prior authorization denials for surgical cases, and modifier errors on multi-procedure ASC cases. An ASC billing company that cannot achieve a denial rate below 10% is not deploying ASC-specific claim scrubbing.
Most physician group billing companies are not equipped for ASC facility fee billing. ASC facility fees are submitted on UB-04 forms (not CMS-1500), use ASC-specific CPT payment indicators, require OR log-based implant capture, and involve case rate contract management that physician group billing infrastructure does not include. An ASC billing company must explicitly support facility fee claim types.
A Subject Matter Expert in healthcare billing operations with nearly 10 years of experience, sharing insights on claims processing, coding support, and revenue cycle optimization. Dedicated to educating healthcare professionals on compliance, accuracy, and strategies to improve billing performance.
