As an anesthesiologist or CRNA, you likely already know that billing for anesthesia is different than standard medical billing. Each claim runs through a combination of Base Unit + Time Unit + Qualifying Circumstance formula, and missing time logs, incorrect ASA Physical Status modifiers, or concurrency modifiers will eliminate an entire case’s reimbursement.
The federal government is aware of this problem; the 2025 HHS OIG audit indicated that spinal pain management procedures account for $45.7 million in at-risk Medicare reimbursement due to anesthesia modifiers, and the OIG has added anesthesia modifier compliance with AA modifier claims to its Work Plan for confirmation of personally performed service documentation.
Kodiak Solutions reports that the average denial rate for all healthcare services across the industry is 11.81%. By contrast, HFMA’s benchmark for a well-managed healthcare organization is only 5%. According to a statement made by the American Medical Association, 22% of all patient claims that are denied contain some sort of coding error and/or inaccuracies in the application of modifiers.
Top 10 Anesthesia Billing Companies in the US
This list of ten anesthesia billing companies was created using 5 specific criteria: the companies’ experience specifically related to billing for anesthesiology services; their clean claim-to-denial ratios; the companies’ accredited status with BBB; their Google Business Profile rating; and their anticipated technological capabilities in 2026, including the presence of artificial intelligence (AI)-based claim scrubbing programs, fully integrated electronic healthcare record (EHR) systems such as via Epic, Meditech, Cerner, and real-time eligibility verification capabilities.
| Company | Specialized Expertise | Clean Claim Ratio | BBB Rating | GBP Rating | Tech Edge |
| Nexus io | Concurrency / Time+Base | 98.5% | A- | 4.9 | AI-Enhanced Scrubbing |
| ABC | Pure Anesthesia Giant | 98.5% | A+ Accredited | 4.7 | F1RSTAnesthesia |
| HMB | Private Practice / CRNA | 98.7% | A+ Accredited | 4.9 | Predictive Analytics |
| MBW RCM | Modifier Specialist | 98.0% | A+ | 4.8 | Modifier-Logic Engine |
| Annex Med | Hospital / ASC Focused | 98.0% | A | 4.6 | Annex AI / RPA |
| Billing Paradise | AR Recovery Specialist | 98.0% | A+ | 4.9 | Billing Bridge App |
| Ventra Health | NSA / IDR Compliance | 97.2% | A+ Accredited | 4.5 | Ventra Optimize |
| MBM | 35+ Year Heritage | 97.0% | A+ | 4.7 | Digital Payment Posting |
| Anesthesia Experts | Staffing + Billing | 96.5% | A | 4.6 | Revenue Analytics |
| CloudRCM | OB / Ped Specialization | 97.0% | A | 4.5 | Cloud-Native AI |
Nexus io
Nexus io, based in Phoenix, AZ, was established in 2015 as an AI technology provider for anesthesia billing services in all 50 states across 50+ specialties. Their proprietary platform features real-time base + time unit scrubbing, concurrency conflict detection, CMS medical direction compliance verification, and ASA physical status modifier validation prior to submission for every client.
AAPC-certified coders manage the full anesthesia revenue cycle from insurance eligibility verification and prior authorization through charge capture, intraoperative documentation review, PACU billing, denial management, and AR recovery. Anesthesia practices report a 30% reduction in AR days and a 30% revenue increase within the first months. Nexus io holds a 98% first-pass clean claim rate, 97% collection ratio, 4.8/5 on Trustpilot.
Anesthesia Business Consultants (ABC)
Founded in 1979 and headquartered in Jackson, Michigan, ABC is one of the longest-standing pure-play anesthesia and pain management billing organizations in the country. It has recently become a part of Coronis Health. They process over 15 million procedures per year that fall within the anesthesia CPT code family (00100–01999), including over 300 full-time billing staff members. They have held BBB accreditation since October 2015 and maintain a 4.7/5 Google rating.
In addition to these best practices, they have developed a proprietary F1RSTAnesthesiaâ„¢ Oracle-based platform to process all aspects of an anesthesia specialist’s work. The F1RSTAnesthesiaâ„¢ Oracle-based F1RSTAnalytics dashboard and their OneSourceAnesthesia perioperative system manage every step of the patient’s journey, from pre-operative assessment documentation to PACU charge capture. AQI Preferred Vendor and MGMA Gold Affiliate recognition confirm their standing among hospital-based anesthesia groups. Clean claim rate: 98.5%.
Human Medical Billing
Human Medical Billing was established in 2001 and has its corporate headquarters in Ventura, California. The company is BBB Accredited A+ as of February 2024 and was established specifically to support independent anesthesia groups and private practices. They offer a month-to-month service model to avoid the lock-in that is common with most billing companies; therefore, their clients are able to cancel the service at will, without penalty.
The company reports a 98.7% first-pass ratio, sub-2% denial ratio, and 20% average monthly growth in collections for new clients. In addition, they have filed over 10 million claims to date and have integrated with over 25 electronic health record systems, including Epic and Cerner. AAPC and AMBA are both members of Human Medical Billing, and they have received a 4.9 out of 5-star rating on Google My Business.
MBW RCM
The anesthesia billing and coding division of MBW RCM was created specifically for understanding the unique complexities with modifiers and concurrent procedures that cause the most payment disputes through the billing and coding of anesthesia services (AA/QK/QX/QZ modifiers). With headquarters in Los Angeles, CA, they provide service throughout the U.S. Their payer-specific rules engine manages all combinations of AA/QK/QX/QZ modifiers, as well as all ASA physical status coding (P1 through P6), add-on codes for qualifying circumstances, and modifiers 51, 59, and XS—all of which are used in combination with each other and are the most commonly audited by payers for billing and coding of anesthesia services.
As part of their extensive billing system, all claims are submitted within 24-48 hours after the encounter and include integrated underpayment tracking and electronic remittance advice reconciliation. Customers of MBW RCM enjoy formal accolades, including an A+ rating from BBB, a clean claim rate between 98.0 – 98.2%, and an overall customer satisfaction rating through their 4.8/5 rating on Google Business Profiles.
AnnexMed
AnnexMed was founded in 2004 by John Britto and is headquartered in New York with SOC 2 Type 1 and Type 2 certified delivery centers in Chennai and Tirupathi, India. The company employs approximately 977 AAPC and AHIMA certified coding professionals to support their clients’ anesthetic practices and surgical centers. Their automated workflow processes adapt to the specific needs of each case type, including general anesthesia, regional nerve blocks, neuraxial anesthesia, and monitored anesthesia care (MAC).
Clients have real-time access to dashboards that display current trend data on case mix, average time spent in anesthesia, and any potential revenue loss attributable to anesthetic services provided. Client retention rate exceeds 99.1%, the rate of clean claims submitted each month is consistently over 95%, and the average rating of their clients on Google Business Profile is 4.6 out of 5 stars. Clients experience a 12-15% increase in collections within 90 days of engaging AnnexMed as their biller.
Billing Paradise
Billing Paradise was started in 2004 and is now located in Diamond Bar, CA. The company is BBB accredited with an A+ rating and maintains a 4.9 out of 5 rating on Google Business Profile. Their BillingBridgeâ„¢ platform allows clients to see their accounts receivable (AR) data in real-time, sorted by payer, aged receivables, and denial reasons.
The BillingBridgeâ„¢ platform is built specifically to help identify discrepancies between time units and base units; specifically, it has built-in checks to help identify any NCCI edits that are likely to result in silent revenue loss when billing for anesthesia services. They have an impressive clean claim rate of 98% while AR recovery specialists pursue historical receivables that prior billing companies abandoned. BillingParadise’s services are ideally suited for anesthesia practices that have a large quantity of aged receivables.
Ventra Health
Founded in 2007 and headquartered in Dallas, Texas, Ventra Health processes 6.14 million anesthesia claims annually, generating $2.4 billion in client collections across private practices, hospital systems, and ASCs. In February 2026, Ventra achieved HITRUST r2 Certification. This certification validates their data security controls. It checks against NIST, ISO, and OWASP frameworks. Their vCisionâ„¢ Revenue Intelligence Platform delivers strong results. It improves first-pass payment rates by 19% and reduces initial denial rates by 26%.
Ventra has nine AI modules that cover key areas, including payer contract analysis, benchmarking/fee schedule, and MIPS reporting compliance. The company is not currently accredited by the BBB; however, its Google Business Profile has an overall rating of 4.5 out of 5 with multiple KLAS Research citations.
Medical Business Management (MBM)
Medical Business Management (MBM) is a full-service provider specializing in anesthesia billing, coding, and practice management for anesthesiologists and CRNAs. Founded in 1990 and located in Vestavia Hills, Alabama. MBM supports over 500 healthcare practitioners with comprehensive services spanning physician credentialing, medical coding across CPT codes 00100–01999.
These services include charge entry, claims filing, payment posting, denial follow-up, and bill collections. Through 35+ years of exclusive anesthesia revenue cycle experience in the ASA Relative Value Guide application and conversion factor analysis. MBM maintains an A+ rating from the BBB, a 97%+ clean claim rate, and 4.7/5 stars on Google Business Profiles.
Anesthesia Experts
Based in Sedalia, Missouri, Anesthesia Experts has been working with anesthesia departments across the United States since its founding in 1983. They have developed a model that combines operational consulting with billing, auditing OR charge capture processes, intraoperative documentation, CRNA supervision records, and pre-anesthesia evaluation completion rates prior to submission of a claim.
This approach systematically targets the three leading anesthesia denial drivers: 1) Missing or inconsistent time documentations; 2) Invalid modifier combinations; 3) Concurrent conflicts among multi-provider cases performed in simultaneous operating rooms. Anesthesia Experts maintains an A BBB rating, a 4.6/5-star Google Business Profile and a 96.5% – 98% clean claim submission rate. This company is best positioned to assist hospital-based anesthesia departments that are undergoing restructuring.
CloudRCM Solutions
Founded in 2020, CloudRCM Solutions operates out of Park Ridge, Illinois, and provides cloud-based billing services to 50+ states in 50 different specialties. All billers are certified CMRS, RHIA, or CPB. The company uses AI technology to assist with billing activities such as flagging denials based on historical data or predicting possible concurrency conflicts. Their billing platform and operations are HIPAA compliant.
These tools target the most frequent anesthesia payer rejections. They focus on missing time units that address invalid ASA Physical Status modifiers. They correct improper medical direction modifier applications and fix place-of-service discrepancies.
These discrepancies often occur between hospital-based anesthesia claims and office-based anesthesia claims. CloudRCM reports a 97%+ clean claim rate and a 4.5/5 Google Business Profile. Their flexible service terms and competitive pricing make them an accessible entry point for solo CRNAs and smaller groups transitioning from in-house billing.
Conclusion
In conclusion, selecting a specialized anesthesia billing partner in 2026 is essential for any practice aiming to overcome persistently high denial rates, accelerate payment cycles, and allow providers to concentrate fully on patient care rather than getting bogged down in administrative complexities. The companies ranked above stand out as the market’s strongest options, offering powerful attributes such as AI-driven concurrency tools, deep pure-play expertise in anesthesia revenue cycles, flexible contract structures, proven mastery of No Surprises Act compliance, and consistently strong performance metrics. This includes clean claim rates of 95% or higher and meaningful reductions in accounts receivable days.
Rather than settling for a generalist provider, consider outsource medical billing services to Nexus io, a leader that combines these advantages with a track record of delivering real, measurable revenue gains and long-term financial stability in this highly regulated specialty. Take a moment to review your practice’s current scale, technology stack, and specific priorities, then reach out to schedule a consultation.
