Anesthesia billing varies from most other physician billing, in which there is usually a fee-for-service-based payment. However, alternatively being on a fee-for-service program, anesthesia providers are reimbursed according to a diverse practice consisting of time units and modifiers. The more complex nature of anesthesia billing means there is more potential for error, denial of claims, delayed payments, or worse audits. Anesthesia providers and their team have to deal with numerous challenges and complications with medical billing and coding, making the process more complicated and involved than what other providers have to endure. Here are some fundamental issues with billing for anesthesia providers and how they can mitigate them.