A medical billing company in the USA is a specialized service provider that manages the billing, coding, and revenue cycle processes for healthcare practices, hospitals, and clinics. These companies handle critical tasks such as verifying patient insurance coverage, submitting claims to insurance providers, following up on unpaid claims, posting payments, and managing denials or rejections. By staying updated with HIPAA regulations, ICD-10, CPT, and HCPCS coding standards, medical billing companies ensure compliance and accuracy, which helps healthcare providers avoid costly errors and maximize reimbursements.