Audiology Billing: Diagnostic Coding, Hearing Aid Rules, and Medicare Compliance
Audiology billing requires careful navigation of the line between diagnostic and screening services, strict Medicare coverage limitations, and payer-specific documentation requirements. Coding errors in this specialty frequently result in denials that could be prevented with proper workflow design.
Core Diagnostic CPT Codes
Comprehensive audiometry (92557) is the most commonly billed audiology code, combining pure tone air and bone conduction testing with speech recognition testing. Tympanometry (92567) evaluates middle ear function and is often billed alongside audiometry. Distortion product otoacoustic emissions testing (92588) assesses outer hair cell function and is particularly important for pediatric evaluations and ototoxicity monitoring. Speech therapy services use 92507 for individual treatment sessions addressing auditory processing and communication disorders.
Diagnostic vs. Screening: The Critical Distinction
Medicare and most commercial payers cover audiological testing only when ordered by a physician for diagnostic purposes. The referring provider must document a medical reason for the evaluation, such as hearing loss, tinnitus, vertigo, or otalgia. Screening audiograms performed without a physician order or without a documented medical complaint are not covered under Medicare Part B. When a screening identifies a problem that leads to diagnostic testing in the same session, the diagnostic portion may be billable, but documentation must clearly delineate the transition from screening to diagnostic evaluation.
Medicare Hearing Aid Exclusion and ABN Requirements
Medicare explicitly excludes coverage for hearing aids and related fitting services. Hearing aid codes (V5008 through V5020) are never payable by Medicare. When providing hearing aid services to Medicare beneficiaries, practices must issue an Advance Beneficiary Notice (ABN) before the appointment. The ABN informs the patient that Medicare will not pay and that they accept financial responsibility. Without a signed ABN on file, the practice cannot bill the patient for hearing aid evaluations or devices, resulting in a complete revenue loss for those services.
Physician Order and Supervision Requirements
Medicare requires that all diagnostic audiology services be ordered by a physician or qualified non-physician practitioner. The order must be received before the date of service, and the audiologist must maintain the order in the patient record. Some Medicare Administrative Contractors require that the order specify the tests requested, not just a general referral for “hearing evaluation.” Commercial payers vary in their referral requirements, but maintaining a signed physician order for every diagnostic encounter is a best practice that protects against denials across all payer types. Practices should audit their order-to-service documentation chain quarterly to catch compliance gaps before they become audit findings.