Specialty billing
ENT & Otolaryngology Medical Billing Services
ENT billing combines office endoscopy, audiology, allergy testing and immunotherapy, and surgical procedures — four distinct billing models in one practice. Audiology and allergy services carry particularly restrictive coverage rules that differ sharply between Medicare and commercial plans.
ENT & Otolaryngology benchmarks
- Typical denial rate
- 11–17%
- Days in AR
- 34–46
- Achievable clean claim rate
- 96%+
Typical ranges for ENT practices. Your actual numbers are measured during the audit.
The complexity
Why ent & otolaryngology is uniquely difficult to bill
Nasal endoscopy bundles with sinus procedures performed in the same session
Audiology coverage depends on whether testing is diagnostic or for hearing aid fitting
Allergy immunotherapy separates antigen preparation from injection administration
Allergy testing is billed per test unit with payer caps on quantity
Balloon sinuplasty requires prior authorization and documented failed medical therapy
Tonsillectomy and similar procedures carry global periods
Coding
ENT & Otolaryngology procedure codes we work with daily
A representative sample, not an exhaustive list. Coders are assigned by specialty rather than pooled.
| Code | Description |
|---|---|
| 31231 | Nasal endoscopy, diagnostic, unilateral or bilateral |
| 69210 | Removal of impacted cerumen requiring instrumentation, unilateral |
| 92557 | Comprehensive audiometry threshold evaluation and speech recognition |
| 95165 | Professional services for antigen preparation, per dose |
| 42820 | Tonsillectomy and adenoidectomy, younger than age 12 |
| 31237 | Nasal or sinus endoscopy with biopsy, polypectomy or debridement |
Revenue leakage
Where ent & otolaryngology practices lose money
These are the denial patterns specific to this specialty — the ones a general-purpose billing service will not be looking for.
Endoscopy bundling
Diagnostic nasal endoscopy billed alongside a therapeutic sinus procedure performed in the same session.
Audiology purpose exclusion
Hearing testing denied by Medicare where it was performed for hearing aid fitting rather than medical diagnosis.
Antigen dose units
Immunotherapy antigen preparation billed by vial rather than by the number of doses prepared.
Allergy test quantity caps
Testing denied where the number of tests exceeds the payer's covered maximum per session.
Cerumen removal requirements
Cerumen removal billed where documentation does not establish impaction requiring instrumentation.
Payer landscape
What ENT practices need to know about payers
Payer policy drives more ent & otolaryngology denials than coding does. Knowing the policy before the service is what prevents them.
- Medicare covers diagnostic audiology when ordered to evaluate a medical condition, but not testing performed for hearing aid fitting.
- Antigen preparation is billed per dose prepared, which is a frequent source of both under- and over-billing.
- Balloon sinuplasty typically requires prior authorization plus documented failure of medical management.
Questions
ENT & Otolaryngology billing FAQ
Last updated August 20, 2026
Reviewed by a certified coding leadWhen it is performed as a distinct diagnostic service, not as the access route for a therapeutic procedure in the same session. If a polypectomy or debridement is performed endoscopically, the diagnostic endoscopy is bundled into it. A separately scheduled diagnostic endoscopy at a different encounter is billable.
It covers diagnostic audiology ordered to evaluate a medical condition such as sudden hearing loss, vertigo or tinnitus. It does not cover testing performed to select or fit a hearing aid, even when the same test is performed. The ordering purpose documented in the record determines coverage.
Antigen preparation and injection administration are separate services. Preparation is billed per dose prepared from the vial, not per vial — so a multi-dose vial supports multiple units. Miscounting here is one of the most common ENT billing errors in either direction.
The record must establish that the cerumen was impacted and that removal required instrumentation, a microscope or irrigation performed by the physician. Simple lavage by staff does not support the code. Documenting the impaction and the method used is what makes the claim defensible.
Primary sources
Coverage, rates and local policy for ent & otolaryngology, at the source.
- NCCI Policy Manual for Medicare Services (opens in a new tab)
Centers for Medicare & Medicaid Services — The reasoning behind the edits, chapter by chapter. Where the edit files tell you two codes conflict, this explains why — which is what an appeal has to address.
- Medicare Coverage Database (LCD/NCD) (opens in a new tab)
Centers for Medicare & Medicaid Services — Searchable national and local coverage determinations. The direct answer to whether a diagnosis supports medical necessity for a given procedure.
- Medicare Physician Fee Schedule lookup (opens in a new tab)
Centers for Medicare & Medicaid Services — Official allowed amounts by CPT/HCPCS code and locality. The reference point most commercial contracts are written against as a percentage.
Get a free ent & otolaryngology billing audit
We'll review your ent & otolaryngology denial patterns, coding accuracy and AR aging against the benchmarks above. Takes about two minutes to request.
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