ENT billing services for scopes, sinus surgery and audiology

The codes an ENT practice bills most

Modifiers that matter

Payer rules to know

Top denials in ent billing services for scopes, sinus surgery and audiology

What does ENT billing cover?

ENT billing, also called otolaryngology billing, covers the nose and sinuses, the ear, the throat and larynx, and the hearing and balance testing beside them. Claims go wrong in four places: endoscopy codes that bundle, bilateral lines, earwax removal and audiology tests.

Medicare pays physician services from the Medicare Physician Fee Schedule. Every status, global period and bilateral indicator below comes from the October 2026 relative value file (RVU26D, released 08/26/2026). Bundling rules come from the CMS NCCI Policy Manual (revision date 1/1/2026), Chapters V, VIII and XI, and the Q4 2026 practitioner PTP edit file.

Allergy testing is on allergy and immunology billing, children's ear care and Medicaid on pediatric billing, and global periods and modifiers 24, 57, 58 and 78 on general surgery billing.

How do we bill a diagnostic nasal endoscopy with an office visit?

Bill 31231 for the scope and add the visit only when it stands apart. RVU26D gives 31231 a 000-day global period. NCCI treats any 000 or 010 global procedure as minor, and says the decision to perform it is included in its payment.

An E/M visit on the same day is reportable with modifier 25 only when it is significant, separately identifiable and unrelated to the decision to scope. It does not need a different diagnosis, and new patient status alone is not enough. The Q4 2026 PTP file pairs 31231 over 99213 at modifier indicator 1, so modifier 25 can clear the edit when the note supports it.

31231 is the base endoscopy for 31237, 31238, 31240, 31253 to 31256, 31267, 31276 and the dilation codes 31295 to 31298, which carry multiple procedure indicator 3. Claims Processing Manual Chapter 12, section 40.6, says Medicare pays the highest-valued endoscopy in a family plus the difference between the next one and the base.

• NCCI Chapter V, C.3: a surgical endoscopy includes checking its access regions, so no diagnostic nasal endoscopy is billed just because the approach is transnasal.
• The PTP file pairs 31237, 31238, 31254, 31255, 31256 and 31267 over 31231 at indicator 0. No modifier overrides them.
• NCCI C.5: control of bleeding is part of the endoscopic procedure, so 30901 is not added.
• NCCI C.14: nasopharyngoscopy 92511 is not billed as a cursory look during another respiratory endoscopy.

How do the surgical sinus endoscopy codes bundle with each other?

Report the most comprehensive code that describes the work. NCCI Chapter V, C.6, adds modifier 51 on a secondary code only when one code cannot describe everything, and bars incidental looks at other areas.

The PTP file pairs 31267 over 31295 and 31295 over 31256 at indicator 1, which allows a modifier only when the work was truly separate. Use RT, LT or XS and name the side or sinus in the note.

How do we bill balloon sinus dilation?

In plain terms, 31295 dilates the maxillary sinus opening, 31296 the frontal, 31297 the sphenoid and 31298 the frontal and sphenoid together. RVU26D lists all four as status A with a 000 global and 31231 as the base. The October 2026 Medicare MUE file allows 1 unit each of 31295, 31296 and 31297 per date of service.

RVU26D gives them bilateral indicator 1. For Medicare, both sides go on one line with modifier 50 and one unit, paid at the lower of the charge or 150% of the single fee (Claims Processing Manual Chapter 12, section 40.7).

Commercial plans often add necessity criteria. UnitedHealthcare commercial policy 2026T0571U, effective July 1, 2026, covers balloon dilation or functional endoscopic sinus surgery (FESS) for chronic rhinosinusitis when all of these are present:

• Symptoms past 12 weeks despite recent full courses of intranasal corticosteroids, antibiotics if bacterial infection is suspected, and irrigation if appropriate.
• A CT taken after that treatment, for each sinus treated, showing bony change, an opacified sinus, or ostial obstruction with mucosal thickening, with extent of disease recorded.
• Pain, pressure or drainage on the same side as the CT findings.
• For balloon dilation, only the frontal, maxillary or sphenoid sinuses.

The policy defines a recent CT as one within 12 months of the procedure, calls balloon dilation unproven for polyps or tumors, and calls self-expanding absorptive sinus dilation unproven for all conditions.

Modifier 50, RT and LT, or the payer's bilateral indicator: which applies?

For Medicare, the bilateral indicator in RVU26D decides payment. Modifier 50 goes on a single line for a procedure CPT does not describe as bilateral (Claims Processing Manual Chapter 12, section 40.7.B). Medicare notes this differs from CPT guidance, which asks for two lines. Codes described as bilateral do not take modifier 50.

So a nasal endoscopy of both nostrils is one 31231 at the full fee, modifier 50 on a laryngoscopy is wrong, and tubes in both ears are one line with modifier 50. Audiology differs: NCCI Chapter XI says tests 92550 to 92588 include both ears, so one unit covers both, and a one-ear test takes modifier 52. Commercial plans set their own bilateral method, so check each provider manual.

How do we bill laryngoscopy?

RVU26D makes 31575 the base for 31576, 31578 and 31579, all 000 global with bilateral indicator 0. The family payment rule from section 40.6 applies.

• NCCI Chapter V, C.8: flexible and direct laryngoscopy are not billed for the same encounter.
• C.10 and C.13: laryngoscopy to place an endotracheal tube or a tracheostomy is not billed.
• C.3: two regions needing two different scopes, such as a bronchoscope and a laryngoscope, can both be billed when each is medically necessary.
• The PTP file pairs 31579 over 31575 at indicator 0, and 31575 over 99213 and 92511 at indicator 1.

When is cerumen removal separately payable, and when do we use G0268?

NCCI describes 69209 as removal of impacted cerumen by irrigation of one ear and 69210 as removal needing instruments in one ear. G0268 is removal of impacted cerumen by a physician on the same date as audiologic function testing. All three are status A with a 000 global.

PC/TC indicator 5 marks a service covered incident to a physician when auxiliary staff do it under direct supervision, and RVU26D says A/B MACs cannot pay it for hospital inpatients or outpatients. The MUE for each code is 1 unit per date of service. For two ears, 69209 with modifier 50 pays 150% of one ear, while 69210 and G0268 pay 100% of one fee. Confirm with your MAC before sending two units.

• NCCI Chapter XI, H.6: if an audiologist cleans the ear before testing, it is not billed. If the wax is impacted and a physician must remove it, report G0268, not 69209 or 69210.
• A comprehensive hearing test and instrument removal by the same provider do not both pay (92557 over 69210, indicator 0).

Document that the wax was impacted, which ear, and the method.

Who may bill audiology tests under Medicare, and for which reasons?

Medicare covers hearing and balance tests as diagnostic tests. Benefit Policy Manual Chapter 15, section 80.3, says they are not covered as services incident to a physician, because they have their own benefit. Audiologist-performed tests are excepted from physician supervision under 42 CFR 410.32(b)(2)(ii).

An order from a physician or NPP is required. Without one, the tests are not covered even if the audiologist finds a pathologic condition. Section 1862(a)(7) bars payment when the physician already knows the type and severity of the problem, or the test was ordered to fit a hearing aid. A referral for symptoms of hearing loss, balance disorder, tinnitus or ear disease is covered even if the result is a hearing aid prescription. Audiologists cannot bill Medicare for treatment, such as vestibular rehabilitation or canalith repositioning.

NCCI Chapter XI, H.1, adds that tests 92552 to 92557 and 92562 to 92588 are reported only when calibrated electronic equipment is used.

How do we bill ear tubes and tympanostomy?

RVU26D lists 69433, 69436, 69420 and 69421 as status A with a 010 global, bilateral indicator 1 and multiple procedure indicator 2. A visit that decides on tubes is included, and a separate visit needs modifier 25 and an unrelated problem.

• NCCI Chapter VIII, E.2: a myringotomy is included in a tympanostomy and is not billed separately. E.3 says the same for drum procedures when a transcanal approach is used.
• The PTP file pairs 69433 over 69420, 69436 and 69210 at indicator 1, but NCCI Chapter I still bars cerumen removal with a myringotomy.
• For Medicare, tubes in both ears are one line with modifier 50 and one unit.

A visit in the 10 days after surgery for an unrelated problem uses modifier 24, covered on general surgery billing. Many children with tubes are on Medicaid, so see pediatric billing.

How does allergy testing overlap with an ENT visit?

Skin test counts, frequency limits and extract rules are on allergy and immunology billing. The ENT point: 95004 has an XXX global, so a significant E/M takes modifier 25, and the Q4 2026 PTP file pairs 95004 under 99213 at indicator 1. The file has no edit between 95004 and 31231 in either order, but the note must show each service was necessary.

How do Medicare and commercial rules differ for ENT claims?

Medicare works from the indicators, NCCI and MUEs above. Commercial plans publish their own medical policies, and UnitedHealthcare policy 2026T0571U is a clear example. A plan may follow NCCI or use its own edits, so we read each provider manual and keep the rule beside the claim. Denials carry a CARC (claim adjustment reason code); the common ones are in the denial table, and our denial management team works them within 48 hours.

How we handle ENT billing

We code each claim from the procedure note, send claims within 24 hours of charge entry and work denials within 48 hours. Our certified coders, with AAPC and AHIMA credentials, check endoscopy families, bilateral lines, cerumen codes and audiology orders before the claim goes out. Our team has billed for US practices since 2018 and works to a 95% clean claim rate.

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