CPT Code 42826: Tonsillectomy Billing Guide for ENT Practices

What Is CPT Code 42826?

CPT code 42826 is the billing code for a tonsillectomy, primary or secondary, in a patient age 12 or over. This cpt code 42826 tonsillectomy billing guide covers the age split with 42825, the combination codes used when adenoids are removed in the same session, and the diagnoses payers expect to see before they pay.

Age decides the code: Use 42826 for patients 12 or older on the date of surgery and 42825 for younger patients.

Adenoids change the code: When adenoids come out in the same session, report 42821 (age 12 or over) instead of 42826 plus an adenoidectomy code.

Denials are preventable: Specialized ENT billing services confirm prior authorization, diagnosis support, and global period rules before tonsillectomy claims go out.

New to ENT coding? Start here: our guide to understanding ENT CPT and ICD-10 codes.

CPT Code 42826 Tonsillectomy Billing Guide: Related Codes

The American Medical Association’s CPT code set divides tonsil and adenoid surgery by procedure, by whether the adenoids are included, and by the patient’s age. The age threshold of 12 appears across the entire family, so the date of birth on the claim has to match the code. Tonsillectomy codes describe removal of both tonsils, so modifier 50 is not used, and the descriptors do not name a surgical technique.

Code	Description	When to Use It
42826	Tonsillectomy, primary or secondary; age 12 or over	Tonsils only, adolescent or adult
42825	Tonsillectomy, primary or secondary; younger than age 12	Tonsils only, child under 12
42821	Tonsillectomy and adenoidectomy; age 12 or over	Both removed, age 12 or over
42820	Tonsillectomy and adenoidectomy; younger than age 12	Both removed, child under 12
42831 / 42836	Adenoidectomy, primary or secondary; age 12 or over	Adenoids only, age 12 or over
42960 to 42962	Control of oropharyngeal hemorrhage, primary or secondary	Post-tonsillectomy bleeding

Because the descriptor says primary or secondary, 42826 also covers a revision tonsillectomy, such as removing regrown tonsil tissue after an earlier procedure. Technique questions come up constantly. Coblation, electrocautery, cold steel, and intracapsular approaches generally report the same tonsillectomy code because CPT does not specify method, though some payers publish their own policies on partial or intracapsular removal, so check before billing a reduced-service modifier.

In our experience matching ENT practices with billing partners, the most common coding error in this family is billing 42826 plus an adenoidectomy code when a combination code exists. Combination codes pay one surgical fee, and unbundling them invites a National Correct Coding Initiative denial or recoupment.

Which ICD-10 Codes Support CPT 42826?

CPT 42826 is supported by diagnoses such as J35.01 for chronic tonsillitis, J35.1 for hypertrophy of tonsils, J03.91 for acute recurrent tonsillitis, J36 for peritonsillar abscess, and G47.33 for obstructive sleep apnea when tonsillar obstruction is documented. The diagnosis must match the reason surgery was medically necessary.

Hypertrophy coding deserves care. J35.1 reports enlarged tonsils alone, while J35.3 reports enlarged tonsils and adenoids together, which normally pairs with a combination code rather than 42826. Our ICD-10 code J35.3 billing guide explains when each applies. Searches for tonsillar hypertrophy and chronic adenotonsillitis codes are among the most common in ENT billing because these distinctions are easy to miss.

Infection history drives most adult tonsillectomies. Recurrent acute tonsillitis codes such as J03.91, or J03.01 for recurrent streptococcal tonsillitis, should be supported by a documented episode history with dates, findings, and treatment. Chronic tonsillitis (J35.01) and other chronic tonsil disease, including tonsil stones reported with J35.8, can support surgery when symptoms persist despite conservative care.

Obstruction is the other major indication. In adults, sleep study results documenting obstructive sleep apnea, coded G47.33, often accompany the surgical request. Check the latest code set changes in our FY 2027 ICD-10-CM ENT update before finalizing diagnosis rules in your charge master, and link each diagnosis to the procedure line it supports on the claim.

The most common issue we see providers run into is a surgical claim that lists only a symptom code, such as sore throat, when the chart supports a specific chronic or recurrent diagnosis.

What Documentation Do Payers Require for Tonsillectomy?

Payers generally require documentation of the indication for tonsillectomy, such as the number and dates of tonsillitis episodes with treatment, a peritonsillar abscess history, or a sleep study and exam findings showing obstruction. Many commercial and Medicare Advantage plans also require prior authorization for adult tonsillectomy.

Episode frequency is the standard many payers borrow from clinical guidance. The American Academy of Otolaryngology Head and Neck Surgery’s clinical practice guideline on tonsillectomy in children describes recurrent throat infection as at least seven episodes in one year, five per year for two years, or three per year for three years, each documented in the medical record. Adult policies vary, but payers often expect a similar documented history rather than a summary statement.

Strong documentation includes the date of each episode, temperature or exam findings, culture or rapid strep results, antibiotics prescribed, missed work or school, and failed conservative treatment. For obstruction, include tonsil size on exam, sleep study results when available, and symptoms such as snoring, witnessed apneas, or dysphagia.

Prior authorization requirements are shifting. Some payers are removing authorization for selected services while tightening others, as covered in our report on UnitedHealthcare prior authorization changes for ENT procedures. Verify each plan’s current list before scheduling, and record the authorization number on the claim along with the approved date range.

Providers often come to us after a tonsillectomy denial for missing medical necessity, when the episode history existed in scattered visit notes but never made it into the surgical request.

Modifiers and Global Period for CPT 42826

CPT 42826 carries a 90-day global period on the Medicare Physician Fee Schedule, so routine postoperative visits are included in the surgical payment. The decision for surgery visit can be billed separately, typically with modifier 57 when the decision is made the day before or day of the procedure. An unrelated problem treated during the global period needs modifier 24 on the E/M service.

Post-tonsillectomy bleeding is the classic global period scenario. When a patient returns to the operating room to control hemorrhage, report the appropriate code from 42960 to 42962 with modifier 78 for an unplanned return to the operating room for a related complication. Payment under modifier 78 is typically limited to the intraoperative portion, so documentation of the bleed and the intervention matters. Bleeding controlled in the office is a different service than an operating room return, so choose the hemorrhage code that matches where and how the bleeding was treated.

Same-day procedures need clear rules. A tonsillectomy performed with myringotomy and tubes is reported with both codes and modifier 51 on the secondary procedure where the payer requires it; see our CPT 69436 billing guide. Adult patients sometimes undergo tonsillectomy with septoplasty, covered in our CPT 30520 septoplasty guide. Tonsillectomy is commonly bundled into uvulopalatopharyngoplasty (42145), so check NCCI edits before reporting both.

In the office, an E/M visit on the same day as a minor procedure needs modifier 25, which faces payment changes described in our ENT modifier 25 payment cut guide.

Why Do Tonsillectomy Claims Get Denied?

Tonsillectomy claims are denied most often for the wrong age code, unbundled tonsillectomy and adenoidectomy codes, missing prior authorization, weak medical necessity documentation, symptom-only diagnoses, and global period conflicts when a patient returns for bleeding or follow-up care.

These are the six errors that show up most often on tonsillectomy claims:

1. Billing the wrong age code. Reporting 42826 for an 11-year-old, or 42825 for a 12-year-old, triggers an age edit denial.
2. Unbundling combination codes. Reporting 42826 plus 42831 instead of 42821 when both procedures were done together.
3. Skipping prior authorization. Scheduling an adult tonsillectomy without confirming the plan’s authorization requirement.
4. Listing symptoms only. Using sore throat or snoring codes when the chart supports chronic tonsillitis or obstructive sleep apnea.
5. Missing modifier 78. Billing a return to the OR for bleeding without the modifier, which the payer treats as global care.
6. Adding modifier 50. Appending a bilateral modifier to a code that already describes both tonsils.

A short pre-submission review that checks these six points catches most of them, and it costs far less than reworking denials after the fact.

Here is what that costs. Consider a hypothetical ENT group performing 15 adult tonsillectomies a month at an illustrative surgeon allowed amount of $500. If one in five claims denies and half of those are never recovered, the group loses about $750 a month, or $9,000 a year, on one procedure. The figures are illustrative, but our guide to common ENT billing mistakes shows these errors repeat across practices.

Should You Outsource ENT Billing?

Tonsillectomy is a high-volume surgery with age-based coding, combination codes, prior authorization, and a 90-day global period. A biller handling general claims may know the procedure but miss that 42826 and 42825 split at age 12, that 42821 replaces two codes, or that bleeding returns need modifier 78. For ENT groups performing tonsillectomies every week, those gaps add up.

Keeping billing in-house works when a coder has current ENT surgical experience, authorizations are tracked before scheduling, and denials are worked within days. When those pieces are missing, a specialized partner usually recovers more than it costs. Ask any prospective billing company how it handles combination codes, how it tracks global periods, and how quickly it appeals medical necessity denials. Ask for sample denial reports from current ENT clients before you sign. Our guide on how to find the right ENT medical billing service walks through the evaluation.

Many billing companies in our network work inside the systems ENT practices already use, including Modernizing Medicine EMA, Nextech, Tebra, athenahealth, eClinicalWorks, and Epic. ENT Billing Services is part of the Billing Service Quotes network, which has matched more than 2,000 providers across all 50 states, brings over 15 years of industry experience, and offers billing rates starting as low as 2.95%. Requests are reviewed by a real person, including Tim Daniels, Director of Strategic Accounts at Billing Service Quotes, who helps ENT practices connect with billing companies that understand surgical billing. Most practices are matched in as little as 30 minutes at no cost.

Frequently Asked Questions

Next Steps

Coding enlarged tonsils and adenoids? Review our ICD-10 code J35.3 billing guide.

Adding ear tubes to the case? Read the CPT 69436 billing guide.

Reducing surgical denials? See our list of common ENT billing mistakes.