adenoidectomy

DEFINITION of adenoidectomy

adenoidectomy is the surgical excision of the adenoid gland, also called the pharyngeal tonsil, a mass of lymphoid tissue situated on the posterior wall of the nasopharynx above the soft palate. It is distinct from tonsillectomy, which removes the paired palatine tonsils at the back of the oral cavity; the two are frequently performed together as an adenotonsillectomy when both tissues are pathologically enlarged or infected. The procedure removes hyperplastic or chronically infected lymphoid tissue, most often via curettage, powered microdebrider, or coblation (radiofrequency) technique, typically performed transorally under general anesthesia with the adenoid pad visualized directly or via mirror/endoscope. Adenoid tissue is physiologically present and largest in early childhood as part of Waldeyer’s ring immune surveillance, involuting with age; pathological enlargement (adenoid hypertrophy, J35.2) or chronic inflammation (chronic adenoiditis, J35.02) causing nasal obstruction, mouth breathing, recurrent otitis media, or obstructive sleep apnea is what drives surgical indication. Clinically relevant subtypes for coding include primary adenoidectomy (first-time removal) versus secondary/revision adenoidectomy (regrowth or incomplete prior removal), and isolated adenoidectomy versus combined adenotonsillectomy. Adenoidectomy is most often confused with tonsillectomy — the key difference is anatomic site and visibility (adenoid tissue is not visible on routine oral exam, unlike the palatine tonsils) — and with adenoiditis, which is inflammation/infection of the tissue rather than its surgical removal.

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ETYMOLOGY of adenoidectomy

greek

Component	Origin	Meaning
aden- / adeno-	Greek ἀδήν (adḗn)	“gland” — combining form denoting glandular or gland-like tissue
-oid	Greek -oeidēs, from eidos (εἶδος, “form, shape”)	“resembling,” “shaped like” — adjectival/derivational suffix
-ectomy	Greek ektomē (ἐκτομή), from ek- (“out”) + temnein (τέμνειν, “to cut”)	Noun-forming suffix — “excision,” “surgical removal (of)”

The word entered English as the adjective adenoid (“gland-shaped”) in the early 1800s, describing the resemblance of lymphoid tissue clusters to glands, though the tissue itself is not a true secretory gland. The noun adenoids, referring specifically to the enlarged pharyngeal tonsil visible on nasopharyngeal exam, was popularized in the 1860s by Danish physician Wilhelm Meyer, who first described its clinical significance in chronic nasal obstruction. Adenoidectomy was formed in the early 1900s by appending the surgical suffix -ectomy once removal of the tissue became a standardized procedure. The root aden- (“gland”) connects adenoidectomy to the entire aden- root family: adenopathy (gland + disease/suffering — swollen lymph nodes), adenitis (gland + inflammation), and adenocarcinoma (gland + malignant tumor of glandular epithelium). The suffix -ectomy is highly productive in surgical terminology, appearing in tonsillectomy, appendectomy, mastectomy, and nephrectomy.

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🔀 ALIASES / ALTERNATE TERMS

• Adenoidal (adjective form — e.g., “adenoidal facies,” “adenoidal breathing,” “adenoidal speech/voice”)
• Adenoid removal / adenoid excision (lay and clinical synonym; used interchangeably in operative documentation)
• Primary adenoidectomy (first-time surgical removal of the adenoid; CPT 42830/42831)
• Secondary (revision) adenoidectomy (repeat removal for regrowth or incomplete prior excision; CPT 42835/42836)
• Adenotonsillectomy / T&A (combined removal of adenoids and palatine tonsils; CPT 42820/42821)
• Curettage adenoidectomy (traditional technique using an adenoid curette to shave tissue from the nasopharynx)
• Powered/microdebrider adenoidectomy (technique using a rotary shaving instrument for more precise, complete removal)
• Coblation adenoidectomy (radiofrequency-based technique using controlled ablation at lower tissue temperatures)
• Endoscopic-assisted adenoidectomy (technique using nasal endoscopy to visualize and confirm complete removal, particularly of superior/lateral adenoid remnants)
• Adenoid hypertrophy (pathologic enlargement of adenoid tissue, most common surgical indication; J35.2)
• Chronic adenoiditis (chronic inflammation/infection of adenoid tissue, distinct indication from hypertrophy; J35.02)

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🔗 RELATED TERMS

• Tonsillectomy — removal of the paired palatine tonsils rather than the adenoid; often performed concurrently but coded and billed separately from isolated adenoidectomy; CPT 42825/42826
• Adenotonsillectomy — combined procedure removing both the adenoid and palatine tonsils in a single operative session; CPT 42820/42821
• Adenoiditis — shares the aden- root; acute or chronic infection/inflammation of adenoid tissue without necessarily indicating removal; chronic form coded J35.02
• Adenoid hypertrophy — pathologic enlargement of the adenoid pad; the leading indication for adenoidectomy, coded J35.2
• Obstructive sleep apnea — common comorbid diagnosis and surgical indication when adenoid (and/or tonsillar) hypertrophy causes upper airway obstruction; G47.33
• Otitis media with effusion — recurrent middle ear fluid/infection linked to eustachian tube dysfunction from adenoid hypertrophy; a frequent concurrent indication, coded within H65.2x/H66.9x
• Adenoid facies — clinical phenotype (chronic open-mouth breathing, elongated midface, high-arched palate) resulting from long-standing nasal airway obstruction by hypertrophied adenoid tissue
• Nasopharyngoscopy — key diagnostic endoscopic procedure used to directly visualize and grade adenoid tissue size preoperatively; CPT 92511
• Velopharyngeal insufficiency — rare postoperative complication of adenoidectomy involving incomplete closure between the soft palate and pharyngeal wall, causing hypernasal speech

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CODING CORNER

🏥 ICD-10-CM CODES

Chronic Tonsil/Adenoid Disease & Hypertrophy (J35.-)

Code	Description
J35.01	Chronic tonsillitis
J35.02	Chronic adenoiditis
J35.03	Chronic tonsillitis and adenoiditis
J35.1	Hypertrophy of tonsils
J35.2	Hypertrophy of adenoids
J35.3	Hypertrophy of tonsils with hypertrophy of adenoids
J35.8	Other chronic diseases of tonsils and adenoids
J35.9	Chronic disease of tonsils and adenoids, unspecified

Obstructive/Sleep-Disordered Breathing (Common Comorbid Indication)

Code	Description
G47.33	Obstructive sleep apnea (adult) (pediatric)
R06.83	Snoring

Otitis Media (Common Concurrent Indication)

Code	Description
H65.20	Chronic serous otitis media, unspecified ear
H65.23	Chronic serous otitis media, bilateral
H66.90	Otitis media, unspecified, unspecified ear

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🔧 COMMON CPT CODES (Adenoidectomy-Related Diagnosis & Treatment)

CPT Code	Description
42830	Adenoidectomy, primary; under age 12
42831	Adenoidectomy, primary; age 12 or over
42835	Adenoidectomy, secondary; under age 12
42836	Adenoidectomy, secondary; age 12 or over
42820	Tonsillectomy and adenoidectomy; under age 12
42821	Tonsillectomy and adenoidectomy; age 12 or over
42825	Tonsillectomy, primary or secondary; under age 12 (companion procedure, not adenoidectomy)
42826	Tonsillectomy, primary or secondary; age 12 or over (companion procedure, not adenoidectomy)
92511	Nasopharyngoscopy with endoscope, separate procedure (adjunct diagnostic; used to grade adenoid pad size preoperatively)

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⚠️ Coding Note: CPT selection hinges on two axes — patient age (under 12 vs. 12 or over) and primary vs. secondary (revision) status — so verify both from the op note before assigning 42830/42831 vs. 42835/42836; adenoid tissue has no laterality requirement, unlike many otolaryngology codes. When adenoidectomy and tonsillectomy are performed in the same session, use the combined codes 42820/42821 rather than reporting 42830/42831 and 42825/42826 separately — unbundling this is a common audit flag. Sequence the underlying indication (J35.2 hypertrophy, J35.02 chronic adenoiditis, or J35.3 combined hypertrophy) as the driving diagnosis for medical necessity; if obstructive sleep apnea (G47.33) or recurrent otitis media (H65.2x/H66.90) is also documented as a surgical indication, code it as an additional diagnosis to strengthen medical necessity, especially for payers requiring prior authorization for pediatric adenotonsillectomy. Watch for “adenoid hypertrophy” documented without laterality or grading — most payers, including Medicaid MCOs, want polysomnography results referenced when OSA is the stated indication, so a missing sleep study is a common query trigger. Revision/secondary adenoidectomy (42835/42836) is frequently undercoded as primary (42830/42831) when the operative note doesn’t clearly state prior adenoidectomy history — this distinction matters for both accurate coding and surgical outcome tracking.

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DERIVATIONS of adenoidectomy

TABLE definition AS Definition
FROM #medterm 
WHERE length(filter(roots, (word) => econtains([[adenoidectomy]].roots, word))) > 0 AND file.name != [[adenoidectomy]].file.name
SORT file.name ASC

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Query functionality

TABLE definition AS Definition
FROM #medterm 
WHERE length(filter(definition, (word) => econtains([[adenoidectomy]].definition, word))) > 0 AND file.name != [[adenoidectomy]].file.name

Med terms dictionary Appendix A Prefixes Appendix B Combining Forms Appendix C Suffixes Appendix D Suffix forms