Summary & Overview
CPT 42975: Endoscopic Airway Evaluation During Sedation
CPT code 42975 denotes an intraoperative endoscopic assessment of the upper airway performed after sedation to locate sites of obstruction in patients with sleep-disordered breathing, including obstructive sleep apnea. This diagnostic procedure informs surgical planning and targeted therapies by visualizing the palate, tongue base, and pharyngeal structures during a simulated sleep state. Nationally, accurate use and reporting of this CPT code matter for care coordination between sleep medicine, otolaryngology, and anesthesia teams and for capturing the clinical rationale for airway-directed interventions.
Key payers in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise overview of CPT code 42975, clinical context for when the procedure is performed, and the typical sites of service. The publication summarizes common billing considerations, available national benchmarks where applicable, and policy or reimbursement updates affecting the use of this code. It also outlines related clinical implications for procedural planning and expected documentation elements required to justify the intraoperative diagnostic assessment.
This summary is written for a national audience of clinicians, billing professionals, and policy analysts interested in procedural coding and the clinical management of sleep-disordered breathing.
Billing Code Overview
CPT code 42975 describes an intraoperative endoscopic evaluation of the upper airway performed after the patient has been sedated and is asleep. The provider advances an endoscope to assess the throat, palate, and tongue areas to identify sites of airway obstruction in patients with sleep-disordered breathing such as obstructive sleep apnea.
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Service type: Diagnostic intraoperative endoscopic airway evaluation under sedation
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Typical site of service: Operating room or procedure suite where monitored sedation or anesthesia is provided
Clinical & Coding Specifications
Clinical Context
A 48-year-old male with suspected obstructive sleep apnea (OSA) and persistent daytime sleepiness is referred for surgical evaluation after failure of or intolerance to continuous positive airway pressure (CPAP). Preoperative evaluation by an otolaryngologist and a sleep physician confirms obesity, loud snoring, and positional apneas documented on home sleep testing. The provider schedules an office- or ambulatory surgical-center–based procedure under monitored anesthesia care or general anesthesia.
During the procedure, after the patient is sedated and asleep, the surgeon introduces a flexible or rigid endoscope to evaluate the upper airway structures including the palate, tonsillar pillars, tongue base, and hypopharynx to identify the specific sites and patterns of airway collapse. Findings guide surgical planning (for example, uvulopalatopharyngoplasty, tongue-base reduction, or multi-level surgery) or non‑surgical interventions (oral appliances, positional therapy). The typical workflow includes pre-procedure consent and pre-anesthesia assessment, intra-procedure endoscopic examination with dynamic airway assessment during induced sleep or sedation, documentation of observed obstruction levels, and post-anesthesia recovery and discharge from an ambulatory setting or same-day hospital discharge when stable.
Typical site of service: Ambulatory surgical center or hospital outpatient department. Service type: Diagnostic endoscopic airway examination under sedation for evaluation of sleep-disordered breathing.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
11 | Office or other outpatient service | When this procedure is performed in the usual outpatient setting without unusual circumstances |
22 | Increased procedural services | When documentation supports substantially greater procedural effort or complexity than typical
23 | Unusual procedural services (unusual anesthesia circumstances) | When procedure performed under general anesthesia that is unusual for the service
52 | Reduced services | When the procedure is partially reduced or not completed as planned
53 | Discontinued procedure | When procedure is started but stopped due to extenuating circumstances or patient condition
59 | Distinct procedural service | When this endoscopic exam is distinct from other procedures performed the same day (use with appropriate linkage)
62 | Two surgeons | When two surgeons with different NPI numbers perform distinct portions of the procedure
76 | Repeat procedure by same physician (note: 76 not in provided list) | Data not available in the input.
79 | Unrelated procedure by same physician during postoperative period | When unrelated procedure performed during global period
AS | Physician assistant, nurse practitioner, or clinical nurse specialist services for anesthesia (not anesthesia modifier) | When advanced practice clinicians bill under certain payors; use per payor rules
CR | Catastrophe/disaster related | When service is related to a federally declared disaster
| Taxonomy Code | Specialty | Notes |
|---|---|---|
207QR0400X | Otolaryngology (ENT) | Primary specialty performing diagnostic sleep endoscopy and surgical planning |
207L00000X | Sleep Medicine Specialist | Interprets sleep study results and coordinates multidisciplinary management |
207R00000X | Anesthesiology | Provides sedation or general anesthesia and monitors airway during procedure |
Related Diagnoses
| ICD-10 Code | Description | Clinical Relevance |
|---|---|---|
G47.33 | Obstructive sleep apnea (adult) | Primary indication for diagnostic endoscopic airway evaluation to localize obstruction |
R06.83 | Snoring | Symptom commonly prompting further evaluation for sleep-disordered breathing
R06.02 | Shortness of breath | May be present and assessed to distinguish upper-airway vs cardiopulmonary causes
E66.9 | Obesity, unspecified | Major risk factor for OSA and contributes to multi-level airway collapse
J38.6 | Other diseases of vocal cords and larynx | May be assessed during endoscopy if laryngeal pathology contributes to symptoms
Related CPT Codes
| CPT Code | Description | Relationship to This Procedure |
|---|---|---|
31575 | Laryngoscopy, flexible or rigid; diagnostic, with stroboscopy when performed | May be used for additional laryngeal assessment during airway evaluation |
42145 | Palatopharyngoplasty (includes uvulopalatopharyngoplasty) | A common surgical treatment planned based on findings from the diagnostic endoscopic airway exam
41512 | Reduction, hypertrophic lingual tonsil, transoral, with or without lingual tonsillectomy | Performed when tongue-base or lingual tonsil hypertrophy is identified as an obstruction site
95810 | Polysomnography; sleep staging with 4 or more parameters of sleep, attended by technologist | Diagnostic sleep testing often precedes and informs the need for diagnostic endoscopic airway exam
31582 | Laryngoscopy, flexible fiberoptic; diagnostic, with evaluation of voice or swallowing | May be performed concurrently if assessment of dynamic airway and swallowing function is required