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CPT 42509: Parotid Duct Rerouting with Bilateral Submandibular Gland Excision

CPT code 42509 denotes a Wilke-type procedure involving parotid duct rerouting with excision of both submandibular glands, a surgical treatment commonly used to address sialorrhea (drooling). Nationally, this code represents specialized head and neck surgery performed by otolaryngology or oral and maxillofacial surgery teams in operating rooms or ambulatory surgical centers. Its use is relevant for clinical management of severe drooling that does not respond to conservative measures and for payers managing coverage for complex surgical interventions.

Key payers referenced include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise clinical and billing profile of CPT code 42509, including the service type, typical site of service, common payer coverage considerations, and the context in which the procedure is performed. The publication summarizes benchmarks where available, highlights relevant policy considerations for national payers, and provides clinical context for coding and billing teams. Data not available in the input will be noted explicitly where applicable.

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Billing Code Overview

CPT code 42509 describes a Wilke-type procedure (parotid duct rerouting) with excision of both submandibular glands. This surgical procedure is typically performed to manage sialorrhea (drooling) by redirecting salivary flow and removing submandibular gland tissue.

Service type: Surgical procedure, otolaryngology/head and neck surgery.

Typical site of service: Hospital operating room or ambulatory surgical center, depending on patient complexity and inpatient requirements.

Data not available in the input.

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CPT 42509: Parotid Duct Rerouting with Bilateral Submandibular Gland Excision

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Billing Code Overview

Service type: Surgical procedure, otolaryngology/head and neck surgery.

Typical site of service: Hospital operating room or ambulatory surgical center, depending on patient complexity and inpatient requirements.

Data not available in the input.

Clinical & Coding Specifications

Clinical Context

A 12-year-old child with severe neurodevelopmental disability and refractory sialorrhea is evaluated for surgical management after failed conservative measures (behavioral therapy, anticholinergic medication, botulinum toxin injections). The multidisciplinary team includes pediatric otolaryngology, speech-language pathology, and anesthesia. Preoperative assessment documents frequent aspiration events, skin breakdown around the mouth, and social impairment from drooling. Imaging and physical exam confirm salivary gland anatomy appropriate for a Wilke-type procedure.

The operative plan is a parotid duct rerouting with excision of both submandibular glands (CPT 42509) performed under general endotracheal anesthesia in an outpatient or short-stay hospital setting depending on comorbidities. Intraoperative steps include bilateral submandibular gland excision, identification and rerouting of the parotid (Stensen) ducts, hemostasis, and layered closure. Postoperative workflow includes PACU monitoring for airway compromise, pain control, swallow evaluation by speech therapy, and instruction for wound care. Expected disposition is same-day discharge for uncomplicated patients or overnight observation for those with respiratory or medical complexity. Follow-up is arranged at 1–2 weeks for wound check and 6–12 weeks for functional assessment of drooling reduction.

Coding Specifications

Modifier	Description	When to Use
`00`	No modifier—standard reporting	Routine reporting when no modifier applies
`22`	Increased procedural services	Documented unusually extensive procedure or operative time beyond typical for `CPT 42509`
`23`	Unusual anesthesia	Used when medically necessary, medically documented, and more anesthesia is required due to patient condition
`26`	Professional component	If reporting separate professional component distinct from technical facility billing (rare for this surgical code)
`50`	Bilateral procedure	If circumstances require separate bilateral reporting beyond the single code conventions (use with payer guidance)
`51`	Multiple procedures	When `CPT 42509` is billed with additional separate procedures during same operative session to indicate multiple procedure reduction rules may apply
`52`	Reduced services	When procedure is partially reduced or not completed as planned with proper documentation
`59`	Distinct procedural service	When another performed procedure is distinct and separate from `CPT 42509` (different session or distinct anatomical site)
`62`	Two surgeons	When two surgeons from different specialties perform distinct portions of the procedure and documentation supports shared performance
`73`	Discontinued outpatient/ambulatory prior to anesthesia	If planned outpatient `CPT 42509` is discontinued before anesthesia administration
`78`	Return to the operating room for a related procedure during postoperative period	For example, re-exploration for hematoma or wound issue related to the original `CPT 42509`
`80`	Assistant surgeon	When an assistant surgeon (not a resident) provides assistance documented during `CPT 42509`

Taxonomy Code	Specialty	Notes
`207W00000X`	Otolaryngology	Primary specialty performing parotid duct rerouting and submandibular gland excision
`207L00000X`	Pediatric Otolaryngology	Subspecialists frequently manage complex pediatric sialorrhea cases
`208000000X`	General Surgery	General surgeons with head and neck experience may perform these procedures in some settings
`2084P0800X`	Oral and Maxillofacial Surgery	Occasionally involved for glandular and ductal procedures involving oral cavity anatomy
`2084N0400X`	Plastic and Reconstructive Surgery	May participate in complex reconstructive aspects or wound management

Related Diagnoses

ICD-10 Code	Description	Clinical Relevance
`R63.2`	Abnormal weight gain	May be present in patients with neurologic conditions affecting feeding and drooling patterns; supportive care consideration
`R09.81`	Nasal congestion	Symptom that can accompany upper airway issues but not a primary indication for `CPT 42509`
`R19.4`	Change in bowel habit	General medical comorbidity; not specific to sialorrhea management
`F82`	Specific developmental disorder of motor function	Neurologic conditions with oromotor dysfunction commonly associated with sialorrhea prompting surgical intervention
`R40.0`	Somnolence (drowsiness)	May be documented in patients with neurologic impairment contributing to drooling risk and aspiration concerns

Related CPT Codes

CPT Code	Description	Relationship to This Procedure
`42630`	Excision of submandibular gland, unilateral	May be used if only one submandibular gland is excised rather than bilateral when documenting laterality or staged procedures
`42633`	Excision of submandibular gland, bilateral	Alternative code when both submandibular glands are excised without parotid duct rerouting; could be reported with or instead of `CPT 42509` depending on services performed
`42820`	Ligation or transection of salivary duct	Performed when ductal interruption or ligation is chosen instead of or in addition to parotid duct rerouting
`42440`	Partial parotidectomy, primary, superficial	May be performed if parotid gland tissue requires excision during ductal rerouting or for concurrent pathology
`42800`	Sialolithotomy; intraoral, with removal of calculus	Performed when a salivary stone is encountered and removed during operative management of salivary disorders

CPT 42500: Primary or Simple Repair of Salivary Gland

CPT-42505-SECONDARY-COMPLICATED-SALIVARY-GLAND-REPAIR

CPT 42505: Secondary or Complicated Repair of Salivary Gland

CPT-42507-PAROTID-DUCT-REROUTING-WILKE-PROCEDURE

CPT 42507: Parotid Duct Rerouting (Wilke Procedure)

CPT-42510-PAROTID-DUCT-REROUTING-WHARTONS-DUCT-LIGATION-SIALORRHEA

CPT 42510: Parotid Duct Rerouting with Wharton's Duct Ligation

References

1.CPT® Codes and Descriptions. AAPC. Retrieved Jul 29, 2026.
2.HCPCS Quarterly Update. Centers for Medicare & Medicaid Services (CMS). Retrieved Jul 29, 2026.
3.ICD-10-CM Full Code List. Centers for Medicare & Medicaid Services (CMS). Retrieved Jul 29, 2026.

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Trek Health ingests and normalizes Transparency in Coverage data and payer policy updates to give provider organizations a clear view of how commercial reimbursement behaves across markets, payers, and services. Our platform transforms raw payer disclosures into structured intelligence that supports contract evaluation, payer negotiations, and service line strategy. By combining market benchmarks with ongoing policy visibility, Trek helps teams identify variability, risk, and opportunity in commercial reimbursement. The result is faster insight, stronger negotiating positions, and more informed financial decisions.

Clinical & Coding Specifications

Clinical Context

Coding Specifications

Modifier	Description	When to Use
`00`	No modifier—standard reporting	Routine reporting when no modifier applies
`22`	Increased procedural services	Documented unusually extensive procedure or operative time beyond typical for `CPT 42509`
`23`	Unusual anesthesia	Used when medically necessary, medically documented, and more anesthesia is required due to patient condition
`26`	Professional component	If reporting separate professional component distinct from technical facility billing (rare for this surgical code)
`50`	Bilateral procedure	If circumstances require separate bilateral reporting beyond the single code conventions (use with payer guidance)
`51`	Multiple procedures	When `CPT 42509` is billed with additional separate procedures during same operative session to indicate multiple procedure reduction rules may apply
`52`	Reduced services	When procedure is partially reduced or not completed as planned with proper documentation
`59`	Distinct procedural service	When another performed procedure is distinct and separate from `CPT 42509` (different session or distinct anatomical site)
`62`	Two surgeons	When two surgeons from different specialties perform distinct portions of the procedure and documentation supports shared performance
`73`	Discontinued outpatient/ambulatory prior to anesthesia	If planned outpatient `CPT 42509` is discontinued before anesthesia administration
`78`	Return to the operating room for a related procedure during postoperative period	For example, re-exploration for hematoma or wound issue related to the original `CPT 42509`
`80`	Assistant surgeon	When an assistant surgeon (not a resident) provides assistance documented during `CPT 42509`

Taxonomy Code	Specialty	Notes
`207W00000X`	Otolaryngology	Primary specialty performing parotid duct rerouting and submandibular gland excision
`207L00000X`	Pediatric Otolaryngology	Subspecialists frequently manage complex pediatric sialorrhea cases
`208000000X`	General Surgery	General surgeons with head and neck experience may perform these procedures in some settings
`2084P0800X`	Oral and Maxillofacial Surgery	Occasionally involved for glandular and ductal procedures involving oral cavity anatomy
`2084N0400X`	Plastic and Reconstructive Surgery	May participate in complex reconstructive aspects or wound management

Related Diagnoses

ICD-10 Code	Description	Clinical Relevance
`R63.2`	Abnormal weight gain	May be present in patients with neurologic conditions affecting feeding and drooling patterns; supportive care consideration
`R09.81`	Nasal congestion	Symptom that can accompany upper airway issues but not a primary indication for `CPT 42509`
`R19.4`	Change in bowel habit	General medical comorbidity; not specific to sialorrhea management
`F82`	Specific developmental disorder of motor function	Neurologic conditions with oromotor dysfunction commonly associated with sialorrhea prompting surgical intervention
`R40.0`	Somnolence (drowsiness)	May be documented in patients with neurologic impairment contributing to drooling risk and aspiration concerns

Related CPT Codes

CPT Code	Description	Relationship to This Procedure
`42630`	Excision of submandibular gland, unilateral	May be used if only one submandibular gland is excised rather than bilateral when documenting laterality or staged procedures
`42633`	Excision of submandibular gland, bilateral	Alternative code when both submandibular glands are excised without parotid duct rerouting; could be reported with or instead of `CPT 42509` depending on services performed
`42820`	Ligation or transection of salivary duct	Performed when ductal interruption or ligation is chosen instead of or in addition to parotid duct rerouting
`42440`	Partial parotidectomy, primary, superficial	May be performed if parotid gland tissue requires excision during ductal rerouting or for concurrent pathology
`42800`	Sialolithotomy; intraoral, with removal of calculus	Performed when a salivary stone is encountered and removed during operative management of salivary disorders

CPT 42500: Primary or Simple Repair of Salivary Gland

CPT-42505-SECONDARY-COMPLICATED-SALIVARY-GLAND-REPAIR

CPT 42505: Secondary or Complicated Repair of Salivary Gland

CPT-42507-PAROTID-DUCT-REROUTING-WILKE-PROCEDURE

CPT 42507: Parotid Duct Rerouting (Wilke Procedure)

CPT-42510-PAROTID-DUCT-REROUTING-WHARTONS-DUCT-LIGATION-SIALORRHEA

CPT 42510: Parotid Duct Rerouting with Wharton's Duct Ligation

References

1.CPT® Codes and Descriptions. AAPC. Retrieved Jul 29, 2026.
2.HCPCS Quarterly Update. Centers for Medicare & Medicaid Services (CMS). Retrieved Jul 29, 2026.
3.ICD-10-CM Full Code List. Centers for Medicare & Medicaid Services (CMS). Retrieved Jul 29, 2026.

Published by

Trek Health powers OpenPayer with a leading commercial payer intelligence platform, seamlessly converting fragmented payer data into actionable insights for provider organizations.

OpenPayer

CPT 42509: Parotid Duct Rerouting with Bilateral Submandibular Gland Excision

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Billing Code Overview

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CPT 42509: Parotid Duct Rerouting with Bilateral Submandibular Gland Excision

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Billing Code Overview

Clinical & Coding Specifications

Clinical Context

Coding Specifications

Related Diagnoses

Related CPT Codes

Related Codes

References

Clinical & Coding Specifications

Clinical Context

Coding Specifications

Related Diagnoses

Related CPT Codes

Related Codes

References