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CPT 62165: Endoscopic Transnasal Transsphenoidal Pituitary Tumor Resection

CPT code 62165 represents endoscopic transnasal transsphenoidal resection of pituitary tumors using a neuroendoscope. This procedure is a minimally invasive neurosurgical approach to remove abnormal pituitary growths through the nasal cavity or sphenoidal sinuses, and it plays an important role in treating pituitary adenomas and other sellar lesions that affect endocrine and neurologic function. Nationally, this code matters because it captures a complex, resource-intensive operative service with implications for surgical scheduling, facility requirements, and perioperative care pathways.

Key payers in the analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise overview of the clinical context for 62165, the typical site of service, and the service type. The publication also provides benchmarking and reimbursement context where available, summaries of common modifiers, and notes on coding relationships and policy updates affecting endoscopic pituitary surgery reimbursement. This information is intended for billing professionals, surgical program managers, and policy analysts seeking a national-level summary of clinical and billing considerations linked to CPT code 62165.

Data not available in the input for associated taxonomies, specific ICD-10 pairings, and payer-specific fee schedules.

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Billing Code Overview

CPT code 62165 describes a neurosurgical procedure in which a small neuroendoscope is used to access the pituitary gland to remove an abnormal growth. The provider approaches the pituitary through the nasal cavity or the sphenoidal sinuses.

Service type: Endoscopic transnasal transsphenoidal pituitary tumor resection
Typical site of service: Operating room or ambulatory surgery center, with intraoperative endoscopic equipment and neurosurgical support

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CPT 62165: Endoscopic Transnasal Transsphenoidal Pituitary Tumor Resection

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Billing Code Overview

Service type: Endoscopic transnasal transsphenoidal pituitary tumor resection
Typical site of service: Operating room or ambulatory surgery center, with intraoperative endoscopic equipment and neurosurgical support

Clinical & Coding Specifications

Clinical Context

A typical patient is a 45-year-old adult presenting with progressive headaches, visual field deficits (classically bitemporal hemianopsia), and hormonal abnormalities such as hyperprolactinemia or secondary hypogonadism. Neuroimaging (MRI pituitary with contrast) demonstrates a pituitary macroadenoma centered in the sella turcica with suprasellar extension. Endocrinology evaluation documents hormonal dysfunction and neurosurgical consultation recommends surgical resection. The clinical workflow includes preoperative endocrine optimization and vision assessment, pre‑anesthesia evaluation, intraoperative neuronavigation and endoscopic transnasal transsphenoidal approach using a neuroendoscope to access the sphenoid sinus and sella, tumor debulking or gross total resection, reconstruction of the skull base as needed, and postoperative monitoring in a PACU or neurosurgical step‑down unit with endocrine and ophthalmologic follow‑up. Typical site of service is an inpatient hospital operating room or ambulatory surgery center when appropriate. The service type is a neurosurgical endoscopic transnasal transsphenoidal pituitary surgery coded by 62165.

Coding Specifications

Modifier	Description	When to Use
`22`	Increased procedural services	Use when work required is substantially greater than typically required for `62165` due to complexity (extensive tumor adhesion, prolonged operative time) and fully documented.
`23`	Unusual anesthesia	Use when general anesthesia is medically contraindicated and an unusual anesthesia technique is required and documented.
`26`	Professional component	Use when reporting only the professional component of a separate, reportable service (rare for operative CPT `62165`).
`50`	Bilateral procedure	Use only if identical bilateral transnasal approaches are performed and payer allows bilateral reporting for the specific service.
`51`	Multiple procedures	Use when `62165` is reported with additional distinct procedures during the same operative session (e.g., concurrent cranial procedure).
`52`	Reduced services	Use when the procedure is partially reduced or not completed as planned and documentation supports partial performance.
`53`	Discontinued procedure	Use when the procedure is terminated due to patient safety or unforeseen circumstances prior to completion.
`62`	Two surgeons	Use when two surgeons are required to work together as primary surgeons throughout substantial portions of the procedure and documentation explains the necessity.
`63`	Procedure performed on infants less than 4 kg	Use when patient meets age/weight criteria and payer requires this modifier for neonatal cases.
`66`	Surgical team	Use when the surgical team approach is used and payer permits team reporting for the service.
`78`	Return to OR for related procedure during global period	Use when patient returns to the operating room for a related procedure during the global postoperative period.
`79`	Unrelated procedure or service by the same physician during global period	Use when an unrelated procedure is performed by the same provider during the global period.
`80`	Assistant surgeon	Use when an assistant surgeon provides surgical assistance and documentation supports the assistant's role.
`AS`	Physician assistant, nurse practitioner, or clinical nurse specialist services for assistant at surgery	Use when a qualifying nonphysician assistant participates and billing rules permit `AS` for the payer.

Taxonomy Code	Specialty	Notes
207XS0107X	Neurological Surgery	Primary specialty performing endoscopic transsphenoidal pituitary surgery.
207H00000X	Neurocritical Care / Neurosurgery	Neurosurgery subspecialists with skull base expertise.
207L00000X	Otolaryngology (ENT)	Rhinologic and skull base surgeons often perform or co‑manage the endonasal approach.
207K00000X	Ophthalmology	Provides pre/postoperative visual field assessment and follow‑up.
2084P0800X	Endocrinology	Manages preoperative and postoperative hormonal assessment and replacement.

Related Diagnoses

ICD-10 Code	Description	Clinical Relevance
`D35.2`	Benign neoplasm of pituitary gland	Represents pituitary adenomas commonly treated with transsphenoidal resection.
`E22.0`	Acromegaly and pituitary gigantism	Caused by GH-secreting pituitary adenoma; surgical resection is primary therapy.
`E22.1`	Syndrome of inappropriate secretion of antidiuretic hormone (SIADH)	Pituitary/parasellar lesions can affect endocrine regulation; SIADH may be encountered perioperatively.
`E23.0`	Hypopituitarism	May be a presenting feature or postoperative outcome requiring endocrine management.
`E24.0`	Cushing's disease due to pituitary adenoma	ACTH-secreting pituitary adenomas treated with transsphenoidal surgery.
`H46`	Optic chiasm and visual pathway disorders (use more specific codes such as H53.4 for visual field defects)	Visual field compromise from suprasellar extension indicating need for decompression.
`C75.1`	Malignant neoplasm of pituitary gland	Rare malignant lesions of pituitary that may require surgical intervention.

Related CPT Codes

CPT Code	Description	Relationship to This Procedure
`61600`	Craniectomy or craniotomy for tumor, supratentorial; intracranial, for tumor excision	Alternative open cranial approach for pituitary region tumors when endoscopic transnasal approach is not feasible.
`62167`	Stereotactic radiosurgery, cranial target; per fraction (e.g., Gamma Knife)	Adjunct or alternative for residual or recurrent pituitary adenoma tissue not amenable to resection.
`63030`	Laminectomy, single vertebral segment; for tumor, extramedullary or intradural	Example of other neurosurgical tumor procedures that may be performed in separate sessions; used for coding workflow when concurrent spinal tumor procedures occur.
`76000`	Fluoroscopic guidance for needle placement (eg, biopsy, injection)	Intraoperative image guidance or fluoroscopy may be billed separately if specific guidance procedures are performed and meet billing criteria.
`99223`	Initial hospital care, typically 70 minutes or more	Common hospital inpatient evaluation and management code for the admitting neurosurgical service on the day of major surgery.

CPT 62160: Endoscopic Ventricular Catheter Placement or Replacement

CPT-62161-ENDOSCOPIC-INTRACRANIAL-CYST-ADHESION-REMOVAL-VENTRICULAR-CATHETER

CPT 62161: Endoscopic Intracranial Cyst/Adhesion Removal with Ventricular Catheter

CPT-62162-ENDOSCOPIC-COLLOID-CYST-RESECTION-WITH-VENTRICULAR-DRAINAGE

CPT 62162: Endoscopic Colloid Cyst Resection with Ventricular Drainage

CPT-62164-ENDOSCOPIC-BRAIN-TUMOR-RESECTION-WITH-VENTRICULAR-DRAINAGE

CPT 62164: Endoscopic Brain Tumor Resection with Ventricular Drainage

References

1.CPT® Codes and Descriptions. AAPC. Retrieved Aug 11, 2026.Maintains the CPT code set's official descriptions and guidelines, licensed from the American Medical Association, used as the definitional source for CPT codes on this page.
2.HCPCS Quarterly Update. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's quarterly release of HCPCS Level II codes and short/long descriptors, the source for HCPCS code definitions and update history.
3.ICD-10-CM Full Code List. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's complete ICD-10-CM diagnosis code list, used to cross-reference diagnosis codes associated with this procedure or service.

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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.

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Clinical & Coding Specifications

Clinical Context

Coding Specifications

Modifier	Description	When to Use
`22`	Increased procedural services	Use when work required is substantially greater than typically required for `62165` due to complexity (extensive tumor adhesion, prolonged operative time) and fully documented.
`23`	Unusual anesthesia	Use when general anesthesia is medically contraindicated and an unusual anesthesia technique is required and documented.
`26`	Professional component	Use when reporting only the professional component of a separate, reportable service (rare for operative CPT `62165`).
`50`	Bilateral procedure	Use only if identical bilateral transnasal approaches are performed and payer allows bilateral reporting for the specific service.
`51`	Multiple procedures	Use when `62165` is reported with additional distinct procedures during the same operative session (e.g., concurrent cranial procedure).
`52`	Reduced services	Use when the procedure is partially reduced or not completed as planned and documentation supports partial performance.
`53`	Discontinued procedure	Use when the procedure is terminated due to patient safety or unforeseen circumstances prior to completion.
`62`	Two surgeons	Use when two surgeons are required to work together as primary surgeons throughout substantial portions of the procedure and documentation explains the necessity.
`63`	Procedure performed on infants less than 4 kg	Use when patient meets age/weight criteria and payer requires this modifier for neonatal cases.
`66`	Surgical team	Use when the surgical team approach is used and payer permits team reporting for the service.
`78`	Return to OR for related procedure during global period	Use when patient returns to the operating room for a related procedure during the global postoperative period.
`79`	Unrelated procedure or service by the same physician during global period	Use when an unrelated procedure is performed by the same provider during the global period.
`80`	Assistant surgeon	Use when an assistant surgeon provides surgical assistance and documentation supports the assistant's role.
`AS`	Physician assistant, nurse practitioner, or clinical nurse specialist services for assistant at surgery	Use when a qualifying nonphysician assistant participates and billing rules permit `AS` for the payer.

Taxonomy Code	Specialty	Notes
207XS0107X	Neurological Surgery	Primary specialty performing endoscopic transsphenoidal pituitary surgery.
207H00000X	Neurocritical Care / Neurosurgery	Neurosurgery subspecialists with skull base expertise.
207L00000X	Otolaryngology (ENT)	Rhinologic and skull base surgeons often perform or co‑manage the endonasal approach.
207K00000X	Ophthalmology	Provides pre/postoperative visual field assessment and follow‑up.
2084P0800X	Endocrinology	Manages preoperative and postoperative hormonal assessment and replacement.

Related Diagnoses

ICD-10 Code	Description	Clinical Relevance
`D35.2`	Benign neoplasm of pituitary gland	Represents pituitary adenomas commonly treated with transsphenoidal resection.
`E22.0`	Acromegaly and pituitary gigantism	Caused by GH-secreting pituitary adenoma; surgical resection is primary therapy.
`E22.1`	Syndrome of inappropriate secretion of antidiuretic hormone (SIADH)	Pituitary/parasellar lesions can affect endocrine regulation; SIADH may be encountered perioperatively.
`E23.0`	Hypopituitarism	May be a presenting feature or postoperative outcome requiring endocrine management.
`E24.0`	Cushing's disease due to pituitary adenoma	ACTH-secreting pituitary adenomas treated with transsphenoidal surgery.
`H46`	Optic chiasm and visual pathway disorders (use more specific codes such as H53.4 for visual field defects)	Visual field compromise from suprasellar extension indicating need for decompression.
`C75.1`	Malignant neoplasm of pituitary gland	Rare malignant lesions of pituitary that may require surgical intervention.

Related CPT Codes

CPT Code	Description	Relationship to This Procedure
`61600`	Craniectomy or craniotomy for tumor, supratentorial; intracranial, for tumor excision	Alternative open cranial approach for pituitary region tumors when endoscopic transnasal approach is not feasible.
`62167`	Stereotactic radiosurgery, cranial target; per fraction (e.g., Gamma Knife)	Adjunct or alternative for residual or recurrent pituitary adenoma tissue not amenable to resection.
`63030`	Laminectomy, single vertebral segment; for tumor, extramedullary or intradural	Example of other neurosurgical tumor procedures that may be performed in separate sessions; used for coding workflow when concurrent spinal tumor procedures occur.
`76000`	Fluoroscopic guidance for needle placement (eg, biopsy, injection)	Intraoperative image guidance or fluoroscopy may be billed separately if specific guidance procedures are performed and meet billing criteria.
`99223`	Initial hospital care, typically 70 minutes or more	Common hospital inpatient evaluation and management code for the admitting neurosurgical service on the day of major surgery.

CPT 62160: Endoscopic Ventricular Catheter Placement or Replacement

CPT-62161-ENDOSCOPIC-INTRACRANIAL-CYST-ADHESION-REMOVAL-VENTRICULAR-CATHETER

CPT 62161: Endoscopic Intracranial Cyst/Adhesion Removal with Ventricular Catheter

CPT-62162-ENDOSCOPIC-COLLOID-CYST-RESECTION-WITH-VENTRICULAR-DRAINAGE

CPT 62162: Endoscopic Colloid Cyst Resection with Ventricular Drainage

CPT-62164-ENDOSCOPIC-BRAIN-TUMOR-RESECTION-WITH-VENTRICULAR-DRAINAGE

CPT 62164: Endoscopic Brain Tumor Resection with Ventricular Drainage

References

1.CPT® Codes and Descriptions. AAPC. Retrieved Aug 11, 2026.Maintains the CPT code set's official descriptions and guidelines, licensed from the American Medical Association, used as the definitional source for CPT codes on this page.
2.HCPCS Quarterly Update. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's quarterly release of HCPCS Level II codes and short/long descriptors, the source for HCPCS code definitions and update history.
3.ICD-10-CM Full Code List. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's complete ICD-10-CM diagnosis code list, used to cross-reference diagnosis codes associated with this procedure or service.

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CPT 62165: Endoscopic Transnasal Transsphenoidal Pituitary Tumor Resection

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Billing Code Overview

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CPT 62165: Endoscopic Transnasal Transsphenoidal Pituitary Tumor Resection

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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