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CPT 61592: Orbitocranial Approach to Middle Cranial Fossa

CPT code 61592 describes an orbitocranial surgical approach to the middle cranial fossa involving zygomatic osteotomy, craniotomy, and elevation of the temporal lobe. This complex neurosurgical procedure is used to access lesions in and around the middle cranial fossa; approach selection is driven by lesion location and size. Nationally, the code is relevant to tertiary neurosurgical centers, academic hospitals, and specialty providers performing skull base and temporal lobe surgery.

Key payers covered in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find clinical context about the procedure, guidance on typical sites of service, and benchmarking content covering utilization and payment patterns where available. The publication also summarizes common billing considerations and the types of facilities and providers most likely to report CPT code 61592.

This executive summary prepares clinicians, coding professionals, and policy stakeholders to interpret how CPT code 61592 is used in practice, what services it represents, and where to look for payer-specific coverage and reimbursement details. Data not available in the input is noted where applicable in the full document.

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Billing Code Overview

CPT code 61592 describes a surgical approach to the middle cranial fossa using an orbitocranial approach. The procedure includes osteotomy of the zygoma, craniotomy, and extra‑ or intradural elevation of the temporal lobe. Selection of this approach depends on the location and size of the lesion targeted during neurosurgical intervention.

Service Type: Open cranial surgical approach to the middle cranial fossa (orbitocranial approach)

Typical Site of Service: Inpatient or outpatient hospital operating room (neurosurgical service)

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CPT 61592: Orbitocranial Approach to Middle Cranial Fossa

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Billing Code Overview

Service Type: Open cranial surgical approach to the middle cranial fossa (orbitocranial approach)

Typical Site of Service: Inpatient or outpatient hospital operating room (neurosurgical service)

Clinical & Coding Specifications

Clinical Context

A 52-year-old patient presents with progressive unilateral hearing loss, intermittent headaches, and cranial neuropathy. Imaging (MRI with contrast) identifies a 2.5–3.5 cm benign or low-grade neoplasm located in the middle cranial fossa adjacent to the temporal lobe and petrous apex, requiring direct access for maximal safe resection. The surgical team elects an orbitocranial approach through the middle cranial fossa, which includes osteotomy of the zygoma, a temporal craniotomy, and extra- or intradural elevation of the temporal lobe to expose the lesion. Preoperative workflow includes neurosurgical and neuro-otologic consultation, pre-op imaging review, anesthesia evaluation, and planning for potential vascular control and intraoperative neurophysiologic monitoring. Intraoperative steps include zygomatic osteotomy, orbitozygomatic exposure, temporal lobe elevation, lesion resection, hemostasis, possible reconstruction of the craniotomy and zygoma, and wound closure. Postoperative management includes ICU or step-down monitoring for neurologic status, pain control, imaging to evaluate extent of resection, and coordination with radiation oncology if adjuvant therapy is indicated.

Coding Specifications

Modifier	Description	When to Use
`00`	Default or unlisted modifier (not standard in CMS)	Use only if payer recognizes; otherwise do not append.
`11`	Office or outpatient visit (local payer-specific)	Rarely used with major operative CPTs; verify payer rules before use.
`22`	Increased procedural services	Use when documented work substantially greater than typical for `61592` (extensive dissection, prolonged operative time).
`23`	Unusual anesthesia	Use when procedure requires general anesthesia with unusual circumstances documented.
`26`	Professional component	Apply when billing only the surgeon's professional component separate from facility billing, if payer requires split billing.
`50`	Bilateral procedure	Not typically applicable; use only if bilateral separate procedures were performed and payer accepts.
`51`	Multiple procedures	Use when `61592` is billed with additional CPTs on same date and multiple-procedure reduction rules apply.
`52`	Reduced services	Use when procedure is intentionally partially completed and well-documented (e.g., aborted due to intraoperative findings).
`53`	Discontinued procedure	Use when procedure begun but terminated for patient safety with documentation.
`62`	Two surgeons	Use when two surgeons with distinct active roles perform the orbitocranial approach and documentation supports separate primary contributions.
`63`	Procedure performed on infants less than 4 kg	Rare for this CPT; use only if patient meets weight criteria and payer recognizes.
`66`	Surgical team (multiple surgeons)	Use for a documented surgical team approach when payer allows team coding for complex skull-base procedures.
`78`	Unplanned return to OR within global period	Use when patient returns to the operating room for a related procedure during the global period.
`80`	Assistant surgeon	Use when an assistant surgeon participates and payer allows assistant billing.
`81`	Minimum assistant surgeon	Use when assistant's participation meets minimum criteria under payer rules.

Taxonomy Code	Specialty	Notes
207P00000X	Neurological Surgery	Primary specialty performing middle cranial fossa orbitocranial approaches.
207L00000X	Otolaryngology (ENT)	Skull-base and temporal bone involvement often managed with otolaryngology-head & neck surgeons in combined cases.
208000000X	Plastic and Reconstructive Surgery	Involvement when craniofacial reconstruction or orbital/zygomatic reconstruction is required.
2080P0207X	Oral and Maxillofacial Surgery	Relevant for complex zygomatic osteotomies and facial skeletal reconstruction.
207K00000X	Neurology (consultant)	Neurology consultation for pre/postoperative neurologic assessment when indicated.

Related Diagnoses

ICD-10 Code	Description	Clinical Relevance
`C71.4`	Malignant neoplasm of temporal lobe	Primary intracranial neoplasms located in the temporal lobe often require middle cranial fossa approaches for resection.
`D32.0`	Benign neoplasm of cerebral meninges	Meningiomas of the middle cranial fossa or sphenoid wing are commonly approached via orbitocranial exposures.
`D33.3`	Benign neoplasm of cranial nerves	Schwannomas or other cranial nerve tumors in the petrous or middle fossa region may require this approach.
`G43.9`	Migraine, unspecified	Not a direct indication for `61592`; included only when temporal lobe lesions present with severe headache symptoms—use sparingly and only when appropriate.
`I62.9`	Nontraumatic intracranial hemorrhage, unspecified	Rarely, access via the middle cranial fossa may be needed for evacuation of hemorrhage adjacent to the temporal lobe.

Related CPT Codes

CPT Code	Description	Relationship to This Procedure
`61618`	Craniectomy or craniotomy for repair of vascular malformation; with resection of cavernous malformation or other deep lesion	May be used when additional craniotomy techniques or lesion-specific resection codes are required in the same operative session.
`61595`	Orbitozygomatic craniotomy approach (first stage)	Closely related approach code; may be used for variant orbitocranial exposures or in combination depending on documentation.
`61782`	Stereotactic radiosurgery, cranial lesion	Used postoperatively when adjuvant stereotactic radiosurgery is planned for residual tumor not amenable to resection.
`61620`	Craniotomy for excision of brain tumor, supratentorial	Common alternative or adjunct code when resection extends beyond the middle cranial fossa exposure described in `61592`.
`99152`	Baseline intraoperative neurophysiologic monitoring	Represents monitoring services often used during complex temporal lobe elevation and tumor resection; may be billed separately per payer rules.

CPT 61590: Infratemporal Preauricular Approach to Middle Cranial Fossa

CPT-61591-MIDDLE-CRANIAL-FOSSA-INFRATEMPORAL-PREAURICULAR-APPROACH

CPT 61591: Middle Cranial Fossa Infratemporal Preauricular Approach

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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Clinical & Coding Specifications

Clinical Context

Coding Specifications

Modifier	Description	When to Use
`00`	Default or unlisted modifier (not standard in CMS)	Use only if payer recognizes; otherwise do not append.
`11`	Office or outpatient visit (local payer-specific)	Rarely used with major operative CPTs; verify payer rules before use.
`22`	Increased procedural services	Use when documented work substantially greater than typical for `61592` (extensive dissection, prolonged operative time).
`23`	Unusual anesthesia	Use when procedure requires general anesthesia with unusual circumstances documented.
`26`	Professional component	Apply when billing only the surgeon's professional component separate from facility billing, if payer requires split billing.
`50`	Bilateral procedure	Not typically applicable; use only if bilateral separate procedures were performed and payer accepts.
`51`	Multiple procedures	Use when `61592` is billed with additional CPTs on same date and multiple-procedure reduction rules apply.
`52`	Reduced services	Use when procedure is intentionally partially completed and well-documented (e.g., aborted due to intraoperative findings).
`53`	Discontinued procedure	Use when procedure begun but terminated for patient safety with documentation.
`62`	Two surgeons	Use when two surgeons with distinct active roles perform the orbitocranial approach and documentation supports separate primary contributions.
`63`	Procedure performed on infants less than 4 kg	Rare for this CPT; use only if patient meets weight criteria and payer recognizes.
`66`	Surgical team (multiple surgeons)	Use for a documented surgical team approach when payer allows team coding for complex skull-base procedures.
`78`	Unplanned return to OR within global period	Use when patient returns to the operating room for a related procedure during the global period.
`80`	Assistant surgeon	Use when an assistant surgeon participates and payer allows assistant billing.
`81`	Minimum assistant surgeon	Use when assistant's participation meets minimum criteria under payer rules.

Taxonomy Code	Specialty	Notes
207P00000X	Neurological Surgery	Primary specialty performing middle cranial fossa orbitocranial approaches.
207L00000X	Otolaryngology (ENT)	Skull-base and temporal bone involvement often managed with otolaryngology-head & neck surgeons in combined cases.
208000000X	Plastic and Reconstructive Surgery	Involvement when craniofacial reconstruction or orbital/zygomatic reconstruction is required.
2080P0207X	Oral and Maxillofacial Surgery	Relevant for complex zygomatic osteotomies and facial skeletal reconstruction.
207K00000X	Neurology (consultant)	Neurology consultation for pre/postoperative neurologic assessment when indicated.

Related Diagnoses

ICD-10 Code	Description	Clinical Relevance
`C71.4`	Malignant neoplasm of temporal lobe	Primary intracranial neoplasms located in the temporal lobe often require middle cranial fossa approaches for resection.
`D32.0`	Benign neoplasm of cerebral meninges	Meningiomas of the middle cranial fossa or sphenoid wing are commonly approached via orbitocranial exposures.
`D33.3`	Benign neoplasm of cranial nerves	Schwannomas or other cranial nerve tumors in the petrous or middle fossa region may require this approach.
`G43.9`	Migraine, unspecified	Not a direct indication for `61592`; included only when temporal lobe lesions present with severe headache symptoms—use sparingly and only when appropriate.
`I62.9`	Nontraumatic intracranial hemorrhage, unspecified	Rarely, access via the middle cranial fossa may be needed for evacuation of hemorrhage adjacent to the temporal lobe.

Related CPT Codes

CPT Code	Description	Relationship to This Procedure
`61618`	Craniectomy or craniotomy for repair of vascular malformation; with resection of cavernous malformation or other deep lesion	May be used when additional craniotomy techniques or lesion-specific resection codes are required in the same operative session.
`61595`	Orbitozygomatic craniotomy approach (first stage)	Closely related approach code; may be used for variant orbitocranial exposures or in combination depending on documentation.
`61782`	Stereotactic radiosurgery, cranial lesion	Used postoperatively when adjuvant stereotactic radiosurgery is planned for residual tumor not amenable to resection.
`61620`	Craniotomy for excision of brain tumor, supratentorial	Common alternative or adjunct code when resection extends beyond the middle cranial fossa exposure described in `61592`.
`99152`	Baseline intraoperative neurophysiologic monitoring	Represents monitoring services often used during complex temporal lobe elevation and tumor resection; may be billed separately per payer rules.

CPT 61590: Infratemporal Preauricular Approach to Middle Cranial Fossa

CPT-61591-MIDDLE-CRANIAL-FOSSA-INFRATEMPORAL-PREAURICULAR-APPROACH

CPT 61591: Middle Cranial Fossa Infratemporal Preauricular Approach

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

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CPT 61592: Orbitocranial Approach to Middle Cranial Fossa

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Billing Code Overview

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CPT 61592: Orbitocranial Approach to Middle Cranial Fossa

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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