Summary & Overview

CPT 40490: Incisional Biopsy of Lip, Diagnostic Tissue Sampling

CPT code 40490 denotes an incisional biopsy of the lip performed to obtain a tissue sample from a lesion for diagnostic evaluation. As a commonly used minor surgical procedure, it is important for confirming benign versus malignant pathology and guiding subsequent treatment decisions. Nationally, accurate coding and documentation for this procedure affect claims processing, clinical records, and downstream care pathways.

Key payers included in the analysis are Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise review of clinical context for the procedure, typical sites of service, common presenting ICD-10 diagnoses associated with lip lesions, and adjacent procedural coding used in practice (for example, related excisional procedures). The report outlines typical billing considerations, common modifiers used in practice, and associated provider taxonomies that commonly submit this service.

This summary provides clinicians, billing staff, and policy analysts with a clear snapshot of what CPT code 40490 represents, why it matters for diagnostic workflows and revenue cycle operations, and where it sits relative to neighboring lip procedures. Data not available in the input is noted where applicable.

AetnaBlue Cross Blue ShieldCigna HealthUnitedHealthcareMedicare40490CPTlip biopsydiagnostic procedureminor surgeryoutpatient surgeryclaims codingpathology

Billing Code Overview

CPT code 40490 describes a biopsy of the lip performed by incising the lip and obtaining a tissue sample of a lesion for diagnostic purposes. This procedure is a minor surgical diagnostic service focused on obtaining tissue for histopathologic examination.

Service Type: Diagnostic surgical procedure (lip biopsy)

Typical Site of Service: Outpatient clinic or ambulatory surgical setting, including dermatology, oral surgery, or otolaryngology clinics

Clinical & Coding Specifications

Clinical Context

A 58-year-old patient presents to an Otolaryngology clinic with a 1.2 cm indurated, irregular lesion of the lower lip that has bled intermittently and failed to resolve after conservative care. History and exam raise concern for malignancy. The provider discusses options, obtains informed consent, and schedules a diagnostic lip biopsy performed in the office procedure room under local anesthesia. The provider incises the lip and obtains a full-thickness tissue sample of the lesion for histopathology. Specimen handling includes orientation and submission to the pathology laboratory with a requisition. The typical workflow includes pre-procedure assessment, local anesthetic infiltration, tissue sampling (incisional or punch), hemostasis, wound dressing, and post-procedure instructions. The procedure is commonly performed by Otolaryngology, Oral & Maxillofacial Surgery, or Allergy & Immunology physicians when addressing suspicious or symptomatic lip lesions. Billing uses 40490 for the biopsy; contemporaneous evaluation and management, pathology, and dressing supplies are documented separately as applicable.

Coding Specifications

Modifier	Description	When to Use
`25`	Data not available in the input.	Data not available in the input.

Taxonomy Code	Specialty	Notes
`207Y00000X`	Otolaryngology Physician	Common specialty performing lip biopsies for mucosal and cutaneous lesions.
`207K00000X`	Allergy & Immunology Physician	May evaluate oral mucosal disease and perform diagnostic biopsies in select practices.
`208000000X`	Oral & Maxillofacial Surgery Physician	Performs lip biopsies, particularly when surgical excision or complex closure may be needed.

ICD-10 Code	Description	Clinical Relevance
`K13.0`	Diseases of lips	Includes inflammatory and degenerative lip conditions that may prompt biopsy for diagnosis.
`C00.9`	Malignant neoplasm of lip, unspecified	Suspicious lesions requiring tissue diagnosis to confirm lip cancer.
`D10.0`	Benign neoplasm of lip	Lesions that may be biopsied to distinguish benign from malignant pathology.
`K13.29`	Other disturbances of oral epithelium, including tongue	Mucosal abnormalities of the lip and adjacent oral epithelium that may need histologic evaluation.
`R22.0`	Localized swelling, mass and lump, head	Descriptive presenting sign for a lip mass that may require biopsy for diagnosis.

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