CPT 43238: Endoscopic Ultrasound with FNA/Biopsy of Upper GI

CPT code 43238 denotes endoscopic ultrasound (EUS) with ultrasound-guided intramural or transmural fine needle aspiration or biopsy of the esophagus, stomach, or duodenum. This advanced diagnostic and sampling technique is important nationally for staging gastrointestinal malignancies, diagnosing subepithelial lesions, and obtaining tissue from peri-gastric or peri-esophageal structures that are difficult to access by other methods. It represents a higher-complexity, image-guided endoscopic service frequently performed in hospital outpatient departments and ambulatory surgical centers.

Key payers included in the discussion are Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise overview of clinical context and service setting, common payer coverage patterns, and typical billing considerations tied to EUS-guided fine needle aspiration/biopsy. The publication outlines expected clinical uses, where the procedure is typically performed, and the types of procedural documentation and coding elements that drive reimbursement and quality reporting. Data not available in the input is noted where relevant. The focus is national in scope and intended for clinicians, billing professionals, and policy analysts engaged with advanced endoscopic procedures.

Billing Code Overview

CPT code 43238 describes an endoscopic ultrasound (EUS) procedure in which a flexible endoscope is passed through the mouth into the esophagus, stomach, and duodenum to perform an ultrasound-guided intramural or transmural fine needle aspiration or biopsy. This procedure combines endoscopy and ultrasound imaging to obtain tissue samples from lesions adjacent to or within the gastrointestinal wall.

Service type: Endoscopic ultrasound with fine needle aspiration/biopsy
Typical site of service: Hospital outpatient department or ambulatory surgical center, performed via the oral route under procedural sedation

Clinical Context

A 62-year-old male with progressive dysphagia and unintentional weight loss undergoes evaluation with upper endoscopy. The gastroenterologist performs an esophagogastroduodenoscopy with endoscopic ultrasound (EUS). During EUS, a 2.5 cm hypoechoic mass is identified arising from the wall of the distal esophagus with perigastric lymph nodes visualized. The provider advances a flexible linear echoendoscope through the mouth into the esophagus, stomach, and duodenum to perform ultrasound-guided fine needle aspiration (FNA) of the intramural esophageal lesion and sampling of a perigastric lymph node.

The clinical workflow includes pre-procedure evaluation (history, informed consent, antithrombotic management), procedural sedation or anesthesia, endoscopic visualization, EUS assessment, FNA or core biopsy with immediate on-site cytology when available, specimen handling and labeling, post-anesthesia recovery, and documentation of findings, specimens, and any complications. Typical indications include evaluation of subepithelial masses, staging of known or suspected gastrointestinal malignancy, and diagnosis of mediastinal or perigastric lymphadenopathy for treatment planning.

Coding Specifications

Modifier	Description	When to Use
`26`	Professional component	Use when only the physician professional component is reported separate from technical services (rare for endoscopic procedures when facility bills technical component).

Taxonomy Code	Specialty	Notes
208000000X	Gastroenterology	Most common specialty performing EUS with FNA/B.
207P00000X	General Surgery	Some foregut surgeons perform endoscopic ultrasound and therapeutic endoscopy.
208800000X	Internal Medicine (Hospitalist/Interventional Gastroenterology not otherwise specified)	Physicians with interventional endoscopy training may bill under internal medicine taxonomy.
282N00000X	Anesthesiology	Provides monitored anesthesia care or general anesthesia for complex endoscopic procedures.
2085S0123X	Pulmonology	Performs EUS of mediastinum in some practices when airway-oriented sampling is needed.

Related Diagnoses

ICD-10 Code	Description	Clinical Relevance
`C15.9`	Malignant neoplasm of esophagus, unspecified	Primary indication when a suspicious esophageal mass requires tissue diagnosis and staging via EUS-FNA.
`C16.9`	Malignant neoplasm of stomach, unspecified	Used when gastric wall lesions or masses require EUS-guided sampling for diagnosis or staging.
`K22.8`	Other specified diseases of esophagus	Includes subepithelial lesions (e.g., leiomyoma, GIST) where EUS-FNA helps characterize the lesion.
`R13.10`	Dysphagia, unspecified	Symptom prompting diagnostic endoscopy with EUS and possible FNA when imaging suggests an intramural lesion.
`C77.0`	Secondary and unspecified malignant neoplasm of lymph nodes of head, face and neck	Mediastinal or perigastric lymph node sampling via EUS-FNA for staging or diagnosis of nodal disease.

Related CPT Codes

CPT Code	Description	Relationship to This Procedure
`43235`	Esophagogastroduodenoscopy, flexible, transoral; with biopsy, single or multiple	Diagnostic EGD often performed immediately before or instead of EUS when mucosal biopsies are indicated; may be billed separately if both procedures are completed and distinct.
`43239`	Esophagogastroduodenoscopy, flexible, transoral; with ultrasound examination limited to esophagus, stomach, or duodenum, with FNA/biopsy, more extensive than single lesion	Related EUS-guided sampling procedure codes for varying complexity; used when documentation supports a different extent or additional sampling than `43238`.
`43259`	Esophagogastroduodenoscopy, flexible, transoral; with dilation of esophagus, therapeutic	May be performed before or after EUS if a stenosis requires dilation as part of patient management; indicates combined therapeutic interventions.
`76942`	Ultrasonic guidance for needle placement (e.g., biopsy, aspiration), imaging supervision and interpretation	Sometimes reported when separate ultrasound guidance for needle placement is performed by a different practitioner or billed separately; typically bundled with EUS-FNA when performed by same physician.
`88305`	Level IV surgical pathology, gross and microscopic examination	Common pathology billing code for cytology/histology from FNA/core biopsy specimens obtained during `43238`; linked to laboratory services rather than the endoscopic procedure.

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Summary & Overview