Summary & Overview
CPT 00873: Anesthesia for Extracorporeal Shock Wave Lithotripsy
CPT 00873 covers anesthesia provided during extracorporeal shock wave lithotripsy (ESWL), a noninvasive treatment for urinary tract and kidney stones. Nationally, this code is important because it identifies anesthesia resources and clinical complexity associated with ESWL procedures performed in hospital settings. It supports accurate billing and classification of anesthetic care when patients require sedation or general anesthesia for shock wave lithotripsy.
Key payers included in this overview are Aetna, Blue Cross Blue Shield, Cigna Health, and UnitedHealthcare. Readers will find a concise explanation of the code and its clinical context, information on common modifiers and provider taxonomies associated with anesthesia delivery, and related CPT entries for comparable anesthesia services. The publication also covers typical ICD-10 diagnoses encountered with procedures requiring ESWL and cross-references related anesthesia codes to clarify coding choices.
The content is organized to provide a quick reference for coding staff, billing teams, and policy analysts seeking clarity on service classification, payer coverage scope, and adjacent codes. Data gaps are noted where input information is incomplete. The goal is to offer a clear, national-level summary of what CPT 00873 represents and where it fits within anesthesia service coding.
CPT Code Overview
CPT 00873 describes anesthesia care provided under anesthesia for lithotripsy, extracorporeal shock wave. This code is used for anesthesia services rendered while a patient undergoes extracorporeal shock wave lithotripsy, a noninvasive procedure that uses focused shock waves to break up stones in the kidney or urinary tract. The service type is Anesthesia and the typical site of service is Inpatient Hospital (POS 21).
Clinical & Coding Specifications
Clinical Context
A patient with symptomatic knee osteoarthritis or a history of prior knee arthroplasty is scheduled for extracorporeal shock wave lithotripsy under general or monitored anesthesia in an inpatient hospital setting (POS 21). The typical workflow: preoperative assessment by the anesthesia team, verification of applicable diagnoses and prior joint status, administration of anesthesia (general, regional, or monitored anesthesia care) for the lithotripsy procedure, intraoperative hemodynamic and airway management, postoperative recovery in the hospital and handoff to nursing staff. The anesthesia encounter documents start and end times, the anesthesia technique, monitoring, any intraoperative events, and use of modifiers where applicable.
Coding Specifications
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Common modifiers:
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QS: Monitored anesthesia care service. Use when the anesthesia provided is monitored anesthesia care rather than general anesthesia for the lithotripsy procedure. -
QX: CRNA service with medical direction by a physician. Use when a Certified Registered Nurse Anesthetist delivers the anesthesia service under the medical direction of an anesthesiologist. -
Associated provider taxonomies:
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