lithotomy is litho--tomy - the surgical incision into an organ or duct for the purpose of removing a calculus (stone). Historically the term referred specifically to cutting into the bladder to extract a bladder stone, one of the oldest surgical procedures on record, but it is now used more broadly as a combining suffix attached to the affected site: nephrolithotomy (kidney), ureterolithotomy (ureter), pyelolithotomy (renal pelvis), and cystolithotomy (bladder). It is distinguished from lithotripsy, which fragments a stone in place (via shockwave, laser, or ultrasonic energy) without an open incision, and from litholapaxy, which crushes a stone endoscopically and evacuates the fragments through a scope rather than an incision. Modern practice has largely replaced open lithotomy with minimally invasive alternatives such as percutaneousnephrolithotomy (PCNL) and ureteroscopic laser lithotripsy, though open lithotomy is still occasionally performed for very large, complex, or anatomically inaccessible stones.
Tip
“Lithotomy position” (patient supine, hips flexed and abducted, legs in stirrups) is a positioning term derived from the historic surgical approach, not the procedure itself — it is now used for many unrelated procedures (e.g., vaginal delivery, cystoscopy) and should not be coded or documented as a synonym for the stone-removal surgery.
The term entered English in the 1610s as lithotomy (noun), from French lithotomie, from Modern Latin lithotomia, from Greek lithotomia — literally “cutting for stone.” “Cutting for the stone” is one of the oldest documented surgical operations, described by Sushruta in ancient India and referenced in the Hippocratic Oath, where physicians swore to “leave cutting for stone to those who are practitioners of that craft” (i.e., specialist lithotomists, as the procedure predated antisepsis and carried very high mortality). The root litho- connects lithotomy to the entire -lith family: lithiasis (formation of stone-like concretions), lithotripsy (crushing of stone), nephrolithiasis (kidney stone disease), and cholelithiasis (gallstone disease).
lithotripsy — fragmentation of a stone in place (shockwave, laser, or ultrasonic) without an incision; distinguished from lithotomy by the absence of surgical cutting.
Litholapaxy — endoscopic crushing of a stone followed by suction/irrigation extraction of fragments through a scope; no open incision.
lithiasis — the general pathologic process of stone/calculus formation within an organ or duct.
Urolithiasis — presence of calculi anywhere in the urinary tract; the umbrella diagnostic term coded to support lithotomy procedures.
Percutaneous nephrolithotomy or pyelostolithotomy…; complex
Modifiers:-50 (bilateral procedure, when kidney/ureteral stones are addressed bilaterally in the same session), -59 (distinct procedural service, e.g., ureterolithotomy performed at a separate site from a concurrent nephrolithotomy), -RT/-LT (laterality — required on the CPT line even though the ICD-10-CM code does not carry it), -78 (unplanned return to OR for related procedure during the postoperative period, e.g., retained fragment).
⚠️ Coding Note: Open lithotomy (50130, 50610-50630, 51050) has largely been supplanted by percutaneous (50080-50081) and endoscopic (52352) approaches; confirm the operative approach documented before defaulting to an open code, as payers frequently deny open-approach codes without clear medical necessity documentation (failed endoscopic attempt, stone burden, anatomic obstruction). Sequence the urinary calculus diagnosis (N20-N21) as the reason for the encounter, with the lithotomy CPT code reflecting the actual approach and anatomic site addressed. On inpatient profee claims, watch for “staghorn calculus” or “large renal pelvis stone” language, which should prompt confirmation of PCNL (50080/50081) rather than simple nephrolithotomy (50130), since these carry different MS-DRG and RVU weight.