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    v1.0.28
    OpenPayerBilling CodesTemporary National Codes (Non-Medicare)HCPCS hcpcs-s2401-fetal-urinary-tract-obstruction-repair-in-utero
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    HCPCS Level II S2401: Repair of Fetal Urinary Tract Obstruction, In Utero

    HCPCS Level II code S2401 denotes a procedure for repair of a urinary tract obstruction in the fetus performed in utero; this is an intrauterine fetal surgical procedure typically categorized as a fetal intervention or prenatal surgery and is performed in an operating room or specialized fetal surgery suite within a hospital setting, representing a highly specialized surgical service involving maternal-fetal medicine and pediatric urology teams.

    For related coverage guidance, see recent payer policy updates: Fixed Wing Air Ambulance Transport, Air Ambulance, Ambulance Services (for Tennessee Only).

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    Table of contents

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    Explore openpayer tools

    • Billing CodesCPT, HCPCS, DRG & more
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    Clinical & Coding Specifications

    Clinical Context

    A pregnant patient at 20–28 weeks gestation is referred to a fetal therapy center after routine obstetric ultrasound detects fetal hydroureteronephrosis and oligohydramnios suggestive of lower urinary tract obstruction (e.g., posterior urethral valves or urethral atresia). Maternal-fetal medicine specialists, pediatric urologists, anesthesiology, neonatology, and interventional radiology participate in multidisciplinary evaluation. Diagnostic workup includes targeted fetal ultrasound, fetal echocardiography, and maternal infectious and genetic testing. If fetal renal function is threatened and the obstruction is amenable to in utero intervention, fetal cystoscopy with endoscopic valve ablation or placement of a vesicoamniotic shunt is scheduled. The procedure is performed in an operating room or specialized fetal intervention suite under maternal regional or general anesthesia with continuous fetal monitoring. Postprocedure care includes short maternal hospitalization for monitoring, serial ultrasounds to assess shunt position or decompression, and coordinated delivery planning with neonatal intensive care. The billing entry uses S2401 to indicate repair of a urinary tract obstruction performed in utero.

    Related CPT Codes

    CPT CodeDescriptionRelationship to This Procedure
    59050Fetal monitoring during labor, nonstress test (NST)Used pre- and postprocedure for fetal assessment when continuous or intermittent monitoring is required.
    59025External cephalic version (not directly related but listed as fetal procedure category)Not typically used for urinary tract repair; included as a related fetal procedure code context in perinatal services.
    59400Routine obstetric care including antepartum care, delivery, and postpartum careUsed by the obstetric provider for global maternity services surrounding the fetal intervention when applicable.
    51715Cystourethroscopy, with insertion of indwelling bladder catheter (separate procedure)Provides context for endoscopic access techniques analogous to fetal cystoscopy; pediatric urologist technique parallels may be billed postnatally.
    76942Ultrasonic guidance for needle placement (e.g., amniocentesis, biopsy)Used intraoperatively or preprocedure for imaging guidance during shunt placement or instrument insertion.

    Related Modifiers

    12 rows

    ModifierDescriptionWhen to Use
    22Modifier –22 (Increased Procedural Services) is used when a reported procedure is substantially more extensive than normally required. The CPT Manual and CMS state it may be appended only when the…- When to use: Append modifier -22 to a procedural CPT code when the service performed is substantially more extensive than the usual service described by that code — i.e., the procedure required…
    23Modifier -23 (Unusual Anesthesia) is used on anesthesia service CPT codes when a procedure that normally requires no anesthesia or only local anesthesia must be performed under general anesthesia…- Use modifier -23 only on anesthesia CPT codes (00100–01999) when a procedure that normally requires no anesthesia or only local anesthesia must be performed under general anesthesia because of…
    26Modifier 26 (Professional Component) identifies and bills only the professional portion of a split service — the physician’s interpretation, report, and medical judgment — when the technical…- Use CPT Modifier -26 when you are billing only the professional component (PC) of a split‑bill eligible service—i.e., you performed the physician interpretation, medical judgment and prepared a…
    59Modifier 59 indicates a distinct procedural service when two procedures that are not normally billed together are clinically and procedurally separate. The CPT definition (as reiterated by CMS)…- Use modifier -59 to report a distinct procedural service when documentation supports that the procedure reported is not normally billed together with another service on the same day because of a…
    62Modifier 62 indicates that two surgeons function as co‑surgeons, each performing distinct parts of the same primary surgical procedure. It is appended to the primary procedure code (and any…- Use modifier -62 when two surgeons act as co‑surgeons (both primary surgeons) on a single definitive primary procedure, each performing distinct parts of the same surgical procedure (append -62 to…
    52Modifier ‑52 (Reduced Services) indicates that a service or procedure was partially reduced or omitted at the provider’s discretion, allowing reporting of the basic procedure number with a qualifier…- Use modifier -52 when a physician or qualified health professional electively reduces or omits part of a procedure or service (for example, performing fewer required views or omitting a portion of…
    53Modifier 53 (Discontinued Procedure) signals that a surgical or diagnostic service was begun by the physician but terminated because of extenuating circumstances that threatened the patient’s…- Use modifier -53 when a physician/qualified healthcare professional has started a surgical or diagnostic procedure (e.g., anesthesia administered, incision or scope insertion) and then discontinues…
    66Modifier 66 (Surgical Team) is used when three or more surgeons act as primary surgeons on a single, highly complex procedure. The AMA defines it for use when a surgical team — often composed of…- Use modifier 66 when three or more surgeons act as primary surgeons working collaboratively as a surgical team on a single, highly complex or difficult procedure (for example organ…
    76Modifier -76, Repeat Procedure or Service by Same Physician or Other Qualified Health Care Professional, is appended when the same provider performs an identical, medically necessary procedure or…- Use modifier -76 when the same physician or other qualified health care professional performs an identical procedure or service a second (or subsequent) time on the same date of service and the…
    78CPT modifier -78 indicates an unplanned, related return to the operating or procedure room by the same provider during the global postoperative period. It is appended when treatment for a…- Use modifier -78 when an unplanned, related complication during the original procedure’s global postoperative period requires the patient to return to a formal operating or procedure room and the…

    Showing 1–10 of 12

    Related Provider Taxonomies

    8 rows

    Taxonomy CodeSpecialtyNotes
    207V00000XObstetrics & Gynecology PhysicianAn obstetrician/gynecologist possesses special knowledge, skills and professional capability in the medical and surgical care of the female reproducti…
    2080P0207XPediatric Hematology & Oncology PhysicianA pediatrician trained in the combination of pediatrics, hematology and oncology to recognize and manage pediatric blood disorders and cancerous disea…
    207K00000XAllergy & Immunology PhysicianAn allergist-immunologist is trained in evaluation, physical and laboratory diagnosis, and management of disorders involving the immune system. Select…
    207L00000XAnesthesiology PhysicianAn anesthesiologist is trained to provide pain relief and maintenance, or restoration, of a stable condition during and immediately following an opera…
    208000000XPediatrics PhysicianA pediatrician is concerned with the physical, emotional and social health of children from birth to young adulthood. Care encompasses a broad spectru…
    332000000XMilitary/U.S. Coast Guard PharmacyA Department of Defense (DoD) or U.S. Coast Guard entity whose primary function is to store, prepare and dispense pharmaceuticals and other associated…
    2278P3800XPalliative/Hospice Certified Respiratory TherapistA coordinated plan of care to help dying patients and their families handle the burden of terminal care. Effective secretion management and relief of…
    3416A0800XAir AmbulanceTransportation Services · Ambulance

    Related ICD-10-CM Codes

    22 rows

    ICD-10-CM CodeDescription
    N11.9Chronic tubulo-interstitial nephritis, unspecified
    N12Tubulo-interstitial nephritis, not specified as acute or chronic
    N13.4Hydroureter
    N13.6Pyonephrosis
    N13.8Other obstructive and reflux uropathy
    N13.9Obstructive and reflux uropathy, unspecified
    P07.30Preterm newborn, unspecified weeks of gestation
    P76.0Meconium plug syndrome
    Q60.0Renal agenesis, unilateral
    Q60.1Renal agenesis, bilateral

    Showing 1–10 of 22

    Related Payer Policy Updates

    Specialty: Emergency & Medical Transportation1 / 3

    9 rows

    PolicyPayerEffective Date
    Fixed Wing Air Ambulance TransportCigna2026-08-15
    Air AmbulanceAmbetter Georgia2026-08-01
    Ambulance Services (for Tennessee Only)UnitedHealthcare2026-08-01
    Ambulance Services (for New Mexico Only)UnitedHealthcare2026-08-01
    Clinical Policy: Air AmbulanceArizona Complete Health2026-08-01
    Clinical Policy: Air AmbulanceCentene2026-08-01
    Air AmbulanceCentene2026-08-01
    Clinical Policy: Air AmbulanceAmbetter Nevada2026-08-01
    Ambulance TransportProvidence Health Plan2026-07-01

    Related Codes

    HCPCS-LEVEL-II-S2152-SOLID-ORGAN-TRANSPLANTATION-GLOBAL-CARE

    HCPCS Level II S2152: Solid Organ Procurement and Transplantation

    HCPCS-LEVEL-II-S2266-INDUCED-ABORTION-29-TO-31-WEEKS

    HCPCS Level II S2266: Induced Abortion, 29 to 31 Weeks

    HCPCS-LEVEL-II-S3630-EOSINOPHIL-COUNT-BLOOD-DIRECT

    HCPCS Level II S3630: Eosinophil Count, Blood, Direct

    HCPCS-LEVEL-II-S4017-INCOMPLETE-ART-CYCLE-CANCELLED-PRIOR-TO-STIMULATION

    HCPCS Level II S4017: Incomplete Cycle — Cancelled Prior to Stimulation

    HCPCS-LEVEL-II-S8055-ULTRASOUND-GUIDANCE-MULTIFETAL-REDUCTION-TC

    HCPCS Level II S8055: Ultrasound Guidance for Multifetal Pregnancy Reduction

    HCPCS-LEVEL-II-S8940-EQUESTRIAN-HIPPOTHERAPY-PER-SESSION

    HCPCS Level II S8940: Equestrian/Hippotherapy, Per Session

    HCPCS-LEVEL-II-S9024-PARANASAL-SINUS-ULTRASOUND

    HCPCS Level II S9024: Paranasal Sinus Ultrasound

    HCPCS-LEVEL-II-S9366-HOME-TPN-1-2L-PER-DAY-HOME-INFUSION

    HCPCS Level II S9366: Home Infusion TPN, 1–2 L/day

    HCPCS-LEVEL-II-S9446-GROUP-PATIENT-EDUCATION-NON-PHYSICIAN

    HCPCS S9446: Patient Education, Non-Physician Provider, Group, Per Session

    HCPCS-LEVEL-II-S9451-EXERCISE-CLASS-NON-PHYSICIAN-SESSION

    HCPCS S9451: Exercise Classes, Non-Physician Provider, Per Session

    Showing 1–10 of 532

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    Frequently Asked Questions

    References

    1. 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. 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. 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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