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    v1.0.30
    OpenPayerBilling CodesTemporary National Codes (Non-Medicare)HCPCS hcpcs-s9590-home-irrigation-therapy-home-based-per-diem
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    HCPCS Level II S9590: Home Irrigation Therapy, Per Diem

    HCPCS Level II code S9590 describes a per diem home therapy service for irrigation therapy (sterile irrigation of an organ or anatomical cavity) that includes administrative services, professional pharmacy services, care coordination, and all necessary supplies and equipment; the service type is home-based irrigation therapy and the typical site of service is the patient’s home with nursing visits and drugs billed separately.

    For related coverage guidance, see recent payer policy updates: Ambulance and Medical Transport Services (Ground, Air and Water) Corporate Medical Policy, Emergency Air/Water Ambulance Services Medical Guideline, Non-Emergent Ambulance Services.

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    Table of contents

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    Clinical & Coding Specifications

    Clinical Context

    A typical patient is a 68-year-old with neurogenic bladder and recurrent urinary retention who is transitioned from hospital to a home health program for ongoing sterile bladder irrigation therapy. The patient previously underwent inpatient management with catheter irrigation after gross hematuria following transurethral resection of the prostate. At discharge, the urologist orders daily home therapy irrigation to maintain catheter patency and clear clots. A home infusion/pharmacy provider arranges supplies and coordinates nursing visits; a registered nurse performs in-home sterile irrigation, documents volumes and appearance, educates the patient/caregiver on signs of infection and catheter care, and communicates changes to the supervising physician.

    The clinical workflow includes: referral from hospital or clinic to a home care vendor, prior authorization and benefit verification with payors, pharmacy and nursing scheduling, delivery of irrigation kits and equipment, initial nursing visit for assessment and first irrigation, subsequent per-diem nursing or device-based therapy under the S9590 per diem service, periodic physician follow-up (telehealth or clinic) for therapy efficacy, and documentation of adverse events or need for escalation (e.g., return to facility for hematuria management).

    Related CPT Codes

    CPT CodeDescriptionRelationship to This Procedure
    51702Insertion of temporary indwelling urethral catheter; simple (e.g., Foley)Often performed before initiation of scheduled sterile irrigation to establish bladder drainage
    51701Insertion of temporary indwelling urethral catheter; complicatedUsed when catheter placement is technically difficult prior to home irrigation
    51720Irrigation, bladder, any solution including instillation of diagnostic agentsProcedural descriptor for bladder irrigation techniques; relates directly to the clinical task performed during S9590 per diem
    51798Special procedure, urethra and bladder, not otherwise classifiedUsed for atypical or specialized irrigation services or device-related procedures not described by other CPT codes
    99212Office or other outpatient visit for the evaluation and management of an established patient, typically 10 minutesFollow-up clinic or telehealth visits by the supervising clinician to assess home irrigation efficacy and complications

    Note: These CPT codes are commonly performed before, during, or after initiation of home irrigation therapy and support clinical workflow for S9590. If additional facility- or drug-related charges exist, they are billed separately per payer rules.

    Related Modifiers

    9 rows

    ModifierDescriptionWhen to Use
    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…
    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…
    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…
    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…
    77Modifier 77 indicates that a previously performed procedure or service was legitimately repeated by a different physician or other qualified health care professional. The AMA’s CPT definition…- Use modifier 77 when a basic procedure or service already performed is repeated by a different physician or other qualified health care professional (for example, a second provider independently…
    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…
    80CPT® Modifier 80 (Assistant Surgeon) is appended to a surgical CPT code when a physician (MD or DO) provides full, continuous assistance throughout the operative procedure. It is intended only for…- Use CPT Modifier -80 when a physician (MD or DO) serves as an assistant surgeon and provides full, continuous assistance throughout the entire operative procedure; append -80 to the surgical CPT…
    82Modifier 82 is appended to a surgical CPT code to indicate that an attending physician acted as an assistant because a qualified resident surgeon was unavailable. In teaching hospitals it documents…- When to use: Append modifier 82 in teaching-hospital settings to indicate a physician served as an assistant surgeon because a qualified resident surgeon was unavailable (includes situations where…

    Related Provider Taxonomies

    8 rows

    Taxonomy Code
    163W00000X
    282N00000X
    207RC0000X
    2080C0008X
    364SP0812X
    222Z00000X
    246ZS0410X
    2083P0901X

    Related ICD-10-CM Codes

    26 rows

    ICD-10-CM CodeDescription
    A41.9Sepsis, unspecified organism
    E86.0Dehydration
    G96.89Other specified disorders of central nervous system
    K65.9Peritonitis, unspecified
    K66.1Hemoperitoneum
    K91.2Postsurgical malabsorption, not elsewhere classified
    L03.115Cellulitis of right lower limb
    L03.116Cellulitis of left lower limb
    L89.152Pressure ulcer of sacral region, stage 2
    L89.154Pressure ulcer of sacral region, stage 4

    Showing 1–10 of 26

    Related Payer Policy Updates

    Specialty: Emergency & Medical Transportation1 / 3

    10 rows

    PolicyPayerEffective Date
    Ambulance and Medical Transport Services (Ground, Air and Water) Corporate Medical Policybcbsvermont2026-10-01
    Emergency Air/Water Ambulance Services Medical GuidelineWPS Health Insurance2026-10-01
    Non-Emergent Ambulance ServicesConnectiCare2026-09-11
    Fixed Wing Air Ambulance TransportCigna2026-08-15
    Air AmbulanceAmbetter Georgia2026-08-01
    Ambulance Services (for New Mexico Only)UnitedHealthcare2026-08-01
    Ambulance Services (for Tennessee Only)UnitedHealthcare2026-08-01
    Clinical Policy: Air AmbulanceAmbetter Nevada2026-08-01
    Air AmbulanceCentene2026-08-01
    Clinical Policy: Air AmbulanceArizona Complete Health2026-08-01

    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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