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    v1.0.30
    OpenPayerBilling CodesRepair Procedures on the RectumCPT cpt-45500-anorectal-stenosis-release-with-flap-repair
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    CPT 45500: Surgical Release of Anorectal Stenosis with Flap Repair

    Medicare pays $579 on average nationally for this procedure.

    CPT code 45500 describes surgical release of anorectal stenosis by incising scar tissue and reconstructing the defect using local tissue flaps; this is a procedural surgical service typically performed in an operating room or ambulatory surgical center under regional or general anesthesia for relief of symptomatic anal or rectal narrowing.

    For related coverage guidance, see recent payer policy updates: Dental Anesthesia Services, Anesthesia Services for Interventional Pain Management Procedures in an Adult, General Anesthesia and Conscious Sedation Services.

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    Table of contents

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    Clinical & Coding Specifications

    Clinical Context

    A typical patient is a 45–65-year-old adult with symptomatic anorectal stenosis presenting with progressive difficulty with defecation, painful or incomplete bowel movements, recurrent fecal impaction, perianal pain, and possible bleeding. Common antecedents include prior hemorrhoidectomy, fissure surgery, radiation therapy to the pelvis, Crohn disease with perianal surgery, or repeat anorectal procedures leading to cicatricial narrowing. The clinical workflow begins with history and focused anorectal examination, including anoscopy and digital rectal exam, and may include endoanal ultrasound or flexible sigmoidoscopy to assess stricture length and any concurrent pathology. Nonoperative measures (bowel regimen, dilators) are often attempted first. When conservative therapy fails or the stenosis is severe, the surgeon schedules operative release under appropriate anesthesia in an ambulatory surgery center or hospital operating room. In the procedure described by 45500, the surgeon incises scar tissue to release the stenosis and reconstructs the defect using adjacent tissue flaps to widen the anal canal and restore function. Postoperative care includes wound care, stool softeners, pain control, and follow-up to assess healing and function. Typical sites of service are the hospital outpatient operating room or ambulatory surgery center; inpatient admission is uncommon unless comorbidities or complications require it.

    Related CPT Codes

    CPT CodeDescriptionRelationship to This Procedure
    45110Excision, lesion of perianal skin and subcutaneous tissuePerformed for local skin lesions or scar excision adjacent to a stenosis as part of exposure or debridement.
    45330Sigmoidoscopy, flexible; diagnostic, including collection of specimen by brushing or washing, when performed (separate procedure)Used preoperatively to evaluate distal rectal mucosa and exclude other pathology prior to definitive stenosis repair.
    44140Colectomy, partial; with anastomosisRarely performed concurrently if extensive disease or stricture extends higher requiring segmental resection.
    46255Fistulectomy, complex, or fistulotomy with repair (note: example of perianal reconstruction)Related reconstructive techniques for complex perianal disease that may coexist and require combined operative planning.
    99499Unlisted evaluation and management serviceMay be used for nonstandard preoperative or postoperative management not captured by established codes.

    Related Modifiers

    7 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…
    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…
    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…
    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…
    79Modifier 79 indicates a surgical procedure performed during the postoperative global period of a prior surgery that is unrelated to the original procedure. Per AMA/CPT and CMS guidance, it is…- Use modifier 79 when the same physician (or same‑specialty physician in the same group) performs a surgical procedure during the postoperative global period of a prior surgery and the new procedure…

    Related Provider Taxonomies

    8 rows

    Taxonomy Code
    207L00000X
    208000000X
    2086S0122X
    207K00000X
    111NN0400X
    207QS0010X
    364SP0813X
    211D00000X

    Related ICD-10-CM Codes

    23 rows

    ICD-10-CM CodeDescription
    K57.10Diverticulosis of small intestine without perforation or abscess without bleeding
    K57.12Diverticulitis of small intestine without perforation or abscess without bleeding
    K57.20Diverticulitis of large intestine with perforation and abscess without bleeding
    K57.30Diverticulosis of large intestine without perforation or abscess without bleeding
    K57.32Diverticulitis of large intestine without perforation or abscess without bleeding
    K57.92Diverticulitis of intestine, part unspecified, without perforation or abscess without bleeding
    K60.0Acute anal fissure
    K60.1Chronic anal fissure
    K60.2Anal fissure, unspecified
    K62.0Anal polyp

    Showing 1–10 of 23

    Related Payer Policy Updates

    Specialty: Anesthesiology1 / 3

    10 rows

    PolicyPayerEffective Date
    Dental Anesthesia ServicesProvidence Health Plan2026-10-01
    Anesthesia Services for Interventional Pain Management Procedures in an AdultCigna2026-09-15
    General Anesthesia and Conscious Sedation ServicesUnitedHealthcare2026-09-01
    Intravenous Anesthetics for the Treatment of Chronic Pain and Psychiatric or Substance Use DisordersPremera Bluecross2026-07-01
    Intravenous Anesthetics for the Treatment of Chronic Pain and Psychiatric or Substance Use DisordersPremera Bluecross2026-07-01
    Intravenous Anesthetics for the Treatment of Chronic Pain and Psychiatric or Substance Use DisordersPremera Bluecross2026-07-01
    Intravenous Anesthetics for the Treatment of Chronic Pain and Psychiatric or Substance Use DisordersPremera Bluecross2026-07-01
    Elective Inpatient Services (for Idaho Only)UnitedHealthcare2026-06-01
    Sites of Servicepriority health2026-06-01
    Coverage for Ambulatory Surgery Unit (ASU)/Outpatient Facility and Anesthesia for Dental Servicesuniverahealthcare2026-05-21

    Related Codes

    CPT-45505-RECTAL-MUCOSA-EXCISION-AND-FLAP-REPAIR

    CPT 45505: Excision of Prolapsed Rectal Mucosa with Flap Repair

    CPT-45520-RECTAL-SCLEROTHERAPY-FOR-PROLAPSED-MUCOSA

    CPT 45520: Sclerotherapy for Prolapsed Rectal Mucosa

    CPT-45540-ABDOMINAL-RECTOPEXY-RECTAL-PROLAPSE-MESH-SUTURE

    CPT 45540: Abdominal Repair of Rectal Prolapse with Suture and Mesh

    CPT-45541-PERINEAL-RECTAL-PROLAPSE-REPAIR-MESH-SUTURES

    CPT 45541: Perineal Repair of Rectal Prolapse with Sutures and Mesh

    CPT-45550-RECTOPEXY-WITH-SIGMOID-RESECTION

    CPT 45550: Abdominal Repair of Rectal Prolapse with Sigmoid Resection

    CPT-45560-RECTOCELE-REPAIR-VAGINAL

    CPT 45560: Rectocele Repair, Vaginal

    CPT-45562-RECTAL-REPAIR-PRESACRAL-DRAINAGE

    CPT 45562: Exploration and Repair of Rectum with Presacral Drainage

    CPT-45563-RECTAL-INJURY-REPAIR-SIGMOID-COLOSTOMY

    CPT 45563: Exploratory Abdominal Surgery, Repair Rectal Injury and Sigmoid Colostomy

    CPT-45800-RECTOVESICAL-FISTULA-REPAIR-OPEN-ABDOMINAL

    CPT 45800: Repair of Rectovesical Fistula, Abdominal Approach

    CPT-45805-RECTOVESICAL-FISTULA-REPAIR-WITH-SIGMOID-COLOSTOMY

    CPT 45805: Rectovesical Fistula Repair with Sigmoid Colostomy

    Showing 1–10 of 12

    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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