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    v1.0.30
    OpenPayerBilling CodesEndoscopy Procedures on the RectumCPT cpt-45303-proctosigmoidoscopy-with-stricture-dilation
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    CPT 45303: Proctosigmoidoscopy with Stricture Dilation

    Medicare pays $1073 on average nationally for this procedure.

    CPT code 45303 describes a proctosigmoidoscopy with dilation of a stricture in the distal colon or rectum, performed using a rigid proctosigmoidoscope and balloon or other dilation device; this is an endoscopic therapeutic procedure (proctosigmoidoscopy with stricture dilation) typically performed in an ambulatory surgery center or endoscopy suite, and sometimes in an office setting depending on instrumentation and patient needs.

    For related coverage guidance, see recent payer policy updates: Percutaneous Electrical Nerve Field Stimulation for Functional Abdominal Pain Disorders, Esophagogastroduodenoscopy (EGD) Coverage Policy, Radiofrequency Therapy for Fecal Incontinence.

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    Table of contents

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    Clinical & Coding Specifications

    Clinical Context

    A 62-year-old patient with a history of chronic intermittent rectal bleeding and progressive difficulty passing stool presents to a colorectal clinic. After anoscopy and office evaluation, the provider schedules a proctosigmoidoscopy with dilation for suspected benign rectal stricture. On the day of service the patient receives conscious sedation in an ambulatory surgery center. The provider introduces a rigid proctosigmoidoscope to inspect the anus, rectum, and sigmoid colon, documents findings of a short high-grade stricture approximately 8 cm from the anal verge, and performs mechanical/balloon dilation to restore lumen patency. Post-procedure the patient is observed in recovery, given post-dilation instructions, and a short-interval follow-up is arranged to assess symptom improvement and ensure there is no perforation or bleeding.

    Typical workflow steps:

    • Referral and pre-procedure assessment including medication review and bowel preparation when indicated.

    • Procedure consent and time-out in the procedure suite or ambulatory surgery center.

    • Administration of sedation/analgesia and performance of 45303 with diagnostic inspection and dilation.

    • Post-procedure recovery, discharge instructions, and documentation of findings, dilation technique, and any complications.

    • Follow-up visit or communication to document clinical response and plan further care if needed.

    Related CPT Codes

    CPT CodeDescriptionRelationship to This Procedure
    45380Colonoscopy, flexible; diagnostic, including collection of specimen(s) by brushing or washing, when performed (separate procedure)May be performed before or instead of rigid proctosigmoidoscopy for longer segment evaluation of sigmoid colon.
    45330Sigmoidoscopy, flexible, diagnostic; with biopsy, single or multipleAlternative or complementary diagnostic procedure when tissue sampling is required.
    46020Sphincterotomy; internal anal sphincter, any methodRelated anorectal procedures that may be performed in the same operative session for sphincter pathology.
    43235Upper gastrointestinal endoscopy, flexible, transoral; diagnostic, including collection of specimen(s) by brushing or washing, when performed (separate procedure)Not directly related anatomically but commonly performed in the same endoscopy suite; listed as example of another endoscopic service.
    76536Abdominal ultrasound; real time with image documentation, limited (e.g., single organ, follow-up)Ancillary imaging sometimes used pre- or post-procedure to evaluate complications such as suspected perforation.

    Related Modifiers

    11 rows

    ModifierDescriptionWhen to Use
    25CPT modifier 25 indicates that on the same day as another procedure or service, the same physician or other qualified health care professional provided a significant, separately identifiable…- When to apply: Use modifier 25 only on an E/M code to indicate the same provider delivered a significant, separately identifiable E/M service on the same day as another procedure or service — i.e.,…
    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…
    73Modifier 73 indicates a facility-level outpatient hospital or ASC procedure that was discontinued after the patient was prepared and taken to the procedure/operating room but before any anesthesia…- When to use: Apply CPT modifier 73 on the FACILITY (outpatient hospital or ASC) claim when the patient has been fully prepared and physically taken into the procedure/operating room but 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…
    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…
    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…
    50Modifier –50 (Bilateral Procedure) is appended to a CPT code when an identical procedure is performed on paired anatomical structures during the same operative session. The AMA states to add…- Use modifier -50 when the same CPT surgical, diagnostic, or radiology procedure is performed on paired anatomical structures (both sides of the body) during the same operative/session by the same…

    Showing 1–10 of 11

    Related Provider Taxonomies

    8 rows

    Taxonomy Code
    207RC0000X
    207RH0000X
    208000000X
    225500000X
    133VN1101X
    207Y00000X
    2083A0300X
    275N00000X

    Related ICD-10-CM Codes

    26 rows

    ICD-10-CM CodeDescription
    C18.9Malignant neoplasm of colon, unspecified
    C20Malignant neoplasm of rectum
    K50.90Crohn's disease, unspecified, without complications
    K51.90Ulcerative colitis, unspecified, without complications
    K52.9Noninfective gastroenteritis and colitis, unspecified
    K55.9Vascular disorder of intestine, unspecified
    K57.11Diverticulosis of small intestine without perforation or abscess with bleeding
    K57.20Diverticulitis of large intestine with perforation and abscess without bleeding
    K57.30Diverticulosis of large intestine without perforation or abscess without bleeding
    K57.50Diverticulosis of both small and large intestine without perforation or abscess without bleeding

    Showing 1–10 of 26

    Related Payer Policy Updates

    Specialty: Gastroenterology1 / 3

    10 rows

    PolicyPayerEffective Date
    Percutaneous Electrical Nerve Field Stimulation for Functional Abdominal Pain Disordersbcbsvermont2026-12-01
    Esophagogastroduodenoscopy (EGD) Coverage Policyevicore2026-11-05
    Radiofrequency Therapy for Fecal IncontinenceCigna2026-10-15
    Magnetic Sphincter Augmentation for the Treatment of Gastroesophageal Reflux Disease (GERD)univerahealthcare2026-10-15
    High-Resolution Anoscopy (HRA)Premera Bluecross2026-10-01
    Gastroesophageal and Gastrointestinal (GI) Services and ProceduresColorado Rocky Mountain Health Plans2026-10-01
    Fecal Analysis in the Diagnosis of Intestinal Dysbiosis and Fecal Microbiota Transplant TestingOscar Health2026-10-01
    Serum Testing for Hepatic Fibrosis in the Evaluation and Monitoring of Chronic Liver DiseaseOscar Health2026-10-01
    Pancreatic Enzyme Testing for Acute PancreatitisOscar Health2026-10-01
    Helicobacter pylori TestingOscar Health2026-10-01

    Related Codes

    CPT-45300-PROCTOSIGMOIDOSCOPY-RIGID-DIAGNOSTIC

    CPT 45300: Diagnostic Proctosigmoidoscopy with Rigid Proctoscope

    CPT-45305-PROCTOSIGMOIDOSCOPY-WITH-BIOPSY

    CPT 45305: Proctosigmoidoscopy with Biopsy

    CPT-45307-PROCTOSIGMOIDOSCOPY-LOWER-GI-ENDOSCOPY

    CPT 45307: Proctosigmoidoscopy of Rectum and Sigmoid Colon

    CPT-45308-PROCTOSIGMOIDOSCOPIC-LESION-REMOVAL

    CPT 45308: Proctosigmoidoscopy with Removal of Single Lesion

    CPT-45309-PROCTOSIGMOIDOSCOPY-SNARE-EXCISION-LESION

    CPT 45309: Proctosigmoidoscopy with Snare Polypectomy

    CPT-45315-PROCTOSIGMOIDOSCOPIC-POLYPECTOMY-MULTIPLE-LESIONS

    CPT 45315: Proctosigmoidoscopy with Multiple Lesion Removal

    CPT-45317-PROCTOSIGMOIDOSCOPY-WITH-HEMOSTASIS

    CPT 45317: Therapeutic Proctosigmoidoscopy for Hemorrhage Control

    CPT-45320-PROCTOSIGMOIDOSCOPIC-LESION-ABLATION

    CPT 45320: Proctosigmoidoscopic Ablation of Lesion

    CPT-45321-PROCTOSIGMOIDOSCOPIC-DECOMPRESSION-SIGMOID-VOLVULUS

    CPT 45321: Proctosigmoidoscopic Decompression of Volvulus

    CPT-45327-PROCTOSIGMOIDOSCOPIC-STENT-PLACEMENT-FOR-RECTAL-SIGMOID-STRICTURE

    CPT 45327: Proctosigmoidoscopy with Stent Placement

    Showing 1–10 of 39

    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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