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CurrentCurativePolicy CHP-OP-2026-025

Colonoscopy Coverage and Medical Necessity

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Coverage criteria for screening, follow-on, surveillance, diagnostic, therapeutic, hereditary-syndrome, inflammatory bowel disease, and stoma colonoscopy in adults and members with qualifying risk factors or indications.

Policy Summary

PayerCurative

PolicyColonoscopy Coverage and Medical Necessity

Policy CodePolicy CHP-OP-2026-025

Change TypeNo material change

Effective DateN/A

Next Review DateN/A

Key ActionDocument the indication category and the relevant prior colonoscopy, pathology, symptoms, laboratory, imaging, or surveillance-interval details.

SourceLink

POLICY UPDATE CHANGES

No material clinical or coverage changes in this revision.

45-75Average-risk screening age

10 yearsRoutine screening interval

6 monthsPiecemeal resection repeat interval

85Routine screening upper age limit

12 monthsRepeat after inadequate preparation

Medical Necessity and Coverage Criteria

Average-risk screening colonoscopy

Covered as a preventive service when ALL of the following are met.

Eligible age
- Age 45 through 75 years.
- Age 76 through 85 years with an individualized decision based on overall health, prior screening history, and preference.
Interval and service conditions: No qualifying colonoscopy in the prior 10 years; no negative screening test within its recommended interval; and associated polypectomy, biopsy, pathology, medically appropriate anesthesia, and pre-procedure consultation are part of the preventive service.10 years

Policy Summary

PayerCurative

PolicyColonoscopy Coverage and Medical Necessity

Policy CodePolicy CHP-OP-2026-025

Change TypeNo material change

Effective DateN/A

Next Review DateN/A

Key ActionDocument the indication category and the relevant prior colonoscopy, pathology, symptoms, laboratory, imaging, or surveillance-interval details.

SourceLink

On This Page

Increased-risk screening and family history

Medically necessary when ANY of the following increased-risk conditions is met.

Increased-risk screening

Family history or radiation risk: One first-degree relative with colorectal cancer or an advanced adenoma before age 60; two or more first-degree relatives with colorectal cancer at any age; one first-degree relative with an advanced serrated lesion; one first-degree relative with colorectal cancer or advanced adenoma at age 60 or older; or survivor of childhood or young-adult cancer treated with abdominal or pelvic radiation.Usually age 40 or 10 years before the youngest diagnosis for higher-risk family history; average-risk intervals for a relative diagnosed at age 60 or older; radiation plan per treating oncologist

Post-polypectomy and post-resection surveillance

Medically necessary when the applicable surveillance interval is due under ANY of the following conditions.

Polyp and examination findings: Normal colonoscopy or 20 or fewer hyperplastic polyps under 10 mm: 10 years; 1-2 tubular adenomas under 10 mm: 7-10 years; 3-4 tubular adenomas under 10 mm or specified sessile serrated lesion findings: 3-10 years; 5-10 adenomas or sessile serrated lesions, advanced adenoma features, or traditional serrated adenoma: 3 years; more than 10 adenomas: 1 year; piecemeal resection of an adenoma or sessile serrated lesion at least 20 mm: 6 months, then 1 year, then 3 years.6 months to 10 years depending on findings
More than 10 adenomas warrants consideration of genetic counseling and testing.
Colorectal cancer resection: After curative colorectal cancer resection, perform clearing colonoscopy preoperatively or within 3-6 months after surgery if a complete preoperative examination was not possible; then at 1 year, 3 years, 5 years, and every 5 years while surveillance remains beneficial.3-6 months if needed, then 1 year, 3 years, 5 years, and every 5 years
Inadequate preparation: Repeat colonoscopy within 12 months, or as soon as possible when the prior examination followed an abnormal non-colonoscopic screening test or alarm symptoms are present.Within 12 months or sooner when clinically indicated

Hereditary syndromes and inflammatory bowel disease

Medically necessary when ANY of the following hereditary-syndrome or inflammatory bowel disease conditions is met.

Hereditary syndrome: Lynch syndrome; familial adenomatous polyposis or attenuated FAP; MUTYH-associated or other adenomatous polyposis; Peutz-Jeghers, juvenile, or other hamartomatous polyposis; or serrated polyposis syndrome meeting WHO criteria.Lynch: every 1-2 years beginning age 20-25 or 2-5 years before earliest family diagnosis; serrated polyposis: every 1-3 years; other syndromes per syndrome-specific schedule
Inflammatory bowel disease surveillance or reassessment: Ulcerative colitis or Crohn's colitis involving at least one-third of the colon requires dysplasia surveillance beginning 8-10 years after diagnosis or symptom onset and then every 1-5 years based on risk; primary sclerosing cholangitis requires surveillance beginning at diagnosis and annually. Reassessment is appropriate about 3-6 months after starting or changing ulcerative colitis therapy, 6-9 months after starting or changing Crohn's disease therapy, or when symptoms or biomarkers suggest active disease and the result will change treatment.Surveillance: 8-10 years after diagnosis or onset; reassessment: 3-6 months for ulcerative colitis or 6-9 months for Crohn's disease
Annual surveillance applies to high-risk patients, including prior dysplasia or cancer, and to primary sclerosing cholangitis.

Diagnostic and therapeutic colonoscopy

Medically necessary when ANY of the following diagnostic or therapeutic indications is met.

Diagnostic or therapeutic indication: The member has rectal bleeding, hematochezia, or melena after a negative upper evaluation; iron-deficiency anemia or a non-screening positive fecal occult blood test; a qualifying change in bowel habits, unexplained weight loss, or chronic diarrhea requiring tissue diagnosis; abnormal colon or rectal imaging; a therapeutic indication; suspected inflammatory bowel disease, ischemic colitis, or infection requiring tissue diagnosis; or persistent lower gastrointestinal symptoms with a documented diagnostic concern and management impact.Change in bowel habits lasting more than 4 weeks when otherwise qualifying

The record must state the specific diagnostic concern and how the result will affect management for other persistent symptoms.

Continuation and repeat service

Repeat colonoscopy is medically necessary when ANY of the following is met.

Repeat service or re-authorization: The applicable screening or surveillance interval has elapsed; the prior examination was incomplete because the cecum was not reached or bowel preparation was inadequate; or a new symptom or finding meets diagnostic criteria.Per applicable interval; within 12 months for inadequate preparation unless sooner indicated

Follow-up colonoscopy

Follow-up after an abnormal screening test

Follow-on colonoscopy: A colonoscopy performed after a positive non-invasive stool-based screening test or direct-visualization colorectal cancer screening test is part of the screening process and is covered for individuals within the applicable USPSTF recommendation.Positive non-invasive or direct-visualization screening test

Coverage applies to the follow-up colonoscopy after an abnormal screening result.

Polypectomy and anesthesia

Screening procedure components

Integral services: Polyp removal during a screening colonoscopy is integral to the screening service, and anesthesia judged medically appropriate by the attending provider remains associated with the preventive colonoscopy.Medically appropriate anesthesia as determined by attending provider

Removal of polyps does not convert the screening colonoscopy to a diagnostic service.

Post-polypectomy and high-risk surveillance

Surveillance interval criteria

Risk-based surveillance: Surveillance intervals should follow the patient's prior findings and risk population. Low-risk findings may support longer intervals, such as 7 to 10 years for 1 to 2 small tubular adenomas, while advanced or multiple lesions require shorter intervals. Earlier surveillance without a new indication is routed to physician review.Example: 7-10 years for 1-2 small tubular adenomas

Higher-risk populations may have distinct start ages and intervals.

Coding and Interval Reference

Colonoscopy through stomaCPT

44388	Colonoscopy through stoma
44389	Colonoscopy through stoma
44390	Colonoscopy through stoma
44391	Colonoscopy through stoma
44392	Colonoscopy through stoma
44394	Colonoscopy through stoma
44401	Colonoscopy through stoma
44402	Colonoscopy through stoma
44404	Colonoscopy through stoma
44405	Colonoscopy through stoma

1–10 of 13

1/2

Diagnostic colonoscopy and related proceduresCPT

45378	Colonoscopy, diagnostic and with biopsy, foreign body removal, control of bleeding, lesion removal
45379	Colonoscopy, diagnostic and with biopsy, foreign body removal, control of bleeding, lesion removal
45380	Colonoscopy, diagnostic and with biopsy, foreign body removal, control of bleeding, lesion removal
45381	Colonoscopy, diagnostic and with biopsy, foreign body removal, control of bleeding, lesion removal
45382	Colonoscopy, diagnostic and with biopsy, foreign body removal, control of bleeding, lesion removal
45384	Colonoscopy, diagnostic and with biopsy, foreign body removal, control of bleeding, lesion removal

Colonoscopy with advanced interventionCPT

45385	Colonoscopy with snare removal, dilation, stent, ablation, ultrasound, and endoscopic mucosal resection
45386	Colonoscopy with snare removal, dilation, stent, ablation, ultrasound, and endoscopic mucosal resection
45388	Colonoscopy with snare removal, dilation, stent, ablation, ultrasound, and endoscopic mucosal resection
45389	Colonoscopy with snare removal, dilation, stent, ablation, ultrasound, and endoscopic mucosal resection
45390	Colonoscopy with snare removal, dilation, stent, ablation, ultrasound, and endoscopic mucosal resection
45391	Colonoscopy with snare removal, dilation, stent, ablation, ultrasound, and endoscopic mucosal resection
45392	Colonoscopy with snare removal, dilation, stent, ablation, ultrasound, and endoscopic mucosal resection
45393	Colonoscopy with snare removal, dilation, stent, ablation, ultrasound, and endoscopic mucosal resection
45398	Colonoscopy with snare removal, dilation, stent, ablation, ultrasound, and endoscopic mucosal resection

HCPCS screening colonoscopy codesHCPCS

G0105	HCPCS screening colonoscopy code
G0121	HCPCS screening colonoscopy code

Screening claim modifiersModifier

33	Modifier 33; screening preventive-service claim convention
PT	Modifier PT; Medicare billing convention also accepted and not a coverage condition

Average-risk screening age

Age 45 through 75Screening is covered for average-risk adults ages 45 through 75.

Age 76 through 85Screening requires an individualized decision documented with consideration of overall health, prior screening history, and preference.

Over age 85Routine screening is not medically necessary for members older than age 85.

Average-risk screening interval

Prior colonoscopyNo colonoscopy occurred in the prior 10 years.

Preparation qualityThe prior colonoscopy had adequate bowel preparation.

Prior findingsThe prior colonoscopy had no findings requiring surveillance.

Piecemeal resection follow-up

Lesion sizePiecemeal resection applies to an adenoma or sessile serrated lesion 20 mm or larger.

First repeatRepeat colonoscopy at 6 months.

Subsequent repeatsRepeat again 1 year later, then 3 years later.

Inadequate bowel preparation

Standard timingRepeat colonoscopy within 12 months after an examination with inadequate bowel preparation.

Abnormal non-colonoscopic testRepeat as soon as possible when the prior examination followed an abnormal non-colonoscopic screening test.

Alarm symptomsRepeat as soon as possible when alarm symptoms are present.

Inflammatory bowel disease surveillance

Disease extentApplies to ulcerative colitis or Crohn's colitis involving at least one-third of the colon.

Start of surveillanceBegin dysplasia surveillance 8 to 10 years after diagnosis, or after symptom onset when earlier.

Repeat intervalRepeat every 1 to 5 years based on risk factors; annually for high-risk patients and for patients with primary sclerosing cholangitis.

Documentation and Review Requirements

Documentation Required

Document the indication category

Document the indication category for the request, such as average-risk screening, follow-on colonoscopy after a positive test, increased-risk screening, surveillance, hereditary or inflammatory bowel disease surveillance, or diagnostic evaluation.

Documentation Required

Record prior colonoscopy and pathology

Include the date, completeness, preparation quality, and findings of the most recent colonoscopy. Include pathology with the number, size, and histology of polyps.

Documentation Required

Document relevant family history

For a family-history indication, document the affected relationship, condition, and age at diagnosis.

Documentation Required

Provide hereditary syndrome or IBD details

For hereditary indications, provide genetic test results or syndrome criteria. For inflammatory bowel disease, document disease extent, duration, current activity, current treatment, primary sclerosing cholangitis status, and the management decision the procedure will inform.

Documentation Required

Document the diagnostic workup

For diagnostic indications, document the symptoms, relevant laboratory values, and imaging findings supporting the procedure. Relevant laboratory values may include hemoglobin and ferritin.

Documentation Required

Support the surveillance interval

Document the surveillance interval relied upon and its source so the requested timing can be evaluated against the applicable recommendation.

Documentation Required

Document therapeutic procedure details

For polypectomy or another therapeutic intervention, including CPT 45384, document the lesion treated and the technique used.

Prior Authorization

Limit approval to the supported request

When the requested quantity, units, or duration exceed what the documentation supports, approve the supported portion and send only the excess increment for physician review.

Denial Risk

Flag premature surveillance

Surveillance earlier than the applicable USMSTF interval without a new symptom, finding, incomplete examination, or inadequate preparation is not medically necessary and is referred for physician review.

Denial Risk

Avoid repeat screening within 10 years

Repeat average-risk screening colonoscopy within 10 years of a high-quality normal colonoscopy does not meet medical-necessity criteria because it is within the recommended interval.

Denial Risk

Do not routinely screen over age 85

Routine screening in members older than 85 years does not meet medical-necessity criteria because USPSTF and USMSTF do not recommend screening at this age.

Denial Risk

Individualize surveillance in older adults

Continued surveillance after age 75 with limited life expectancy and prior low-risk findings, without an individualized decision, does not meet medical-necessity criteria because risks may outweigh benefit.

Denial Risk

Do not use constipation alone as the indication

Diagnostic colonoscopy for constipation alone does not meet medical-necessity criteria when constipation has not received initial management and there is no additional qualifying indication, such as bleeding, iron-deficiency anemia, unexplained weight loss, an abnormal examination, qualifying change in bowel habits, or age-appropriate screening.

Note

Escalate unstable or contraindicated presentations

Suspected bowel obstruction, perforation, or toxic megacolon requires emergent surgical and gastroenterology evaluation. Elective colonoscopy is contraindicated until the member is stabilized.

Prior Authorization

Route unsupported early surveillance to physician review

Earlier surveillance colonoscopy without a new clinical indication does not improve outcomes and is routed to physician review.

Prior Authorization

Obtain physician review for adverse determinations

Only a licensed physician of the same or similar specialty may issue an adverse determination, and the requesting provider must first be offered a peer-to-peer discussion. Automated systems and non-physician clinical reviewers may approve a request in full or in part but may not issue an adverse determination.

Policy Scope and Background

This policy addresses colorectal cancer screening, follow-on colonoscopy after an abnormal non-colonoscopy screening test, surveillance after polyps or colorectal cancer, diagnostic evaluation, therapeutic procedures, hereditary syndromes, inflammatory bowel disease, and colonoscopy through a stoma. Average-risk screening generally begins at age 45 and continues through age 75; screening from ages 76 through 85 requires individualized consideration of health, prior screening, and preference. Surveillance intervals vary according to prior findings, examination quality, hereditary risk, inflammatory bowel disease, and prior colorectal cancer.

Key Definitions

Average risk

Personal historyNo personal history of colorectal cancer, adenomas, or sessile serrated lesions.

Inflammatory or hereditary riskNo inflammatory bowel disease and no confirmed or suspected hereditary syndrome.

Family and radiation historyNo qualifying family history and no prior abdominal or pelvic radiation for childhood cancer.

Advanced adenoma

Size criterionAn adenoma 10 mm or larger.

Histology criterionAn adenoma with tubulovillous or villous histology.

Dysplasia criterionAn adenoma with high-grade dysplasia.

Follow-on colonoscopy

Stool-based testA colonoscopy performed because a stool-based screening test was positive.

CT colonographyA colonoscopy performed because CT colonography was positive.

Flexible sigmoidoscopyA colonoscopy performed because screening flexible sigmoidoscopy was positive.

Adequate bowel preparation

Detection standardPreparation sufficient to detect polyps larger than 5 mm.

DocumentationGenerally documented with a validated bowel-preparation scale.

Example scaleFor example, the Boston Bowel Preparation Scale with each segment scored 2 or higher.