Summary & Overview
CPT 45990: Diagnostic Anorectal Examination Under Anesthesia
CPT code 45990 denotes a diagnostic anorectal examination performed with the patient under anesthesia, potentially including immediate minor therapeutic maneuvers if clinically indicated. This code captures evaluations of the anus and rectum performed in an anesthetized setting, which can be necessary for adequate assessment and treatment when conscious examination is insufficient or painful. Nationally, proper use of this code affects procedural reporting, facility and professional payment pathways, and case mix for surgical services.
Key payers covered in this summary include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. The discussion addresses how this service is typically billed across payers, common clinical contexts that prompt use of an anesthetized anorectal exam, and the places of service where the procedure commonly occurs.
Readers will find benchmarks and practical reference points for coding and billing this service, a concise clinical context outlining when an anesthetized anorectal exam is appropriate, and a summary of payer considerations and documentation expectations. Data not available in the input will be noted where applicable.
Billing Code Overview
CPT code 45990 describes a diagnostic anorectal examination performed with the patient under anesthesia. The procedure includes inspection and palpation of the anus and rectum while the patient is anesthetized and may include any additional limited procedure the provider deems necessary to treat a condition discovered during the exam.
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Service type: Diagnostic anorectal examination with possible minor therapeutic intervention as indicated
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Typical site of service: Operating room or procedure suite where anesthesia is administered
Clinical & Coding Specifications
Clinical Context
A typical patient is a 48-year-old presenting with chronic rectal bleeding, painful defecation, and a palpable anal mass. After outpatient evaluation including history, focused anorectal exam, anoscopy, and failed conservative therapy, the surgeon schedules a diagnostic anorectal examination under anesthesia (CPT 45990) to fully inspect the anal canal and rectum and to allow treatment of identified pathology. In the operating room or procedure suite the patient receives regional or general anesthesia. The provider performs a thorough digital and anoscopic/rectal examination, and may proceed to excise an anal fissure or thrombosed external hemorrhoid, perform sphincterotomy, drainage of an abscess, or targeted biopsy if an abnormal lesion is found. Typical workflow: preoperative assessment and consent, anesthesia induction, diagnostic exam under anesthesia with possible minor procedures, specimen submission if biopsy performed, recovery and postoperative instructions.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
22 | Increased procedural services | Use when work required is substantially greater than usual for CPT 45990 (document increased complexity). |