Summary & Overview

CPT 00811: Anesthesia for Lower Intestinal Endoscopic Procedure

CPT code 00811 designates anesthesia services for an unspecified lower intestinal endoscopic procedure in which an endoscope is advanced into the intestines up to, but not into, the duodenum. This code matters nationally because anesthesia billing for endoscopic procedures contributes to procedural cost, resource allocation in ambulatory surgery centers and hospitals, and claims processing for peri-procedural services. Clear coding supports appropriate payment, care coordination, and quality measurement for gastrointestinal endoscopy care.

Key payers considered in the analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. The review addresses how CPT code 00811 is used across typical sites of service such as endoscopy suites and hospital outpatient departments.

Readers will learn the clinical context of the code, where the service is typically delivered, and practical considerations relevant to national billing and policy environments. The publication summarizes benchmark uses, payer coverage patterns, and any notable policy or coding guidance affecting anesthesia for lower intestinal endoscopy. Data not available in the input are noted where applicable.

AetnaBlue Cross Blue ShieldCigna HealthUnitedHealthcareMedicareCPT 00811anesthesiaendoscopygastroenterologyambulatory surgeryhospital outpatientprocedure codingperioperative care

Billing Code Overview

CPT code 00811 describes anesthesia services provided for a patient undergoing an unspecified lower intestinal endoscopic procedure in which the surgical provider introduces an endoscope into the intestines up to, but not into, the duodenum (the portion of the small intestine just below the stomach).

Service type: Anesthesia for lower intestinal endoscopic procedure
Typical site of service: Endoscopy suite or hospital outpatient department where lower intestinal endoscopic procedures are performed

Data not available in the input for modifiers, taxonomies, ICD-10 diagnoses, and related codes.

Clinical & Coding Specifications

Clinical Context

A typical patient is a 58-year-old with chronic iron-deficiency anemia and intermittent lower abdominal pain referred for an outpatient diagnostic colonoscopic evaluation. The gastroenterology team schedules a lower intestinal endoscopic procedure up to but not into the duodenum to visualize the colon and terminal ileum. The anesthesia provider meets the patient in pre-op, reviews history, airway, and comorbidities (e.g., coronary artery disease, obstructive sleep apnea), obtains informed consent for monitored anesthesia care or general anesthesia as appropriate, and documents baseline vitals and ASA status.

On procedure day the patient arrives to an ambulatory surgery center or hospital endoscopy suite. Standard monitors are applied (pulse oximetry, noninvasive blood pressure, ECG, capnography if sedated), intravenous access is confirmed, and sedation is administered per the anesthesia plan. The gastroenterologist advances the endoscope through the rectum, colon, and may intubate the terminal ileum; the anesthesia provider maintains sedation depth and physiologic stability. Post-procedure the patient is recovered in a PACU or endoscopy recovery area until discharge criteria are met or the patient is admitted if complications occur.

Coding Specifications

Modifier	Description	When to Use
`23`	Unusual Anesthesia	Use when emergency or unusual circumstances require general anesthesia for a procedure usually performed with sedation.

Taxonomy Code	Specialty	Notes
207L00000X	Anesthesiology	Primary specialty providing anesthesia services for endoscopic procedures.
207RC0000X	Anesthesiology - Critical Care	Involved for high-risk patients requiring critical care expertise.
207K00000X	Nurse Anesthetist	CRNAs commonly deliver monitored anesthesia care or general anesthesia in endoscopy suites.
207S00000X	Gastroenterology	Proceduralist performing the lower intestinal endoscopic evaluation.
2084P0800X	General Surgery	Surgeons may perform advanced endoscopic or combined procedures in the intestines.

ICD-10 Code	Description	Clinical Relevance
`K52.9`	Noninfective gastroenteritis and colitis, unspecified	Presents with abdominal pain or bleeding prompting diagnostic colonoscopy.
`K50.90`	Crohn's disease, unspecified, without complications	Indication for colonoscopy to evaluate extent and activity of disease.
`K51.90`	Ulcerative colitis, unspecified, without complications	Colonoscopic assessment for disease severity and surveillance.
`K57.30`	Diverticulosis of large intestine without perforation or abscess without bleeding	Evaluated during colonoscopy for diverticular disease or bleeding.
`R19.5`	Other fecal abnormalities	Symptoms leading to endoscopic evaluation.
`D50.9`	Iron deficiency anemia, unspecified	Common indication for colonoscopy to rule out lower GI bleeding.
`K63.5`	Polyp of colon	Detection and removal frequently performed during colonoscopy.

Related CPT Codes

CPT Code	Description	Relationship to This Procedure
`00812`	Anesthesia for lower intestinal endoscopic procedures with endoscope introduced into the duodenum	Alternative anesthesia code when endoscope is advanced into the duodenum; closely related based on extent of endoscope insertion.
`00740`	Anesthesia for upper gastrointestinal endoscopic procedures	May be used when combined upper and lower endoscopy are performed during same operative session, requiring separate anesthesia coding considerations.
`45378`	Colonoscopy, flexible, diagnostic, including collection of specimen by brushing or washing, when performed (separate procedure codes exist for biopsy/polypectomy)	The primary gastroenterology procedure typically performed during the anesthetized session; anesthesia code `00811` covers the anesthesia portion.
`45385`	Colonoscopy with removal of tumor(s), polyp(s), or other lesion(s) by snare technique	Therapeutic colonoscopic interventions that may occur during the same session and affect anesthesia time and complexity.
`99152`	Moderate sedation services provided by the physician performing a diagnostic or therapeutic service, initial 15 minutes	Captures non-anesthesia moderate sedation when the proceduralist provides sedation rather than a qualified anesthesia provider; relevant when anesthesia services are not billed.

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