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CPT 49000: Intra-Abdominal Exploration with Biopsy

CPT code 49000 represents an intra-abdominal exploratory procedure with biopsy performed to identify causes of abdominal pain, masses, suspected trauma, or infection. This operative diagnostic service is significant nationally because it frequently influences definitive diagnosis and subsequent therapeutic decisions in acute and complex abdominal presentations. Use of this code spans hospital-based surgical practice and ambulatory surgery settings where operative exploration and specimen collection are indicated.

Key payers covered in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise overview of clinical context for CPT code 49000, typical sites of service, common payer coverage considerations, and the set of modifiers commonly reported with this service. The publication highlights national reimbursement benchmarks, coding and billing considerations, and any notable policy updates affecting claim adjudication. Clinical context explains when operative exploration with biopsy is clinically appropriate and how documentation supports coding.

The piece is intended for coding professionals, surgical providers, and revenue cycle managers seeking a clear, practical reference for CPT code 49000 and its role in hospital-based diagnostic surgical care. Data not available in the input will be explicitly marked.

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Billing Code Overview

CPT code 49000 describes an intra-abdominal exploratory procedure in which the provider inspects the abdominal cavity, including the space between the abdominal wall and the membrane that encloses the abdominal organs, to determine the cause of abdominal pain, palpable masses, suspected traumatic injury, or signs of infection. The procedure includes obtaining a sample of suspicious tissue for laboratory analysis.

Service type: Diagnostic surgical exploration with biopsy
Typical site of service: Hospital operating room or surgical suite; may also occur in an ambulatory surgery center depending on clinical circumstances and facility capabilities

Data not available in the input.

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CPT 49000: Intra-Abdominal Exploration with Biopsy

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Billing Code Overview

Service type: Diagnostic surgical exploration with biopsy
Typical site of service: Hospital operating room or surgical suite; may also occur in an ambulatory surgery center depending on clinical circumstances and facility capabilities

Data not available in the input.

Clinical & Coding Specifications

Clinical Context

A 48-year-old patient presents to the emergency department with acute-onset severe lower abdominal pain, fever, and localized guarding. Initial evaluation with history, physical examination, laboratory studies, and abdominal ultrasound is inconclusive for the source of sepsis or an intra-abdominal mass. The surgical team recommends diagnostic open abdominal exploration with biopsy to identify intra-abdominal pathology. The patient is taken to the operating room, given general anesthesia, and a midline incision is made. The provider systematically examines the peritoneal cavity, inspects the small and large intestines, liver surface, omentum, and mesentery, and palpates for occult masses or sites of trauma. Any suspicious lesion or abnormal tissue is sampled and submitted as a biopsy to pathology. Intraoperative findings guide immediate management decisions (for example, drainage of abscess, resection of necrotic tissue, or staging of a suspected malignancy). The procedure is documented with indication, findings, tissue sampled, specimen labeling, and disposition of specimens to the laboratory. Typical workflow includes preoperative consent, perioperative antibiotics as indicated, operative dictation, and postoperative pathology correlation to guide definitive treatment planning.

Coding Specifications

Modifier	Description	When to Use
`22`	Increased procedural services	Use when the operative report documents substantially greater work, complexity, or time than usual for the procedure.
`52`	Reduced services	Use when the procedure is partially reduced or not completed as planned.
`53`	Discontinued procedure	Use if the procedure was started but terminated due to extenuating circumstances prior to completion.
`59`	Distinct procedural service	Use when a separate, distinct procedure is performed during the same operative session that is not normally bundled.
`62`	Two surgeons	Use when two surgeons work together as primary surgeons performing distinct portions of the operation.
`63`	Procedure performed on infants less than 4 kg	Use for qualifying neonatal patients when applicable.
`66`	Surgical team (team approach)	Use when multiple surgeons from different specialties function as a surgical team.
`78`	Return to operating room for related procedure following initial service	Use when an unplanned return to the OR for a related procedure occurs during the postoperative period.
`79`	Unrelated procedure or service by the same physician during the postoperative period	Use for an unrelated procedure during the global period.
`24`	Unrelated evaluation and management service during a postoperative period	Use when unrelated E/M occurs during the global period (Note: not in raw list; excluded).

Taxonomy Code	Specialty	Notes
208800000X	General Surgery	Most common specialty performing open abdominal exploration and intra-abdominal biopsy.
207L00000X	Vascular Surgery	May be involved when vascular injury or mesenteric ischemia is suspected.
207K00000X	Colon & Rectal Surgery	Involved when pathology is localized to the colon or rectum and biopsy guides further colorectal management.
193200000X	Surgical Oncology	Performs diagnostic exploration and biopsies for suspected intra-abdominal malignancy.
2086S0122X	Trauma Surgery	Performs exploratory laparotomy in traumatic abdominal injury scenarios.

Related Diagnoses

ICD-10 Code	Description	Clinical Relevance
`K35.80`	Unspecified acute appendicitis	Appendicitis can present with acute abdominal pain requiring exploration and biopsy if atypical or complicated.
`K65.9`	Peritonitis, unspecified	Peritonitis is an indication for exploratory laparotomy to identify source and obtain cultures/biopsy.
`K57.30`	Diverticulosis of large intestine without perforation or abscess	Complicated diverticular disease may require exploration and tissue sampling if malignancy or complication suspected.
`C78.7`	Secondary malignant neoplasm of liver and intrahepatic bile duct	Suspected metastatic disease may prompt biopsy during abdominal exploration for diagnosis and staging.
`S36.591A`	Other injury of spleen, initial encounter	Traumatic intra-abdominal injury necessitating exploration and possible biopsy or tissue assessment.

Related CPT Codes

CPT Code	Description	Relationship to This Procedure
`10120`	Incision and removal of foreign body, subcutaneous tissues; simple	May be performed if a superficial foreign body is encountered and requires removal in the operative field.
`10180`	Incision and removal of foreign body, deep (e.g., in muscle or tendon sheath)	Used when deeper retained foreign bodies are identified during exploration and require removal.
`38220`	Bone marrow biopsy, needle or trocar	Not generally related; Data not available in the input.
`49002`	Diagnostic abdominal paracentesis (peritoneal tap)	May be performed preoperatively or intraoperatively to obtain ascitic fluid for analysis when fluid is present.
`49010`	Paracentesis, diagnostic; with imaging guidance	Used when image guidance is required to safely obtain peritoneal fluid prior to or during operative evaluation.

CPT 49002: Reopening of Abdominal Incision for Exploration

CPT-49010-RETROPERITONEAL-EXPLORATION-WITH-BIOPSY

CPT 49010: Retroperitoneal Exploration with Biopsy

CPT-49013-PELVIC-PREPERITONEAL-PACKING-FOR-HEMORRHAGE-CONTROL

CPT 49013: Preperitoneal Pelvic Packing for Hemorrhage Control

CPT-49014-PELVIC-CAVITY-REOPENING-AND-REMOVAL-OF-PACKING

CPT 49014: Reopening Pelvic Cavity and Removal of Preperitoneal Packing

CPT-49020-OPEN-INCISION-DRAINAGE-INTRA-ABDOMINAL-ABSCESS

CPT 49020: Open Incision and Drainage of Intra‑abdominal Abscess

CPT-49040-SUBDIAPHRAGMATIC-ABSCESS-INCISION-AND-DRAINAGE

CPT 49040: Incision and Drainage of Subdiaphragmatic Abscess

CPT-49060-RETROPERITONEAL-ABSCESS-DRAINAGE-OPEN

CPT 49060: Incision and Drainage of Retroperitoneal Abscess

CPT-49062-EXTRAPERITONEAL-LYMPHATIC-FLUID-DRAINAGE

CPT 49062: Extraperitoneal Lymphatic Fluid Drainage

CPT-49082-ABDOMINAL-PARACENTESIS-WITHOUT-IMAGING

CPT 49082: Abdominal Paracentesis Without Imaging

CPT-49083-IMAGE-GUIDED-ABDOMINAL-PARACENTESIS

CPT 49083: Image-Guided Abdominal Paracentesis

Showing 1–10 of 11

References

1.CPT® Codes and Descriptions. AAPC. Retrieved Jul 29, 2026.
2.HCPCS Quarterly Update. Centers for Medicare & Medicaid Services (CMS). Retrieved Jul 29, 2026.
3.ICD-10-CM Full Code List. Centers for Medicare & Medicaid Services (CMS). Retrieved Jul 29, 2026.

Published by

Trek Health powers OpenPayer with a leading commercial payer intelligence platform, seamlessly converting fragmented payer data into actionable insights for provider organizations.

Trek Health ingests and normalizes Transparency in Coverage data and payer policy updates to give provider organizations a clear view of how commercial reimbursement behaves across markets, payers, and services. Our platform transforms raw payer disclosures into structured intelligence that supports contract evaluation, payer negotiations, and service line strategy. By combining market benchmarks with ongoing policy visibility, Trek helps teams identify variability, risk, and opportunity in commercial reimbursement. The result is faster insight, stronger negotiating positions, and more informed financial decisions.

Clinical & Coding Specifications

Clinical Context

Coding Specifications

Modifier	Description	When to Use
`22`	Increased procedural services	Use when the operative report documents substantially greater work, complexity, or time than usual for the procedure.
`52`	Reduced services	Use when the procedure is partially reduced or not completed as planned.
`53`	Discontinued procedure	Use if the procedure was started but terminated due to extenuating circumstances prior to completion.
`59`	Distinct procedural service	Use when a separate, distinct procedure is performed during the same operative session that is not normally bundled.
`62`	Two surgeons	Use when two surgeons work together as primary surgeons performing distinct portions of the operation.
`63`	Procedure performed on infants less than 4 kg	Use for qualifying neonatal patients when applicable.
`66`	Surgical team (team approach)	Use when multiple surgeons from different specialties function as a surgical team.
`78`	Return to operating room for related procedure following initial service	Use when an unplanned return to the OR for a related procedure occurs during the postoperative period.
`79`	Unrelated procedure or service by the same physician during the postoperative period	Use for an unrelated procedure during the global period.
`24`	Unrelated evaluation and management service during a postoperative period	Use when unrelated E/M occurs during the global period (Note: not in raw list; excluded).

Taxonomy Code	Specialty	Notes
208800000X	General Surgery	Most common specialty performing open abdominal exploration and intra-abdominal biopsy.
207L00000X	Vascular Surgery	May be involved when vascular injury or mesenteric ischemia is suspected.
207K00000X	Colon & Rectal Surgery	Involved when pathology is localized to the colon or rectum and biopsy guides further colorectal management.
193200000X	Surgical Oncology	Performs diagnostic exploration and biopsies for suspected intra-abdominal malignancy.
2086S0122X	Trauma Surgery	Performs exploratory laparotomy in traumatic abdominal injury scenarios.

Related Diagnoses

ICD-10 Code	Description	Clinical Relevance
`K35.80`	Unspecified acute appendicitis	Appendicitis can present with acute abdominal pain requiring exploration and biopsy if atypical or complicated.
`K65.9`	Peritonitis, unspecified	Peritonitis is an indication for exploratory laparotomy to identify source and obtain cultures/biopsy.
`K57.30`	Diverticulosis of large intestine without perforation or abscess	Complicated diverticular disease may require exploration and tissue sampling if malignancy or complication suspected.
`C78.7`	Secondary malignant neoplasm of liver and intrahepatic bile duct	Suspected metastatic disease may prompt biopsy during abdominal exploration for diagnosis and staging.
`S36.591A`	Other injury of spleen, initial encounter	Traumatic intra-abdominal injury necessitating exploration and possible biopsy or tissue assessment.

Related CPT Codes

CPT Code	Description	Relationship to This Procedure
`10120`	Incision and removal of foreign body, subcutaneous tissues; simple	May be performed if a superficial foreign body is encountered and requires removal in the operative field.
`10180`	Incision and removal of foreign body, deep (e.g., in muscle or tendon sheath)	Used when deeper retained foreign bodies are identified during exploration and require removal.
`38220`	Bone marrow biopsy, needle or trocar	Not generally related; Data not available in the input.
`49002`	Diagnostic abdominal paracentesis (peritoneal tap)	May be performed preoperatively or intraoperatively to obtain ascitic fluid for analysis when fluid is present.
`49010`	Paracentesis, diagnostic; with imaging guidance	Used when image guidance is required to safely obtain peritoneal fluid prior to or during operative evaluation.

CPT 49002: Reopening of Abdominal Incision for Exploration

CPT-49010-RETROPERITONEAL-EXPLORATION-WITH-BIOPSY

CPT 49010: Retroperitoneal Exploration with Biopsy

CPT-49013-PELVIC-PREPERITONEAL-PACKING-FOR-HEMORRHAGE-CONTROL

CPT 49013: Preperitoneal Pelvic Packing for Hemorrhage Control

CPT-49014-PELVIC-CAVITY-REOPENING-AND-REMOVAL-OF-PACKING

CPT 49014: Reopening Pelvic Cavity and Removal of Preperitoneal Packing

CPT-49020-OPEN-INCISION-DRAINAGE-INTRA-ABDOMINAL-ABSCESS

CPT 49020: Open Incision and Drainage of Intra‑abdominal Abscess

CPT-49040-SUBDIAPHRAGMATIC-ABSCESS-INCISION-AND-DRAINAGE

CPT 49040: Incision and Drainage of Subdiaphragmatic Abscess

CPT-49060-RETROPERITONEAL-ABSCESS-DRAINAGE-OPEN

CPT 49060: Incision and Drainage of Retroperitoneal Abscess

CPT-49062-EXTRAPERITONEAL-LYMPHATIC-FLUID-DRAINAGE

CPT 49062: Extraperitoneal Lymphatic Fluid Drainage

CPT-49082-ABDOMINAL-PARACENTESIS-WITHOUT-IMAGING

CPT 49082: Abdominal Paracentesis Without Imaging

CPT-49083-IMAGE-GUIDED-ABDOMINAL-PARACENTESIS

CPT 49083: Image-Guided Abdominal Paracentesis

Showing 1–10 of 11

References

1.CPT® Codes and Descriptions. AAPC. Retrieved Jul 29, 2026.
2.HCPCS Quarterly Update. Centers for Medicare & Medicaid Services (CMS). Retrieved Jul 29, 2026.
3.ICD-10-CM Full Code List. Centers for Medicare & Medicaid Services (CMS). Retrieved Jul 29, 2026.

Published by

Trek Health powers OpenPayer with a leading commercial payer intelligence platform, seamlessly converting fragmented payer data into actionable insights for provider organizations.

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CPT 49000: Intra-Abdominal Exploration with Biopsy

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Billing Code Overview

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CPT 49000: Intra-Abdominal Exploration with Biopsy

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Billing Code Overview

Clinical & Coding Specifications

Clinical Context

Coding Specifications

Related Diagnoses

Related CPT Codes

Related Codes

References

Clinical & Coding Specifications

Clinical Context

Coding Specifications

Related Diagnoses

Related CPT Codes

Related Codes

References