ICD-10-PCS Code For Abdomen And Pelvis: Procedure Code Group Overview

The International Classification of Diseases, Tenth Revision, Procedure Coding System (ICD-10-PCS) code group CW21 includes procedures performed to capture three-dimensional nuclear medicine images of the abdomen and pelvis. These ICD-10-PCS codes are used for inpatient documentation when tomographic nuclear medicine imaging using introduced radioactive materials is performed to evaluate abdominal and pelvic organs or pathology. Accurate coding within the ICD-10-PCS CW21 group is essential for proper inpatient reimbursement, as it captures the procedure performed and supports clinical documentation accuracy.

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Abdomen And Pelvis Tomographic Nuclear Medicine Imaging Procedure Overview

This procedure group includes tomographic nuclear medicine imaging studies that capture three-dimensional images of the abdomen and pelvis by detecting radioactive emissions. These procedures target the anatomical regions of the abdomen and pelvis and use radioactive tracers administered into the body to visualize organ function and structure. Accurate ICD-10-PCS coding ensures inpatient records reflect the specific imaging modality and anatomical focus, which supports correct case mix assignment and reimbursement.

Code Attributes

Character	ICD-10-PCS Category	Code Group Details
C	Section	Nuclear Medicine
W	Body System	Anatomical Regions
2	Operation	Tomographic (Tomo) Nuclear Medicine Imaging
1	Body Part	Abdomen and Pelvis

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ICD-10-PCS Code For Abdomen And Pelvis: Procedure Code Group Overview

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Abdomen And Pelvis Tomographic Nuclear Medicine Imaging Procedure Overview

Code Attributes

Character	ICD-10-PCS Category	Code Group Details
C	Section	Nuclear Medicine
W	Body System	Anatomical Regions
2	Operation	Tomographic (Tomo) Nuclear Medicine Imaging
1	Body Part	Abdomen and Pelvis

When to Use

Use codes from this group when tomographic nuclear medicine imaging of abdominal and pelvic regions is performed with introduced radioactive materials for diagnostic or functional evaluation. Assign these codes when the imaging study is performed in the inpatient setting and documentation specifies the abdomen and pelvis as the body part and tomographic nuclear medicine as the operation.

ICD-10-PCS Codes

8 rows

ICD-10-PCS Code	Description
CW211ZZ	Tomographic (Tomo) Nuclear Medicine Imaging of Abdomen and Pelvis using Technetium 99m (Tc-99m)
CW21DZZ	Tomographic (Tomo) Nuclear Medicine Imaging of Abdomen and Pelvis using Indium 111 (In-111)
CW21FZZ	Tomographic (Tomo) Nuclear Medicine Imaging of Abdomen and Pelvis using Iodine 123 (I-123)
CW21GZZ	Tomographic (Tomo) Nuclear Medicine Imaging of Abdomen and Pelvis using Iodine 131 (I-131)
CW21KZZ	Tomographic (Tomo) Nuclear Medicine Imaging of Abdomen and Pelvis using Fluorine 18 (F-18)
CW21LZZ	Tomographic (Tomo) Nuclear Medicine Imaging of Abdomen and Pelvis using Gallium 67 (Ga-67)
CW21SZZ	Tomographic (Tomo) Nuclear Medicine Imaging of Abdomen and Pelvis using Thallium 201 (Tl-201)
CW21YZZ	Tomographic (Tomo) Nuclear Medicine Imaging of Abdomen and Pelvis using Other Radionuclide

Typical Clinical Scenarios

A hospitalized adult with suspected hepatic metastases identified on prior CT undergoes tomographic nuclear medicine imaging to characterize liver lesions and assess whole-abdomen and pelvic involvement before oncology treatment planning; inpatient monitoring is required due to recent chemotherapy and the study uses a PET tracer to evaluate metabolic activity. Typical codes: CW21KZZ
An elderly patient admitted from the emergency department with fever of unknown origin and suspected intra-abdominal abscess undergoes tomographic nuclear medicine imaging using a gallium tracer to localize occult pelvic or abdominal infectious foci when conventional imaging is inconclusive; the study helps guide interventional drainage decisions during the same admission. Typical codes: CW21LZZ
A young adult with known neuroendocrine tumor is admitted for staging and functional localization of tumor burden after equivocal anatomic imaging; tomographic nuclear medicine imaging with an iodine or indium radiotracer is performed to detect somatostatin receptor–positive lesions in the abdomen and pelvis to direct surgical or targeted therapy. Typical codes: CW21DZZ, CW21FZZ

Related Codes

CW20-ABDOMEN-TOMOGRAPHIC-IMAGING

ICD-10-PCS Code For Abdomen: Procedure Code Group Overview

CW23-CHEST-TOMOGRAPHIC-NUCLEAR-MEDICINE

ICD-10-PCS Code For Chest: Procedure Code Group Overview

CW24-CHEST-AND-ABDOMEN-TOMOGRAPHIC

ICD-10-PCS Code For Chest And Abdomen: Procedure Code Group Overview

CW26-CHEST-NECK-TOMOGRAPHIC

ICD-10-PCS Code For Chest And Neck: Procedure Code Group Overview

CW2B-HEAD-AND-NECK-TOMOGRAPHIC

ICD-10-PCS Code For Head And Neck: Procedure Code Group Overview

CW2D-LOWER-EXTREMITY-TOMOGRAPHIC-IMAGING

ICD-10-PCS Code For Lower Extremity: Procedure Code Group Overview

CW2J-PELVIC-REGION-TOMOGRAPHIC-IMAGING

ICD-10-PCS Code for Pelvic Region: Procedure Code Group Overview

CW2M-UPPER-EXTREMITY-TOMOGRAPHIC-IMAGING

ICD-10-PCS Code For Upper Extremity: Procedure Code Group Overview

CW2Y-MULTIPLE-ANATOMICAL-REGIONS-TOMOGRAPHIC

ICD-10-PCS Code For Multiple Anatomical Regions: Procedure Code Group Overview

Frequently Asked Questions

References

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.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.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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When to Use

ICD-10-PCS Codes

8 rows

ICD-10-PCS Code	Description
CW211ZZ	Tomographic (Tomo) Nuclear Medicine Imaging of Abdomen and Pelvis using Technetium 99m (Tc-99m)
CW21DZZ	Tomographic (Tomo) Nuclear Medicine Imaging of Abdomen and Pelvis using Indium 111 (In-111)
CW21FZZ	Tomographic (Tomo) Nuclear Medicine Imaging of Abdomen and Pelvis using Iodine 123 (I-123)
CW21GZZ	Tomographic (Tomo) Nuclear Medicine Imaging of Abdomen and Pelvis using Iodine 131 (I-131)
CW21KZZ	Tomographic (Tomo) Nuclear Medicine Imaging of Abdomen and Pelvis using Fluorine 18 (F-18)
CW21LZZ	Tomographic (Tomo) Nuclear Medicine Imaging of Abdomen and Pelvis using Gallium 67 (Ga-67)
CW21SZZ	Tomographic (Tomo) Nuclear Medicine Imaging of Abdomen and Pelvis using Thallium 201 (Tl-201)
CW21YZZ	Tomographic (Tomo) Nuclear Medicine Imaging of Abdomen and Pelvis using Other Radionuclide

Typical Clinical Scenarios

A hospitalized adult with suspected hepatic metastases identified on prior CT undergoes tomographic nuclear medicine imaging to characterize liver lesions and assess whole-abdomen and pelvic involvement before oncology treatment planning; inpatient monitoring is required due to recent chemotherapy and the study uses a PET tracer to evaluate metabolic activity. Typical codes: CW21KZZ
An elderly patient admitted from the emergency department with fever of unknown origin and suspected intra-abdominal abscess undergoes tomographic nuclear medicine imaging using a gallium tracer to localize occult pelvic or abdominal infectious foci when conventional imaging is inconclusive; the study helps guide interventional drainage decisions during the same admission. Typical codes: CW21LZZ
A young adult with known neuroendocrine tumor is admitted for staging and functional localization of tumor burden after equivocal anatomic imaging; tomographic nuclear medicine imaging with an iodine or indium radiotracer is performed to detect somatostatin receptor–positive lesions in the abdomen and pelvis to direct surgical or targeted therapy. Typical codes: CW21DZZ, CW21FZZ

Related Codes

CW20-ABDOMEN-TOMOGRAPHIC-IMAGING

ICD-10-PCS Code For Abdomen: Procedure Code Group Overview

CW23-CHEST-TOMOGRAPHIC-NUCLEAR-MEDICINE

ICD-10-PCS Code For Chest: Procedure Code Group Overview

CW24-CHEST-AND-ABDOMEN-TOMOGRAPHIC

ICD-10-PCS Code For Chest And Abdomen: Procedure Code Group Overview

CW26-CHEST-NECK-TOMOGRAPHIC

ICD-10-PCS Code For Chest And Neck: Procedure Code Group Overview

CW2B-HEAD-AND-NECK-TOMOGRAPHIC

ICD-10-PCS Code For Head And Neck: Procedure Code Group Overview

CW2D-LOWER-EXTREMITY-TOMOGRAPHIC-IMAGING

ICD-10-PCS Code For Lower Extremity: Procedure Code Group Overview

CW2J-PELVIC-REGION-TOMOGRAPHIC-IMAGING

ICD-10-PCS Code for Pelvic Region: Procedure Code Group Overview

CW2M-UPPER-EXTREMITY-TOMOGRAPHIC-IMAGING

ICD-10-PCS Code For Upper Extremity: Procedure Code Group Overview

CW2Y-MULTIPLE-ANATOMICAL-REGIONS-TOMOGRAPHIC

ICD-10-PCS Code For Multiple Anatomical Regions: Procedure Code Group Overview

Frequently Asked Questions

References

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.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.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.

Published by

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

ICD-10-PCS Code For Abdomen And Pelvis: Procedure Code Group Overview

Sign up for ICD-10-PCS Code For Abdomen And Pelvis: Procedure Code Group Overview policy alerts

Abdomen And Pelvis Tomographic Nuclear Medicine Imaging Procedure Overview

Code Attributes

ICD-10-PCS Code For Abdomen And Pelvis: Procedure Code Group Overview

Sign up for ICD-10-PCS Code For Abdomen And Pelvis: Procedure Code Group Overview policy alerts

Abdomen And Pelvis Tomographic Nuclear Medicine Imaging Procedure Overview

Code Attributes

When to Use

ICD-10-PCS Codes

Typical Clinical Scenarios

Related Codes

Which ICD-10-PCS section and operation describe the CW21 code group?

What anatomy and imaging modality does the CW21 group cover?

How does accurate coding of CW21 impact inpatient documentation and reimbursement?

What specific radionuclides are listed under the CW21 code set?

When should CW21 codes be used for inpatient documentation?

References

When to Use

ICD-10-PCS Codes

Typical Clinical Scenarios

Related Codes

Which ICD-10-PCS section and operation describe the CW21 code group?

What anatomy and imaging modality does the CW21 group cover?

How does accurate coding of CW21 impact inpatient documentation and reimbursement?

What specific radionuclides are listed under the CW21 code set?

When should CW21 codes be used for inpatient documentation?

References