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

The International Classification of Diseases, Tenth Revision, Procedure Coding System (ICD-10-PCS) code group CW5D includes procedures performed to introduce radioactive materials for nonimaging probe studies in the lower extremity. These ICD-10-PCS codes are used for inpatient documentation when a probe-based nuclear medicine study is performed to evaluate distribution or measure absorption in the lower extremity. Accurate coding within the ICD-10-PCS CW5D group is essential for proper inpatient reimbursement, as it captures the specific nuclear medicine procedure performed and supports clinical documentation accuracy.

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Lower Extremity Nonimaging Nuclear Medicine Probe Procedure Overview

This procedure group includes nonimaging nuclear medicine probe studies of the lower extremity that introduce radioactive materials to evaluate distribution or measure absorption using an external detector. Procedures target anatomical regions of the lower extremity and use probe-based detection rather than imaging modalities. Accurate ICD-10-PCS coding is important for inpatient reimbursement because it documents the specialized nuclear medicine technique performed and supports appropriate case mix assignment.

Code Attributes

Character	ICD-10-PCS Category	Code Group Details
C	Section	Nuclear Medicine
W	Body System	Anatomical Regions
5	Operation	Nonimaging Nuclear Medicine Probe
D	Body Part	Lower Extremity

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

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Lower Extremity Nonimaging Nuclear Medicine Probe Procedure Overview

Code Attributes

Character	ICD-10-PCS Category	Code Group Details
C	Section	Nuclear Medicine
W	Body System	Anatomical Regions
5	Operation	Nonimaging Nuclear Medicine Probe
D	Body Part	Lower Extremity

When to Use

Use codes from this group when a nonimaging nuclear medicine probe procedure is performed on the lower extremity involving introduction of radioactive material. These codes apply when the clinical objective is to detect radioactive emissions or measure absorption with a probe rather than perform diagnostic imaging.

ICD-10-PCS Codes

3 rows

ICD-10-PCS Code	Description
CW5D1ZZ	Nonimaging Nuclear Medicine Probe of Lower Extremity using Technetium 99m (Tc-99m)
CW5DDZZ	Nonimaging Nuclear Medicine Probe of Lower Extremity using Indium 111 (In-111)
CW5DYZZ	Nonimaging Nuclear Medicine Probe of Lower Extremity using Other Radionuclide

Typical Clinical Scenarios

An elderly patient admitted for evaluation of unexplained unilateral lower extremity swelling and persistent pain after deep venous thrombosis was suspected but duplex ultrasound results were equivocal. A nonimaging nuclear medicine probe study is performed after administration of a Tc-99m radiotracer to assess venous flow dynamics and tracer distribution in the affected lower extremity to help differentiate venous insufficiency from recurrent thrombus. The probe-based measurement is chosen because bedside detection of radiotracer activity across the limb can supplement prior imaging in the inpatient setting. Typical codes: CW5D1ZZ
A middle-aged patient scheduled for inpatient evaluation of chronic unilateral lower extremity ischemic symptoms undergoes a planned nonimaging nuclear medicine probe procedure to measure regional perfusion after injection of a radiotracer. The study uses an external probe to detect Tc-99m activity distribution in muscle and soft tissues of the lower extremity to guide further vascular intervention planning during the same hospitalization. This elective, diagnostic probe study is part of the workup preceding revascularization decisions. Typical codes: CW5D1ZZ
A hospitalized patient with a history of limb-sparing surgery and suspected localized infection or altered soft-tissue perfusion has prior Tc-99m study findings inconclusive due to tracer overlap; clinicians perform a targeted nonimaging probe study using an alternative radionuclide (In-111 or another specified tracer) to clarify distribution and localize the process in the lower extremity. The probe-based repeat study is performed to resolve diagnostic uncertainty and influence ongoing inpatient management. Typical codes: CW5DDZZ, CW5DYZZ

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

CW51-ABDOMEN-AND-PELVIS-NONIMAGING

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

CW53-CHEST-NONIMAGING-PROBE

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

CW54-CHEST-AND-ABDOMEN-NONIMAGING

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

CW56-CHEST-AND-NECK-NONIMAGING

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

CW5B-HEAD-AND-NECK-NONIMAGING

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

CW5J-PELVIC-REGION-NONIMAGING-NUCLEAR

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

CW5M-UPPER-EXTREMITY-NONIMAGING-PROBE

ICD-10-PCS Code For Upper Extremity: 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

3 rows

ICD-10-PCS Code	Description
CW5D1ZZ	Nonimaging Nuclear Medicine Probe of Lower Extremity using Technetium 99m (Tc-99m)
CW5DDZZ	Nonimaging Nuclear Medicine Probe of Lower Extremity using Indium 111 (In-111)
CW5DYZZ	Nonimaging Nuclear Medicine Probe of Lower Extremity using Other Radionuclide

Typical Clinical Scenarios

An elderly patient admitted for evaluation of unexplained unilateral lower extremity swelling and persistent pain after deep venous thrombosis was suspected but duplex ultrasound results were equivocal. A nonimaging nuclear medicine probe study is performed after administration of a Tc-99m radiotracer to assess venous flow dynamics and tracer distribution in the affected lower extremity to help differentiate venous insufficiency from recurrent thrombus. The probe-based measurement is chosen because bedside detection of radiotracer activity across the limb can supplement prior imaging in the inpatient setting. Typical codes: CW5D1ZZ
A middle-aged patient scheduled for inpatient evaluation of chronic unilateral lower extremity ischemic symptoms undergoes a planned nonimaging nuclear medicine probe procedure to measure regional perfusion after injection of a radiotracer. The study uses an external probe to detect Tc-99m activity distribution in muscle and soft tissues of the lower extremity to guide further vascular intervention planning during the same hospitalization. This elective, diagnostic probe study is part of the workup preceding revascularization decisions. Typical codes: CW5D1ZZ
A hospitalized patient with a history of limb-sparing surgery and suspected localized infection or altered soft-tissue perfusion has prior Tc-99m study findings inconclusive due to tracer overlap; clinicians perform a targeted nonimaging probe study using an alternative radionuclide (In-111 or another specified tracer) to clarify distribution and localize the process in the lower extremity. The probe-based repeat study is performed to resolve diagnostic uncertainty and influence ongoing inpatient management. Typical codes: CW5DDZZ, CW5DYZZ

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

CW51-ABDOMEN-AND-PELVIS-NONIMAGING

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

CW53-CHEST-NONIMAGING-PROBE

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

CW54-CHEST-AND-ABDOMEN-NONIMAGING

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

CW56-CHEST-AND-NECK-NONIMAGING

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

CW5B-HEAD-AND-NECK-NONIMAGING

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

CW5J-PELVIC-REGION-NONIMAGING-NUCLEAR

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

CW5M-UPPER-EXTREMITY-NONIMAGING-PROBE

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

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Lower Extremity Nonimaging Nuclear Medicine Probe Procedure Overview

Code Attributes

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

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Lower Extremity Nonimaging Nuclear Medicine Probe Procedure Overview

Code Attributes

When to Use

ICD-10-PCS Codes

Typical Clinical Scenarios

Related Codes

References

When to Use

ICD-10-PCS Codes

Typical Clinical Scenarios

Related Codes

References

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

Sign up for ICD-10-PCS Code For Lower Extremity: Procedure Code Group Overview policy alerts

Lower Extremity Nonimaging Nuclear Medicine Probe Procedure Overview

Code Attributes

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

Sign up for ICD-10-PCS Code For Lower Extremity: Procedure Code Group Overview policy alerts

Lower Extremity Nonimaging Nuclear Medicine Probe Procedure Overview

Code Attributes

When to Use

ICD-10-PCS Codes

Typical Clinical Scenarios

Related Codes

Which procedures are included in the ICD-10-PCS code group CW5D for the lower extremity?

What is the primary operation described by the CW5D code group?

How should documentation support coding when using a CW5D code?

In which ICD-10-PCS section and body system are CW5D codes classified?

Are there related DRGs listed for the CW5D lower extremity code group?

References

When to Use

ICD-10-PCS Codes

Typical Clinical Scenarios

Related Codes

Which procedures are included in the ICD-10-PCS code group CW5D for the lower extremity?

What is the primary operation described by the CW5D code group?

How should documentation support coding when using a CW5D code?

In which ICD-10-PCS section and body system are CW5D codes classified?

Are there related DRGs listed for the CW5D lower extremity code group?

References