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

The International Classification of Diseases, Tenth Revision, Procedure Coding System (ICD-10-PCS) code group CW7G includes procedures performed to introduce unsealed radioactive materials systemically for therapy in the thyroid. These ICD-10-PCS codes are used for inpatient documentation when systemic nuclear medicine therapy with unsealed radioactive materials is administered to treat thyroid conditions. Accurate coding within the ICD-10-PCS CW7G group is essential for proper inpatient reimbursement, as it captures the procedure performed and supports clinical documentation accuracy.

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Thyroid Systemic Nuclear Medicine Therapy Procedure Overview

Procedures in this group involve the introduction of unsealed radioactive materials into the body to deliver systemic nuclear medicine therapy targeted to the thyroid. These procedures are performed within the nuclear medicine section and target the anatomical thyroid region to treat thyroid disease. Accurate coding of these systemic nuclear medicine therapy procedures ensures inpatient records reflect the treatment provided and supports appropriate case mix and payment determination.

Code Attributes

Character	ICD-10-PCS Category	Code Group Details
C	Section	Nuclear Medicine
W	Body System	Anatomical Regions
7	Operation	Systemic Nuclear Medicine Therapy
G	Body Part	Thyroid

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

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Thyroid Systemic Nuclear Medicine Therapy Procedure Overview

Code Attributes

Character	ICD-10-PCS Category	Code Group Details
C	Section	Nuclear Medicine
W	Body System	Anatomical Regions
7	Operation	Systemic Nuclear Medicine Therapy
G	Body Part	Thyroid

When to Use

Use a code from this group when a patient receives systemic administration of unsealed radioactive materials for therapeutic treatment of the thyroid during an inpatient stay. Codes apply when the radioactive material is introduced into the body systemically rather than applied locally or as a sealed source.

ICD-10-PCS Codes

2 rows

ICD-10-PCS Code	Description
CW7GGZZ	Systemic Nuclear Medicine Therapy of Thyroid using Iodine 131 (I-131)
CW7GYZZ	Systemic Nuclear Medicine Therapy of Thyroid using Other Radionuclide

Typical Clinical Scenarios

A 68-year-old patient with metastatic, radioactive-avid differentiated thyroid carcinoma is admitted for inpatient systemic therapy because of extensive pulmonary metastases and the need for therapeutic hospitalization due to high-dose radiation precautions and monitoring for acute radiation thyroiditis. The patient receives a measured systemic dose of unsealed radioactive iodine to ablate metastatic thyroid tissue and reduce tumor burden. Typical codes: CW7GGZZ
A 45-year-old patient with toxic multinodular goiter presents for a planned inpatient therapeutic dose of radioactive iodine after failure of antithyroid medications and beta-blockade; hospitalization is arranged for administration and observation given comorbid cardiac disease and need for isolation precautions. Systemic administration of unsealed radioactive iodine is performed to reduce thyroid hormone production and control thyrotoxicosis. Typical codes: CW7GGZZ
A 72-year-old patient with recurrent hyperthyroidism after prior subtotal thyroid surgery is admitted for inpatient systemic radionuclide therapy because surgical reoperation is high risk; the team administers an alternative radionuclide agent due to prior iodine allergy or supply considerations. Systemic nuclear medicine therapy using a non–I-131 radionuclide is given to ablate residual thyroid tissue. Typical codes: CW7GYZZ

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

CW73-CHEST-SYSTEMIC-NUCLEAR-MEDICINE-THERAPY

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

CW7N-WHOLE-BODY-SYSTEMIC-THERAPY

ICD-10-PCS Code For Whole Body: Procedure Code Group Overview

CW7Y-ANATOMICAL-REGIONS-SYSTEMIC-THERAPY

ICD-10-PCS Code For 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

2 rows

ICD-10-PCS Code	Description
CW7GGZZ	Systemic Nuclear Medicine Therapy of Thyroid using Iodine 131 (I-131)
CW7GYZZ	Systemic Nuclear Medicine Therapy of Thyroid using Other Radionuclide

Typical Clinical Scenarios

A 68-year-old patient with metastatic, radioactive-avid differentiated thyroid carcinoma is admitted for inpatient systemic therapy because of extensive pulmonary metastases and the need for therapeutic hospitalization due to high-dose radiation precautions and monitoring for acute radiation thyroiditis. The patient receives a measured systemic dose of unsealed radioactive iodine to ablate metastatic thyroid tissue and reduce tumor burden. Typical codes: CW7GGZZ
A 45-year-old patient with toxic multinodular goiter presents for a planned inpatient therapeutic dose of radioactive iodine after failure of antithyroid medications and beta-blockade; hospitalization is arranged for administration and observation given comorbid cardiac disease and need for isolation precautions. Systemic administration of unsealed radioactive iodine is performed to reduce thyroid hormone production and control thyrotoxicosis. Typical codes: CW7GGZZ
A 72-year-old patient with recurrent hyperthyroidism after prior subtotal thyroid surgery is admitted for inpatient systemic radionuclide therapy because surgical reoperation is high risk; the team administers an alternative radionuclide agent due to prior iodine allergy or supply considerations. Systemic nuclear medicine therapy using a non–I-131 radionuclide is given to ablate residual thyroid tissue. Typical codes: CW7GYZZ

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

CW73-CHEST-SYSTEMIC-NUCLEAR-MEDICINE-THERAPY

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

CW7N-WHOLE-BODY-SYSTEMIC-THERAPY

ICD-10-PCS Code For Whole Body: Procedure Code Group Overview

CW7Y-ANATOMICAL-REGIONS-SYSTEMIC-THERAPY

ICD-10-PCS Code For 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.

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

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Thyroid Systemic Nuclear Medicine Therapy Procedure Overview

Code Attributes

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

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Thyroid Systemic Nuclear Medicine Therapy 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 Thyroid: Procedure Code Group Overview

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

Thyroid Systemic Nuclear Medicine Therapy Procedure Overview

Code Attributes

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

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

Thyroid Systemic Nuclear Medicine Therapy Procedure Overview

Code Attributes

When to Use

ICD-10-PCS Codes

Typical Clinical Scenarios

Related Codes

What procedures are included in the ICD-10-PCS code group CW7G?

Which ICD-10-PCS codes comprise the CW7G group?

What is the primary operation and body part specified by the CW7G code group?

Why is accurate coding within the CW7G group important for inpatient records?

Can CW7G codes be used for non-thyroid systemic nuclear medicine therapies?

References

When to Use

ICD-10-PCS Codes

Typical Clinical Scenarios

Related Codes

What procedures are included in the ICD-10-PCS code group CW7G?

Which ICD-10-PCS codes comprise the CW7G group?

What is the primary operation and body part specified by the CW7G code group?

Why is accurate coding within the CW7G group important for inpatient records?

Can CW7G codes be used for non-thyroid systemic nuclear medicine therapies?

References