ICD-10-PCS Code For Endocrine System: Procedure Code Group Overview

The International Classification of Diseases, Tenth Revision, Procedure Coding System (ICD-10-PCS) code group CG2Y includes procedures performed to image endocrine system structures using tomographic nuclear medicine techniques. These ICD-10-PCS codes are used for inpatient documentation when three-dimensional radionuclide imaging of endocrine organs is performed to evaluate function or detect pathology. Accurate coding within the ICD-10-PCS CG2Y group is essential for proper inpatient reimbursement, as it captures the specific imaging procedure performed and supports clinical documentation accuracy.

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Endocrine System Tomographic Nuclear Medicine Imaging Procedure Overview

Procedures in this group involve tomographic nuclear medicine imaging techniques applied to the endocrine system, using radionuclide tracers to create three-dimensional images from captured radioactive emissions. These studies target endocrine organs such as the thyroid, parathyroids, adrenal glands, and other hormone-producing tissues to assess function and detect focal or diffuse abnormalities. Accurate ICD-10-PCS coding of these inpatient procedures ensures clinical documentation aligns with the procedure performed and supports appropriate case mix assignment and reimbursement.

Code Attributes

Character	ICD-10-PCS Category	Code Group Details
C	Section	Nuclear Medicine
G	Body System	Endocrine System
2	Operation	Tomographic (Tomo) Nuclear Medicine Imaging
Y	Body Part	Endocrine System

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ICD-10-PCS Code For Endocrine System: Procedure Code Group Overview

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Endocrine System Tomographic Nuclear Medicine Imaging Procedure Overview

Code Attributes

Character	ICD-10-PCS Category	Code Group Details
C	Section	Nuclear Medicine
G	Body System	Endocrine System
2	Operation	Tomographic (Tomo) Nuclear Medicine Imaging
Y	Body Part	Endocrine System

When to Use

Use a code from this group when inpatient tomographic nuclear medicine imaging is performed to evaluate endocrine organ function or to localize endocrine pathology using radionuclide tracers. Select the specific code when the procedure involves three-dimensional image acquisition and the body system is the endocrine system.

ICD-10-PCS Codes

1 rows

ICD-10-PCS Code	Description
CG2YYZZ	Tomographic (Tomo) Nuclear Medicine Imaging of Endocrine System using Other Radionuclide

Typical Clinical Scenarios

A hospitalized elderly patient with a known multinodular goiter is admitted for evaluation after progressive dysphagia and new hoarseness; clinicians suspect a dominant hyperfunctioning thyroid nodule requiring localization before possible inpatient therapeutic planning. Tomographic nuclear medicine imaging of the endocrine system is performed using a nonstandard/other radionuclide tracer to create 3D functional images of the thyroid and surrounding structures to identify focal uptake and guide management. Typical codes: CG2YYZZ
A middle-aged patient presents to the emergency department with severe hypertension, episodic headaches, and diaphoresis; after admission for blood pressure control and biochemical testing suggestive of catecholamine-secreting adrenal tumor, tomographic nuclear medicine imaging is ordered to localize adrenal lesions using an alternative radionuclide tracer when standard agents are contraindicated. The 3D tomographic study images adrenal gland function and focal uptake to assist surgical planning during the inpatient stay. Typical codes: CG2YYZZ
A postoperative inpatient develops recurrent hypercalcemia after prior parathyroid surgery and persistent biochemical evidence of hyperparathyroidism; clinicians need precise localization of ectopic or residual parathyroid tissue using tomographic radionuclide imaging with an other radionuclide tracer to guide possible re-exploration. The study provides three-dimensional functional localization of endocrine tissue within the neck or mediastinum while the patient remains hospitalized. Typical codes: CG2YYZZ

ICD-10-PCS Code For Parathyroid Glands: 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

1 rows

ICD-10-PCS Code	Description
CG2YYZZ	Tomographic (Tomo) Nuclear Medicine Imaging of Endocrine System using Other Radionuclide

Typical Clinical Scenarios

A hospitalized elderly patient with a known multinodular goiter is admitted for evaluation after progressive dysphagia and new hoarseness; clinicians suspect a dominant hyperfunctioning thyroid nodule requiring localization before possible inpatient therapeutic planning. Tomographic nuclear medicine imaging of the endocrine system is performed using a nonstandard/other radionuclide tracer to create 3D functional images of the thyroid and surrounding structures to identify focal uptake and guide management. Typical codes: CG2YYZZ
A middle-aged patient presents to the emergency department with severe hypertension, episodic headaches, and diaphoresis; after admission for blood pressure control and biochemical testing suggestive of catecholamine-secreting adrenal tumor, tomographic nuclear medicine imaging is ordered to localize adrenal lesions using an alternative radionuclide tracer when standard agents are contraindicated. The 3D tomographic study images adrenal gland function and focal uptake to assist surgical planning during the inpatient stay. Typical codes: CG2YYZZ
A postoperative inpatient develops recurrent hypercalcemia after prior parathyroid surgery and persistent biochemical evidence of hyperparathyroidism; clinicians need precise localization of ectopic or residual parathyroid tissue using tomographic radionuclide imaging with an other radionuclide tracer to guide possible re-exploration. The study provides three-dimensional functional localization of endocrine tissue within the neck or mediastinum while the patient remains hospitalized. Typical codes: CG2YYZZ

ICD-10-PCS Code For Parathyroid Glands: 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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ICD-10-PCS Code For Endocrine System: Procedure Code Group Overview

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Endocrine System Tomographic Nuclear Medicine Imaging Procedure Overview

Code Attributes

OpenPayer

ICD-10-PCS Code For Endocrine System: Procedure Code Group Overview

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Endocrine System Tomographic Nuclear Medicine Imaging 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 Endocrine System: Procedure Code Group Overview

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

Endocrine System Tomographic Nuclear Medicine Imaging Procedure Overview

Code Attributes

ICD-10-PCS Code For Endocrine System: Procedure Code Group Overview

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

Endocrine System Tomographic Nuclear Medicine Imaging Procedure Overview

Code Attributes

When to Use

ICD-10-PCS Codes

Typical Clinical Scenarios

Related Codes

Which ICD-10-PCS code group covers tomographic nuclear medicine imaging of the endocrine system?

What procedures are represented within the `CG2YYZZ` code listing?

For which clinical purposes are CG2Y group procedures performed?

In what coding context should `CG2YYZZ` be used in inpatient documentation?

What are the section and attributes associated with the CG2Y code group?

References

When to Use

ICD-10-PCS Codes

Typical Clinical Scenarios

Related Codes

Which ICD-10-PCS code group covers tomographic nuclear medicine imaging of the endocrine system?

What procedures are represented within the `CG2YYZZ` code listing?

For which clinical purposes are CG2Y group procedures performed?

In what coding context should `CG2YYZZ` be used in inpatient documentation?

What are the section and attributes associated with the CG2Y code group?

References