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

The International Classification of Diseases, Tenth Revision, Procedure Coding System (ICD-10-PCS) code group CG11 includes procedures performed to image parathyroid gland structure and function using planar nuclear medicine techniques. These ICD-10-PCS codes are used for inpatient documentation when radioactive tracers are introduced to obtain single-plane imaging of the parathyroid glands for diagnostic evaluation. Accurate coding within the ICD-10-PCS CG11 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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Parathyroid Glands Planar Nuclear Medicine Imaging Procedure Overview

This procedure group includes planar nuclear medicine imaging studies that target the parathyroid glands within the endocrine system. These procedures involve introduction of radioactive materials into the body and capture of emitted radiation to develop single-plane images of parathyroid anatomy and function. Accurate ICD-10-PCS coding of these studies supports correct inpatient reimbursement and ensures the clinical record reflects the diagnostic nuclear medicine service provided.

Code Attributes

Character	ICD-10-PCS Category	Code Group Details
C	Section	Nuclear Medicine
G	Body System	Endocrine System
1	Operation	Planar Nuclear Medicine Imaging
1	Body Part	Parathyroid Glands

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

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Parathyroid Glands Planar Nuclear Medicine Imaging Procedure Overview

Code Attributes

Character	ICD-10-PCS Category	Code Group Details
C	Section	Nuclear Medicine
G	Body System	Endocrine System
1	Operation	Planar Nuclear Medicine Imaging
1	Body Part	Parathyroid Glands

When to Use

Use a code from this group when radioactive tracers are administered for planar imaging aimed at diagnosing parathyroid disease or localizing hyperfunctioning parathyroid tissue. These codes apply when the imaging is performed in an inpatient setting and the procedure involves capture of radioactive emissions to create single-plane images.

ICD-10-PCS Codes

3 rows

ICD-10-PCS Code	Description
CG111ZZ	Planar Nuclear Medicine Imaging of Parathyroid Glands using Technetium 99m (Tc-99m)
CG11SZZ	Planar Nuclear Medicine Imaging of Parathyroid Glands using Thallium 201 (Tl-201)
CG11YZZ	Planar Nuclear Medicine Imaging of Parathyroid Glands using Other Radionuclide

Typical Clinical Scenarios

A 68-year-old patient is admitted with recurrent severe hypercalcemia and confusion after long-standing primary hyperparathyroidism; inpatient evaluation is required to localize hyperfunctioning parathyroid tissue prior to urgent surgical planning. A planar nuclear medicine study is performed with a technetium-based tracer to image parathyroid anatomy and identify focal uptake correlating with an adenoma. Typical codes: CG111ZZ
A 45-year-old outpatient with persistently elevated parathyroid hormone levels is observed to have worsening symptoms and is admitted electively for preoperative localization of suspected multigland disease. A single-plane nuclear medicine imaging study using thallium is obtained during the inpatient stay to assess parathyroid gland function and guide the surgical approach. Typical codes: CG11SZZ
A 58-year-old patient presents postoperatively with persistent hypercalcemia after prior neck surgery; localization of residual or ectopic parathyroid tissue is needed during an inpatient workup for reoperation. An inpatient planar nuclear medicine scan using a non-routine radionuclide is performed to detect residual functioning parathyroid tissue. Typical codes: CG11YZZ

Related Codes

CG12-THYROID-GLAND-IMAGING

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

CG14-ADRENAL-GLANDS-PLANAR-IMAGING

ICD-10-PCS Code For Adrenal Glands Bilateral: Procedure Code Group Overview

CG1Y-ENDOCRINE-SYSTEM-IMAGING

ICD-10-PCS Code For Endocrine System: 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
CG111ZZ	Planar Nuclear Medicine Imaging of Parathyroid Glands using Technetium 99m (Tc-99m)
CG11SZZ	Planar Nuclear Medicine Imaging of Parathyroid Glands using Thallium 201 (Tl-201)
CG11YZZ	Planar Nuclear Medicine Imaging of Parathyroid Glands using Other Radionuclide

Typical Clinical Scenarios

A 68-year-old patient is admitted with recurrent severe hypercalcemia and confusion after long-standing primary hyperparathyroidism; inpatient evaluation is required to localize hyperfunctioning parathyroid tissue prior to urgent surgical planning. A planar nuclear medicine study is performed with a technetium-based tracer to image parathyroid anatomy and identify focal uptake correlating with an adenoma. Typical codes: CG111ZZ
A 45-year-old outpatient with persistently elevated parathyroid hormone levels is observed to have worsening symptoms and is admitted electively for preoperative localization of suspected multigland disease. A single-plane nuclear medicine imaging study using thallium is obtained during the inpatient stay to assess parathyroid gland function and guide the surgical approach. Typical codes: CG11SZZ
A 58-year-old patient presents postoperatively with persistent hypercalcemia after prior neck surgery; localization of residual or ectopic parathyroid tissue is needed during an inpatient workup for reoperation. An inpatient planar nuclear medicine scan using a non-routine radionuclide is performed to detect residual functioning parathyroid tissue. Typical codes: CG11YZZ

Related Codes

CG12-THYROID-GLAND-IMAGING

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

CG14-ADRENAL-GLANDS-PLANAR-IMAGING

ICD-10-PCS Code For Adrenal Glands Bilateral: Procedure Code Group Overview

CG1Y-ENDOCRINE-SYSTEM-IMAGING

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

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

Parathyroid Glands Planar Nuclear Medicine Imaging Procedure Overview

Code Attributes

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

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

Parathyroid Glands Planar Nuclear Medicine Imaging 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 CG11 group?

What is the primary operation and body system defined for CG11 codes?

How do CG11 codes support inpatient reimbursement?

What radionuclide options are represented by individual CG11 codes?

When should a coder select a CG11 code for documentation?

References

When to Use

ICD-10-PCS Codes

Typical Clinical Scenarios

Related Codes

Which procedures are included in the ICD-10-PCS CG11 group?

What is the primary operation and body system defined for CG11 codes?

How do CG11 codes support inpatient reimbursement?

What radionuclide options are represented by individual CG11 codes?

When should a coder select a CG11 code for documentation?

References