ICD-10-PCS Code For Kidneys Ureters And Bladder: Procedure Code Group Overview

The International Classification of Diseases, Tenth Revision, Procedure Coding System (ICD-10-PCS) code group CT63 includes procedures performed to introduce radioactive materials for nonimaging nuclear medicine assays in the kidneys, ureters and bladder. These ICD-10-PCS codes are used for inpatient documentation when a functional renal or urinary system assay using radiopharmaceuticals is performed to evaluate filtration, excretion, or blood elements related to the urinary tract. Accurate coding within the ICD-10-PCS CT63 group is essential for proper inpatient reimbursement, as it captures the specific procedure performed and supports clinical documentation accuracy.

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Kidneys, Ureters And Bladder Nonimaging Nuclear Medicine Assay Procedure Overview

This procedure group includes nonimaging nuclear medicine assays that introduce radioactive materials into the body to study urine formation, renal function, and blood elements associated with the urinary system. These assays target the kidneys, ureters, and bladder to assess function, filtration, and excretory dynamics rather than produce diagnostic images. Accurate ICD-10-PCS coding for these procedures ensures the inpatient record reflects the specific functional study performed and supports appropriate case mix assignment and reimbursement.

Code Attributes

Character	ICD-10-PCS Category	Code Group Details
C	Section	Nuclear Medicine
T	Body System	Urinary System
6	Operation	Nonimaging Nuclear Medicine Assay
3	Body Part	Kidneys, Ureters and Bladder

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ICD-10-PCS Code For Kidneys Ureters And Bladder: Procedure Code Group Overview

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Kidneys, Ureters And Bladder Nonimaging Nuclear Medicine Assay Procedure Overview

Code Attributes

Character	ICD-10-PCS Category	Code Group Details
C	Section	Nuclear Medicine
T	Body System	Urinary System
6	Operation	Nonimaging Nuclear Medicine Assay
3	Body Part	Kidneys, Ureters and Bladder

When to Use

Use codes from this group when a radiopharmaceutical is administered specifically for a nonimaging assay of kidney, ureter, or bladder function during an inpatient stay. These codes apply when the clinical intent is functional evaluation of filtration, excretion, or related blood elements rather than imaging studies.

ICD-10-PCS Codes

5 rows

ICD-10-PCS Code	Description
CT631ZZ	Nonimaging Nuclear Medicine Assay of Kidneys, Ureters and Bladder using Technetium 99m (Tc-99m)
CT63FZZ	Nonimaging Nuclear Medicine Assay of Kidneys, Ureters and Bladder using Iodine 123 (I-123)
CT63GZZ	Nonimaging Nuclear Medicine Assay of Kidneys, Ureters and Bladder using Iodine 131 (I-131)
CT63HZZ	Nonimaging Nuclear Medicine Assay of Kidneys, Ureters and Bladder using Iodine 125 (I-125)
CT63YZZ	Nonimaging Nuclear Medicine Assay of Kidneys, Ureters and Bladder using Other Radionuclide

Typical Clinical Scenarios

An elderly patient hospitalized for acute kidney injury with rapidly rising creatinine and oliguria undergoes a functional renal clearance assay to evaluate differential renal function and quantify glomerular filtration contribution from each kidney when imaging is not required; the inpatient team needs precise functional data to guide fluid management and dialysis timing. Typical codes: CT631ZZ, CT63YZZ
A pediatric inpatient with congenital unilateral renal hypoplasia and recurrent UTIs is admitted for planned evaluation of renal excretory function using a radiopharmaceutical to measure tubular function and urine formation rates; the study is performed as a nonimaging assay to avoid sedation for longer imaging protocols. Typical codes: CT63FZZ, CT631ZZ
A hospitalized patient following pelvic radiation therapy presents with suspected radiation-induced hemorrhagic cystitis causing abnormal urinary blood element levels; clinicians perform a nonimaging nuclear medicine assay to assess renal excretory contribution and urinary blood-element dynamics as part of inpatient diagnostic workup. Typical codes: CT63GZZ, CT63YZZ

Related Codes

CT6Y-URINARY-SYSTEM-NONIMAGING-ASSAY

ICD-10-PCS Code For Urinary 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

5 rows

ICD-10-PCS Code	Description
CT631ZZ	Nonimaging Nuclear Medicine Assay of Kidneys, Ureters and Bladder using Technetium 99m (Tc-99m)
CT63FZZ	Nonimaging Nuclear Medicine Assay of Kidneys, Ureters and Bladder using Iodine 123 (I-123)
CT63GZZ	Nonimaging Nuclear Medicine Assay of Kidneys, Ureters and Bladder using Iodine 131 (I-131)
CT63HZZ	Nonimaging Nuclear Medicine Assay of Kidneys, Ureters and Bladder using Iodine 125 (I-125)
CT63YZZ	Nonimaging Nuclear Medicine Assay of Kidneys, Ureters and Bladder using Other Radionuclide

Typical Clinical Scenarios

An elderly patient hospitalized for acute kidney injury with rapidly rising creatinine and oliguria undergoes a functional renal clearance assay to evaluate differential renal function and quantify glomerular filtration contribution from each kidney when imaging is not required; the inpatient team needs precise functional data to guide fluid management and dialysis timing. Typical codes: CT631ZZ, CT63YZZ
A pediatric inpatient with congenital unilateral renal hypoplasia and recurrent UTIs is admitted for planned evaluation of renal excretory function using a radiopharmaceutical to measure tubular function and urine formation rates; the study is performed as a nonimaging assay to avoid sedation for longer imaging protocols. Typical codes: CT63FZZ, CT631ZZ
A hospitalized patient following pelvic radiation therapy presents with suspected radiation-induced hemorrhagic cystitis causing abnormal urinary blood element levels; clinicians perform a nonimaging nuclear medicine assay to assess renal excretory contribution and urinary blood-element dynamics as part of inpatient diagnostic workup. Typical codes: CT63GZZ, CT63YZZ

Related Codes

CT6Y-URINARY-SYSTEM-NONIMAGING-ASSAY

ICD-10-PCS Code For Urinary 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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ICD-10-PCS Code For Kidneys Ureters And Bladder: Procedure Code Group Overview

Sign up for ICD-10-PCS Code For Kidneys Ureters And Bladder: Procedure Code Group Overview policy alerts

Kidneys, Ureters And Bladder Nonimaging Nuclear Medicine Assay Procedure Overview

Code Attributes

ICD-10-PCS Code For Kidneys Ureters And Bladder: Procedure Code Group Overview

Sign up for ICD-10-PCS Code For Kidneys Ureters And Bladder: Procedure Code Group Overview policy alerts

Kidneys, Ureters And Bladder Nonimaging Nuclear Medicine Assay 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 CT63?

What is the purpose of using radiopharmaceuticals in CT63 procedures?

How does accurate ICD-10-PCS coding for CT63 affect inpatient reimbursement?

What are the specific ICD-10-PCS codes in the CT63 group and their radionuclides?

Under which ICD-10-PCS section and body system are CT63 procedures categorized?

References

When to Use

ICD-10-PCS Codes

Typical Clinical Scenarios

Related Codes

Which procedures are included in the ICD-10-PCS code group CT63?

What is the purpose of using radiopharmaceuticals in CT63 procedures?

How does accurate ICD-10-PCS coding for CT63 affect inpatient reimbursement?

What are the specific ICD-10-PCS codes in the CT63 group and their radionuclides?

Under which ICD-10-PCS section and body system are CT63 procedures categorized?

References