ICD-10-PCS Code For None: Procedure Code Group Overview

The International Classification of Diseases, Tenth Revision, Procedure Coding System (ICD-10-PCS) code group 6A3Z includes procedures performed to raise body temperature using extracorporeal or systemic hyperthermia techniques. These ICD-10-PCS codes are used for inpatient documentation when a patient receives extracorporeal or systemic thermal therapy to elevate core body temperature for therapeutic purposes. Accurate coding within the ICD-10-PCS 6A3Z group is essential for proper inpatient reimbursement, as it captures the specific hyperthermia procedure performed and determines appropriate case mix and payment.

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None Hyperthermia Procedure Overview

Procedures in this group involve extracorporeal or systemic hyperthermia therapies that raise the patient’s body temperature using external circulation or whole-body thermal techniques. These treatments do not target an anatomical body system but instead modify a physiological parameter—core body temperature—through extracorporeal methods. Accurate coding of these procedures is important for inpatient reimbursement because it documents the specific therapy performed and supports appropriate case mix and payment determination.

Code Attributes

Character	ICD-10-PCS Category	Code Group Details
6	Section	Extracorporeal or Systemic Therapies
A	Body System	Physiological Systems
3	Operation	Hyperthermia
Z	Body Part	None

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ICD-10-PCS Code For None: Procedure Code Group Overview

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None Hyperthermia Procedure Overview

Code Attributes

Character	ICD-10-PCS Category	Code Group Details
6	Section	Extracorporeal or Systemic Therapies
A	Body System	Physiological Systems
3	Operation	Hyperthermia
Z	Body Part	None

When to Use

Use a code from this group when a patient undergoes extracorporeal or systemic hyperthermia as the primary procedure performed during the inpatient encounter. These codes apply when the therapy involves raising core body temperature via extracorporeal or systemic methods rather than a localized anatomic intervention.

ICD-10-PCS Codes

2 rows

ICD-10-PCS Code	Description
6A3Z0ZZ	Hyperthermia, Single
6A3Z1ZZ	Hyperthermia, Multiple

Typical Clinical Scenarios

An elderly patient is admitted with severe accidental hypothermia after prolonged exposure to cold outdoors. Core rewarming is required in the inpatient setting because external warming measures failed and the patient has hemodynamic instability; extracorporeal systemic thermal therapy is used to raise core body temperature in a controlled manner. The procedure is performed once during this admission for initial rewarming. Typical codes: 6A3Z0ZZ
A middle-aged oncology patient is admitted electively to receive whole-body hyperthermia as part of an adjunctive treatment protocol to enhance chemotherapy effectiveness. The planned inpatient therapy involves scheduled systemic hyperthermia delivered over multiple sessions during the hospital stay to maintain elevated core temperature for therapeutic effect. Typical codes: 6A3Z1ZZ
A postoperative patient develops persistent hypothermia unresponsive to standard warming blankets and forced-air warming. The clinical team initiates repeated extracorporeal systemic hyperthermia sessions to restore and maintain normothermia and prevent complications related to prolonged low core temperature during recovery. Typical codes: 6A3Z1ZZ

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
6A3Z0ZZ	Hyperthermia, Single
6A3Z1ZZ	Hyperthermia, Multiple

Typical Clinical Scenarios

An elderly patient is admitted with severe accidental hypothermia after prolonged exposure to cold outdoors. Core rewarming is required in the inpatient setting because external warming measures failed and the patient has hemodynamic instability; extracorporeal systemic thermal therapy is used to raise core body temperature in a controlled manner. The procedure is performed once during this admission for initial rewarming. Typical codes: 6A3Z0ZZ
A middle-aged oncology patient is admitted electively to receive whole-body hyperthermia as part of an adjunctive treatment protocol to enhance chemotherapy effectiveness. The planned inpatient therapy involves scheduled systemic hyperthermia delivered over multiple sessions during the hospital stay to maintain elevated core temperature for therapeutic effect. Typical codes: 6A3Z1ZZ
A postoperative patient develops persistent hypothermia unresponsive to standard warming blankets and forced-air warming. The clinical team initiates repeated extracorporeal systemic hyperthermia sessions to restore and maintain normothermia and prevent complications related to prolonged low core temperature during recovery. Typical codes: 6A3Z1ZZ

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 None: Procedure Code Group Overview

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None Hyperthermia Procedure Overview

Code Attributes

ICD-10-PCS Code For None: Procedure Code Group Overview

Sign up for ICD-10-PCS Code For None: Procedure Code Group Overview policy alerts

None Hyperthermia Procedure Overview

Code Attributes

When to Use

ICD-10-PCS Codes

Typical Clinical Scenarios

What types of procedures are included in ICD-10-PCS code group 6A3Z?

What is the section, body system, and operation attributes for these codes?

Which specific ICD-10-PCS codes are in this group and how do they differ?

Why is accurate coding within the 6A3Z group important for inpatient care?

Are there related DRGs listed for ICD-10-PCS group 6A3Z?

References

When to Use

ICD-10-PCS Codes

Typical Clinical Scenarios

What types of procedures are included in ICD-10-PCS code group 6A3Z?

What is the section, body system, and operation attributes for these codes?

Which specific ICD-10-PCS codes are in this group and how do they differ?

Why is accurate coding within the 6A3Z group important for inpatient care?

Are there related DRGs listed for ICD-10-PCS group 6A3Z?

References