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

The International Classification of Diseases, Tenth Revision, Procedure Coding System (ICD-10-PCS) code group 07HM includes procedures performed to insert nonbiological appliances that monitor, assist, perform, or prevent physiological functions in the thymus. These ICD-10-PCS codes are used for inpatient documentation when a device is placed into the thymus to support or regulate immune-related physiological activity or to provide monitoring of thymic function. Accurate coding within the ICD-10-PCS 07HM group is essential for proper inpatient reimbursement, as it captures the procedure performed and determines appropriate case mix and payment.

Customize your policy alerts

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

Get alerted when relevant policies change without checking for updates manually.

Monitor payer policy activity

Receive email alerts as soon as relevant payer policies are published or updated.

Thymus Insertion Procedure Overview

This group includes procedures that involve placement of nonbiological appliances into the thymus within the lymphatic and hemic systems to monitor, assist, perform, or prevent physiological functions. These insertion procedures target the thymus and are coded in the Medical and Surgical section of the International Classification of Diseases, 10th Revision, Procedure Coding System. Accurate coding ensures inpatient records reflect the specific device placement and supports correct case mix and payment.

Code Attributes

Character	ICD-10-PCS Category	Code Group Details
0	Section	Medical and Surgical
7	Body System	Lymphatic and Hemic Systems
H	Operation	Insertion
M	Body Part	Thymus

Explore openpayer tools

View all tools

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

Customize your policy alerts

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

Get alerted when relevant policies change without checking for updates manually.

Monitor payer policy activity

Receive email alerts as soon as relevant payer policies are published or updated.

Thymus Insertion Procedure Overview

Code Attributes

Character	ICD-10-PCS Category	Code Group Details
0	Section	Medical and Surgical
7	Body System	Lymphatic and Hemic Systems
H	Operation	Insertion
M	Body Part	Thymus

When to Use

Use a code from this group when a nonbiological device is placed into the thymus during an inpatient encounter to provide monitoring, support, or intervention for thymic function. These codes apply when the procedure performed is insertion, as defined in the Medical and Surgical section of ICD-10-PCS.

ICD-10-PCS Codes

9 rows

ICD-10-PCS Code	Description
07HM01Z	Insertion of Radioactive Element into Thymus, Open Approach
07HM03Z	Insertion of Infusion Device into Thymus, Open Approach
07HM0YZ	Insertion of Other Device into Thymus, Open Approach
07HM31Z	Insertion of Radioactive Element into Thymus, Percutaneous Approach
07HM33Z	Insertion of Infusion Device into Thymus, Percutaneous Approach
07HM3YZ	Insertion of Other Device into Thymus, Percutaneous Approach
07HM41Z	Insertion of Radioactive Element into Thymus, Percutaneous Endoscopic Approach
07HM43Z	Insertion of Infusion Device into Thymus, Percutaneous Endoscopic Approach
07HM4YZ	Insertion of Other Device into Thymus, Percutaneous Endoscopic Approach

DRG Codes

21 rows

DRG Code	Description
163	Major Chest Procedures with MCC
164	Major Chest Procedures with CC
165	Major Chest Procedures without CC/MCC
628	Other Endocrine, Nutritional and Metabolic O.R. Procedures with MCC
629	Other Endocrine, Nutritional and Metabolic O.R. Procedures with CC
630	Other Endocrine, Nutritional and Metabolic O.R. Procedures without CC/MCC
802	Other O.R. Procedures of the Blood and Blood Forming Organs with MCC
803	Other O.R. Procedures of the Blood and Blood Forming Organs with CC
804	Other O.R. Procedures of the Blood and Blood Forming Organs without CC/MCC
820	Lymphoma and Leukemia with Major O.R. Procedures with MCC

Showing 1–10 of 21

Typical Clinical Scenarios

An adult patient with refractory myasthenia gravis who has failed medical therapy is admitted for a planned surgical implantation of an infusion device into the thymus to deliver targeted immunomodulatory therapy and monitor local drug dispersion; inpatient admission is for the operative procedure and post‑op observation due to potential respiratory compromise. Typical codes: 07HM03Z
A pediatric patient with congenital T‑cell immunodeficiency undergoes elective percutaneous placement of a small monitoring device into the thymus to assess thymic output and guide subsequent immune‑reconstitution therapy; admission is for device placement and short postoperative monitoring. Typical codes: 07HM31Z
An adult with prior thoracic surgery develops a symptomatic thymic cyst causing recurrent infections; during an urgent open procedure to address the lesion, the surgeon inserts a nonbiological device into the thymus to prevent recurrence and provide local therapy monitoring, necessitating inpatient care for complication risk and wound management. Typical codes: 07HM01Z, 07HM0YZ

Related Codes

07HK-THORACIC-DUCT-INSERTION

ICD-10-PCS Code for Thoracic Duct: Procedure Code Group Overview

07HL-CISTERNA-CHYLI-INSERTION

ICD-10-PCS Code for Cisterna Chyli: Procedure Code Group Overview

07HN-LYMPHATIC-INSERTION

ICD-10-PCS Code for Lymphatic: Procedure Code Group Overview

07HP-SPLEEN-INSERTION

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

07HT-BONE-MARROW-INSERTION

ICD-10-PCS Code For Bone Marrow: 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.

Trek Health ingests and normalizes Transparency in Coverage data and payer policy updates to give provider organizations a clear view of how commercial reimbursement behaves across markets, payers, and services. Our platform transforms raw payer disclosures into structured intelligence that supports contract evaluation, payer negotiations, and service line strategy. By combining market benchmarks with ongoing policy visibility, Trek helps teams identify variability, risk, and opportunity in commercial reimbursement. The result is faster insight, stronger negotiating positions, and more informed financial decisions.

Explore openpayer tools

View all tools

When to Use

ICD-10-PCS Codes

9 rows

ICD-10-PCS Code	Description
07HM01Z	Insertion of Radioactive Element into Thymus, Open Approach
07HM03Z	Insertion of Infusion Device into Thymus, Open Approach
07HM0YZ	Insertion of Other Device into Thymus, Open Approach
07HM31Z	Insertion of Radioactive Element into Thymus, Percutaneous Approach
07HM33Z	Insertion of Infusion Device into Thymus, Percutaneous Approach
07HM3YZ	Insertion of Other Device into Thymus, Percutaneous Approach
07HM41Z	Insertion of Radioactive Element into Thymus, Percutaneous Endoscopic Approach
07HM43Z	Insertion of Infusion Device into Thymus, Percutaneous Endoscopic Approach
07HM4YZ	Insertion of Other Device into Thymus, Percutaneous Endoscopic Approach

DRG Codes

21 rows

DRG Code	Description
163	Major Chest Procedures with MCC
164	Major Chest Procedures with CC
165	Major Chest Procedures without CC/MCC
628	Other Endocrine, Nutritional and Metabolic O.R. Procedures with MCC
629	Other Endocrine, Nutritional and Metabolic O.R. Procedures with CC
630	Other Endocrine, Nutritional and Metabolic O.R. Procedures without CC/MCC
802	Other O.R. Procedures of the Blood and Blood Forming Organs with MCC
803	Other O.R. Procedures of the Blood and Blood Forming Organs with CC
804	Other O.R. Procedures of the Blood and Blood Forming Organs without CC/MCC
820	Lymphoma and Leukemia with Major O.R. Procedures with MCC

Showing 1–10 of 21

Typical Clinical Scenarios

An adult patient with refractory myasthenia gravis who has failed medical therapy is admitted for a planned surgical implantation of an infusion device into the thymus to deliver targeted immunomodulatory therapy and monitor local drug dispersion; inpatient admission is for the operative procedure and post‑op observation due to potential respiratory compromise. Typical codes: 07HM03Z
A pediatric patient with congenital T‑cell immunodeficiency undergoes elective percutaneous placement of a small monitoring device into the thymus to assess thymic output and guide subsequent immune‑reconstitution therapy; admission is for device placement and short postoperative monitoring. Typical codes: 07HM31Z
An adult with prior thoracic surgery develops a symptomatic thymic cyst causing recurrent infections; during an urgent open procedure to address the lesion, the surgeon inserts a nonbiological device into the thymus to prevent recurrence and provide local therapy monitoring, necessitating inpatient care for complication risk and wound management. Typical codes: 07HM01Z, 07HM0YZ

Related Codes

07HK-THORACIC-DUCT-INSERTION

ICD-10-PCS Code for Thoracic Duct: Procedure Code Group Overview

07HL-CISTERNA-CHYLI-INSERTION

ICD-10-PCS Code for Cisterna Chyli: Procedure Code Group Overview

07HN-LYMPHATIC-INSERTION

ICD-10-PCS Code for Lymphatic: Procedure Code Group Overview

07HP-SPLEEN-INSERTION

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

07HT-BONE-MARROW-INSERTION

ICD-10-PCS Code For Bone Marrow: 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 Thymus: Procedure Code Group Overview

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

Thymus Insertion Procedure Overview

Code Attributes

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

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

Thymus Insertion Procedure Overview

Code Attributes

When to Use

ICD-10-PCS Codes

DRG Codes

Typical Clinical Scenarios

Related Codes

Which ICD-10-PCS section and body system cover thymus appliance placement procedures?

What device types and approaches are captured in the 07HM code group?

How does accurate coding within the 07HM group affect inpatient reimbursement?

Which specific ICD-10-PCS codes represent insertion of infusion devices into the thymus?

What DRG categories may be related to procedures coded in the 07HM group?

References

When to Use

ICD-10-PCS Codes

DRG Codes

Typical Clinical Scenarios

Related Codes

Which ICD-10-PCS section and body system cover thymus appliance placement procedures?

What device types and approaches are captured in the 07HM code group?

How does accurate coding within the 07HM group affect inpatient reimbursement?

Which specific ICD-10-PCS codes represent insertion of infusion devices into the thymus?

What DRG categories may be related to procedures coded in the 07HM group?

References