ICD-10-PCS Code For Occipital Bone: Procedure Code Group Overview

The International Classification of Diseases, Tenth Revision, Procedure Coding System (ICD-10-PCS) code group 0N97 includes procedures performed to drain fluids or gases from structures in the occipital bone. These ICD-10-PCS codes are used for inpatient documentation when a clinician removes accumulated fluid or gas from the occipital bone to treat infection, hematoma, or other pathological collections. Accurate coding within the ICD-10-PCS 0N97 group is essential for proper inpatient reimbursement, as it captures the specific drainage procedure performed and supports clinical documentation accuracy.

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Occipital Bone Drainage Procedure Overview

This procedure group includes drainage operations performed on the occipital bone within the head and facial bones body system. These procedures involve taking or letting out fluids and/or gases from the occipital bone to treat infection, hematoma, or other fluid collections. Accurate coding is important because it ensures inpatient records reflect the specific drainage procedure performed and supports appropriate reimbursement.

Code Attributes

Character	ICD-10-PCS Category	Code Group Details
0	Section	Medical and Surgical
N	Body System	Head and Facial Bones
9	Operation	Drainage
7	Body Part	Occipital Bone

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ICD-10-PCS Code For Occipital Bone: Procedure Code Group Overview

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Occipital Bone Drainage Procedure Overview

Code Attributes

Character	ICD-10-PCS Category	Code Group Details
0	Section	Medical and Surgical
N	Body System	Head and Facial Bones
9	Operation	Drainage
7	Body Part	Occipital Bone

When to Use

Use a code from this group when a clinician performs a drainage procedure targeting the occipital bone to evacuate fluid or gas collections. These codes apply when the procedure is performed in the inpatient setting and documented as drainage of the occipital bone.

ICD-10-PCS Codes

9 rows

ICD-10-PCS Code	Description
0N9700Z	Drainage of Occipital Bone with Drainage Device, Open Approach
0N970ZX	Drainage of Occipital Bone, Open Approach, Diagnostic
0N970ZZ	Drainage of Occipital Bone, Open Approach
0N9730Z	Drainage of Occipital Bone with Drainage Device, Percutaneous Approach
0N973ZX	Drainage of Occipital Bone, Percutaneous Approach, Diagnostic
0N973ZZ	Drainage of Occipital Bone, Percutaneous Approach
0N9740Z	Drainage of Occipital Bone with Drainage Device, Percutaneous Endoscopic Approach
0N974ZX	Drainage of Occipital Bone, Percutaneous Endoscopic Approach, Diagnostic
0N974ZZ	Drainage of Occipital Bone, Percutaneous Endoscopic Approach

DRG Codes

12 rows

DRG Code	Description
023	Craniotomy with Major Device Implant or Acute Complex CNS Principal Diagnosis with MCC or Antineoplastic Implant or Epilepsy with Neurostimulator
024	Craniotomy with Major Device Implant or Acute Complex CNS Principal Diagnosis without MCC
025	Craniotomy and Endovascular Intracranial Procedures with MCC
026	Craniotomy and Endovascular Intracranial Procedures with CC
027	Craniotomy and Endovascular Intracranial Procedures without CC/MCC
477	Biopsies of Musculoskeletal System and Connective Tissue with MCC
478	Biopsies of Musculoskeletal System and Connective Tissue with CC
479	Biopsies of Musculoskeletal System and Connective Tissue 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

Showing 1–10 of 12

Typical Clinical Scenarios

An adult patient presents to the emergency department after a penetrating scalp injury over the posterior skull with expanding subperiosteal fluid collection and signs of infection (fever, localized tenderness, erythema). Imaging confirms a localized abscess involving the occipital bone that requires operative evacuation and placement of a drain to control ongoing purulent drainage. An open surgical approach is performed to drain the collection and place a drainage device for postoperative management. Typical codes: 0N9700Z
A middle-aged patient with a history of chronic otogenic osteomyelitis develops a persistent occult fluid cavity within the occipital bone identified on CT and MRI. After multidisciplinary planning, a scheduled percutaneous drainage under image guidance is performed to evacuate the chronic collection and obtain cultures, using a drain to allow continued postoperative drainage and local therapy. Typical codes: 0N9730Z
A patient previously managed conservatively for an occipital bone hematoma returns with recurrent pain and new fluctuance after initial needle aspiration failed to resolve the collection. A percutaneous endoscopic drainage is performed to inspect the cavity, evacuate residual blood and debris, and complete drainage when prior attempts were inadequate or the collection recurred. Typical codes: 0N974ZX, 0N974ZZ

Related Codes

0N90-SKULL-DRAINAGE

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

0N91-FRONTAL-BONE-DRAINAGE

ICD-10-PCS Code For Frontal Bone: Procedure Code Group Overview

0N93-PARIETAL-BONE-DRAINAGE

ICD-10-PCS Code For Parietal Bone Right: Procedure Code Group Overview

0N94-LEFT-PARIETAL-BONE-DRAINAGE

ICD-10-PCS Code For Parietal Bone, Left: Procedure Code Group Overview

0N95-TEMPORAL-BONE-RIGHT-DRAINAGE

ICD-10-PCS Code For Temporal Bone, Right: Procedure Code Group Overview

0N96-TEMPORAL-BONE-DRAINAGE

ICD-10-PCS Code For Temporal Bone Left: Procedure Code Group Overview

0N9B-NASAL-BONE-DRAINAGE

ICD-10-PCS Code For Nasal Bone: Procedure Code Group Overview

0N9C-SPHENOID-BONE-DRAINAGE

ICD-10-PCS Code For Sphenoid Bone: Procedure Code Group Overview

0N9F-ETHMOID-BONE-RIGHT-DRAINAGE

ICD-10-PCS Code For Ethmoid Bone Right: Procedure Code Group Overview

0N9G-ETHMOID-BONE-LEFT-DRAINAGE

ICD-10-PCS Code For Ethmoid Bone, Left: Procedure Code Group Overview

Showing 1–10 of 22

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

9 rows

ICD-10-PCS Code	Description
0N9700Z	Drainage of Occipital Bone with Drainage Device, Open Approach
0N970ZX	Drainage of Occipital Bone, Open Approach, Diagnostic
0N970ZZ	Drainage of Occipital Bone, Open Approach
0N9730Z	Drainage of Occipital Bone with Drainage Device, Percutaneous Approach
0N973ZX	Drainage of Occipital Bone, Percutaneous Approach, Diagnostic
0N973ZZ	Drainage of Occipital Bone, Percutaneous Approach
0N9740Z	Drainage of Occipital Bone with Drainage Device, Percutaneous Endoscopic Approach
0N974ZX	Drainage of Occipital Bone, Percutaneous Endoscopic Approach, Diagnostic
0N974ZZ	Drainage of Occipital Bone, Percutaneous Endoscopic Approach

DRG Codes

12 rows

DRG Code	Description
023	Craniotomy with Major Device Implant or Acute Complex CNS Principal Diagnosis with MCC or Antineoplastic Implant or Epilepsy with Neurostimulator
024	Craniotomy with Major Device Implant or Acute Complex CNS Principal Diagnosis without MCC
025	Craniotomy and Endovascular Intracranial Procedures with MCC
026	Craniotomy and Endovascular Intracranial Procedures with CC
027	Craniotomy and Endovascular Intracranial Procedures without CC/MCC
477	Biopsies of Musculoskeletal System and Connective Tissue with MCC
478	Biopsies of Musculoskeletal System and Connective Tissue with CC
479	Biopsies of Musculoskeletal System and Connective Tissue 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

Showing 1–10 of 12

Typical Clinical Scenarios

An adult patient presents to the emergency department after a penetrating scalp injury over the posterior skull with expanding subperiosteal fluid collection and signs of infection (fever, localized tenderness, erythema). Imaging confirms a localized abscess involving the occipital bone that requires operative evacuation and placement of a drain to control ongoing purulent drainage. An open surgical approach is performed to drain the collection and place a drainage device for postoperative management. Typical codes: 0N9700Z
A middle-aged patient with a history of chronic otogenic osteomyelitis develops a persistent occult fluid cavity within the occipital bone identified on CT and MRI. After multidisciplinary planning, a scheduled percutaneous drainage under image guidance is performed to evacuate the chronic collection and obtain cultures, using a drain to allow continued postoperative drainage and local therapy. Typical codes: 0N9730Z
A patient previously managed conservatively for an occipital bone hematoma returns with recurrent pain and new fluctuance after initial needle aspiration failed to resolve the collection. A percutaneous endoscopic drainage is performed to inspect the cavity, evacuate residual blood and debris, and complete drainage when prior attempts were inadequate or the collection recurred. Typical codes: 0N974ZX, 0N974ZZ

Related Codes

0N90-SKULL-DRAINAGE

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

0N91-FRONTAL-BONE-DRAINAGE

ICD-10-PCS Code For Frontal Bone: Procedure Code Group Overview

0N93-PARIETAL-BONE-DRAINAGE

ICD-10-PCS Code For Parietal Bone Right: Procedure Code Group Overview

0N94-LEFT-PARIETAL-BONE-DRAINAGE

ICD-10-PCS Code For Parietal Bone, Left: Procedure Code Group Overview

0N95-TEMPORAL-BONE-RIGHT-DRAINAGE

ICD-10-PCS Code For Temporal Bone, Right: Procedure Code Group Overview

0N96-TEMPORAL-BONE-DRAINAGE

ICD-10-PCS Code For Temporal Bone Left: Procedure Code Group Overview

0N9B-NASAL-BONE-DRAINAGE

ICD-10-PCS Code For Nasal Bone: Procedure Code Group Overview

0N9C-SPHENOID-BONE-DRAINAGE

ICD-10-PCS Code For Sphenoid Bone: Procedure Code Group Overview

0N9F-ETHMOID-BONE-RIGHT-DRAINAGE

ICD-10-PCS Code For Ethmoid Bone Right: Procedure Code Group Overview

0N9G-ETHMOID-BONE-LEFT-DRAINAGE

ICD-10-PCS Code For Ethmoid Bone, Left: Procedure Code Group Overview

Showing 1–10 of 22

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 Occipital Bone: Procedure Code Group Overview

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

Occipital Bone Drainage Procedure Overview

Code Attributes

ICD-10-PCS Code For Occipital Bone: Procedure Code Group Overview

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

Occipital Bone Drainage Procedure Overview

Code Attributes

When to Use

ICD-10-PCS Codes

DRG Codes

Typical Clinical Scenarios

Related Codes

Which procedures are included in the 0N97 ICD-10-PCS code group?

What is the clinical purpose of procedures in the Occipital Bone drainage group?

What are the code attributes for the 0N97 group that coders should note?

How do 0N97 codes relate to DRG assignment?

Which specific codes indicate the use of a drainage device or a diagnostic drainage?

References

When to Use

ICD-10-PCS Codes

DRG Codes

Typical Clinical Scenarios

Related Codes

Which procedures are included in the 0N97 ICD-10-PCS code group?

What is the clinical purpose of procedures in the Occipital Bone drainage group?

What are the code attributes for the 0N97 group that coders should note?

How do 0N97 codes relate to DRG assignment?

Which specific codes indicate the use of a drainage device or a diagnostic drainage?

References