ICD-10-PCS Code For Parotid Gland, Left: Procedure Code Group Overview

The International Classification of Diseases, Tenth Revision, Procedure Coding System (ICD-10-PCS) code group 0C99 includes procedures performed to drain fluids or pus from the parotid gland in the mouth and throat. These ICD-10-PCS codes are used for inpatient documentation when a patient requires evacuation of fluid, abscess drainage, or decompression of the left parotid gland. Accurate coding within the ICD-10-PCS 0C99 group is essential for proper inpatient reimbursement, as it captures the procedure performed and determines appropriate case mix and payment.

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Parotid Gland, Left Drainage Procedure Overview

Procedures in this group involve drainage of the left parotid gland, a salivary gland in the mouth and throat body system. These operations remove fluid or pus from the gland to treat infections, abscesses, or obstructive sialadenitis. Accurate ICD-10-PCS coding ensures inpatient documentation reflects the specific drainage procedure performed and supports appropriate reimbursement.

Code Attributes

Character	ICD-10-PCS Category	Code Group Details
0	Section	Medical and Surgical
C	Body System	Mouth and Throat
9	Operation	Drainage
9	Body Part	Parotid Gland, Left

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ICD-10-PCS Code For Parotid Gland, Left: Procedure Code Group Overview

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Parotid Gland, Left Drainage Procedure Overview

Code Attributes

Character	ICD-10-PCS Category	Code Group Details
0	Section	Medical and Surgical
C	Body System	Mouth and Throat
9	Operation	Drainage
9	Body Part	Parotid Gland, Left

When to Use

Use a code from this group when an inpatient undergoes drainage of the left parotid gland for infection, abscess, or obstructive causes. Assign the code when documentation specifies drainage of the left parotid gland as the performed operation.

ICD-10-PCS Codes

6 rows

ICD-10-PCS Code	Description
0C9900Z	Drainage of Left Parotid Gland with Drainage Device, Open Approach
0C990ZX	Drainage of Left Parotid Gland, Open Approach, Diagnostic
0C990ZZ	Drainage of Left Parotid Gland, Open Approach
0C9930Z	Drainage of Left Parotid Gland with Drainage Device, Percutaneous Approach
0C993ZX	Drainage of Left Parotid Gland, Percutaneous Approach, Diagnostic
0C993ZZ	Drainage of Left Parotid Gland, Percutaneous Approach

DRG Codes

4 rows

DRG Code	Description
139	Salivary Gland Procedures
987	Non-Extensive O.R. Procedures Unrelated to Principal Diagnosis with MCC
988	Non-Extensive O.R. Procedures Unrelated to Principal Diagnosis with CC
989	Non-Extensive O.R. Procedures Unrelated to Principal Diagnosis without CC/MCC

Typical Clinical Scenarios

A 48-year-old man presents to the emergency department with acute onset left facial swelling, erythema, fever, and severe pain over the preauricular region. Imaging and clinical exam reveal a fluctuant abscess within the left parotid gland requiring prompt evacuation; an open incision and drainage with placement of a drain is performed for source control and to allow continued postoperative drainage. This is an acute/emergency drainage of the left parotid gland for infected collection. Typical codes: 0C9900Z
A 62-year-old woman with recurrent obstructive sialadenitis of the left parotid due to calculi and chronic ductal stenosis is admitted electively after failed outpatient conservative measures. A planned percutaneous drainage procedure is performed under imaging guidance to decompress a chronic fluid collection and obtain cultures to guide further management. This elective inpatient drainage addresses persistent symptoms and reduces infection risk before definitive therapy. Typical codes: 0C9930Z
A 55-year-old patient previously treated for a left parotid abscess with percutaneous aspiration returns with recurrent purulent drainage and a persistent sinus tract despite antibiotics. The team performs an open drainage and exploration without device placement to debride the cavity and obtain cultures, because prior percutaneous attempts failed and there is chronic infected tissue requiring direct access. This represents a complication/revision drainage for unresolved infection of the left parotid gland. Typical codes: 0C990ZX, 0C990ZZ

Related Codes

0C90-UPPER-LIP-TAKING-OR-LETTING-OUT

ICD-10-PCS Code For Upper Lip: Procedure Code Group Overview

0C91-LOWER-LIP-DRAINAGE

ICD-10-PCS Code For Lower Lip: Procedure Code Group Overview

0C92-HARD-PALATE-DRAINAGE

ICD-10-PCS Code For Hard Palate: Procedure Code Group Overview

0C93-SOFT-PALATE-DRAINAGE

ICD-10-PCS Code For Soft Palate: Procedure Code Group Overview

0C94-BUCCAL-MUCOSA-DRAINAGE

ICD-10-PCS Code For Buccal Mucosa: Procedure Code Group Overview

0C95-UPPER-GINGIVA-DRAINAGE

ICD-10-PCS Code For Upper Gingiva: Procedure Code Group Overview

0C96-LOWER-GINGIVA-DRAINAGE

ICD-10-PCS Code For Lower Gingiva: Procedure Code Group Overview

0C97-TONGUE-DRAINAGE

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

0C98-PAROTID-GLAND-RIGHT-DRAINAGE

ICD-10-PCS Code For Parotid Gland Right: Procedure Code Group Overview

0C9B-PAROTID-DUCT-DRAINAGE

ICD-10-PCS Code For Parotid Duct: Procedure Code Group Overview

Showing 1–10 of 26

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

6 rows

ICD-10-PCS Code	Description
0C9900Z	Drainage of Left Parotid Gland with Drainage Device, Open Approach
0C990ZX	Drainage of Left Parotid Gland, Open Approach, Diagnostic
0C990ZZ	Drainage of Left Parotid Gland, Open Approach
0C9930Z	Drainage of Left Parotid Gland with Drainage Device, Percutaneous Approach
0C993ZX	Drainage of Left Parotid Gland, Percutaneous Approach, Diagnostic
0C993ZZ	Drainage of Left Parotid Gland, Percutaneous Approach

DRG Codes

4 rows

DRG Code	Description
139	Salivary Gland Procedures
987	Non-Extensive O.R. Procedures Unrelated to Principal Diagnosis with MCC
988	Non-Extensive O.R. Procedures Unrelated to Principal Diagnosis with CC
989	Non-Extensive O.R. Procedures Unrelated to Principal Diagnosis without CC/MCC

Typical Clinical Scenarios

A 48-year-old man presents to the emergency department with acute onset left facial swelling, erythema, fever, and severe pain over the preauricular region. Imaging and clinical exam reveal a fluctuant abscess within the left parotid gland requiring prompt evacuation; an open incision and drainage with placement of a drain is performed for source control and to allow continued postoperative drainage. This is an acute/emergency drainage of the left parotid gland for infected collection. Typical codes: 0C9900Z
A 62-year-old woman with recurrent obstructive sialadenitis of the left parotid due to calculi and chronic ductal stenosis is admitted electively after failed outpatient conservative measures. A planned percutaneous drainage procedure is performed under imaging guidance to decompress a chronic fluid collection and obtain cultures to guide further management. This elective inpatient drainage addresses persistent symptoms and reduces infection risk before definitive therapy. Typical codes: 0C9930Z
A 55-year-old patient previously treated for a left parotid abscess with percutaneous aspiration returns with recurrent purulent drainage and a persistent sinus tract despite antibiotics. The team performs an open drainage and exploration without device placement to debride the cavity and obtain cultures, because prior percutaneous attempts failed and there is chronic infected tissue requiring direct access. This represents a complication/revision drainage for unresolved infection of the left parotid gland. Typical codes: 0C990ZX, 0C990ZZ

Related Codes

0C90-UPPER-LIP-TAKING-OR-LETTING-OUT

ICD-10-PCS Code For Upper Lip: Procedure Code Group Overview

0C91-LOWER-LIP-DRAINAGE

ICD-10-PCS Code For Lower Lip: Procedure Code Group Overview

0C92-HARD-PALATE-DRAINAGE

ICD-10-PCS Code For Hard Palate: Procedure Code Group Overview

0C93-SOFT-PALATE-DRAINAGE

ICD-10-PCS Code For Soft Palate: Procedure Code Group Overview

0C94-BUCCAL-MUCOSA-DRAINAGE

ICD-10-PCS Code For Buccal Mucosa: Procedure Code Group Overview

0C95-UPPER-GINGIVA-DRAINAGE

ICD-10-PCS Code For Upper Gingiva: Procedure Code Group Overview

0C96-LOWER-GINGIVA-DRAINAGE

ICD-10-PCS Code For Lower Gingiva: Procedure Code Group Overview

0C97-TONGUE-DRAINAGE

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

0C98-PAROTID-GLAND-RIGHT-DRAINAGE

ICD-10-PCS Code For Parotid Gland Right: Procedure Code Group Overview

0C9B-PAROTID-DUCT-DRAINAGE

ICD-10-PCS Code For Parotid Duct: Procedure Code Group Overview

Showing 1–10 of 26

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 Parotid Gland, Left: Procedure Code Group Overview

Sign up for ICD-10-PCS Code For Parotid Gland, Left: Procedure Code Group Overview policy alerts

Parotid Gland, Left Drainage Procedure Overview

Code Attributes

ICD-10-PCS Code For Parotid Gland, Left: Procedure Code Group Overview

Sign up for ICD-10-PCS Code For Parotid Gland, Left: Procedure Code Group Overview policy alerts

Parotid Gland, Left Drainage Procedure Overview

Code Attributes

When to Use

ICD-10-PCS Codes

DRG Codes

Typical Clinical Scenarios

Related Codes

Which procedures are included in ICD-10-PCS code group 0C99 for the left parotid gland?

What is the section and operation designation for codes in the 0C99 group?

How do the specific codes differentiate approach and device use?

Which DRG is directly associated with salivary gland procedures in this group?

When should these ICD-10-PCS codes be used in inpatient documentation?

References

When to Use

ICD-10-PCS Codes

DRG Codes

Typical Clinical Scenarios

Related Codes

Which procedures are included in ICD-10-PCS code group 0C99 for the left parotid gland?

What is the section and operation designation for codes in the 0C99 group?

How do the specific codes differentiate approach and device use?

Which DRG is directly associated with salivary gland procedures in this group?

When should these ICD-10-PCS codes be used in inpatient documentation?

References