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  6. 0NN64ZZ
  • Version 2025
  • Billable Code

2025 ICD-10-CM Procedure Code 0NN64ZZ

Release Left Temporal Bone, Percutaneous Endoscopic Approach

ICD-10-PCS Code:
0NN64ZZ
ICD-10-PCS Code for:
Release Left Temporal Bone, Percutaneous Endoscopic Approac
Is Billable?
Yes - Valid for Submission
Code Navigator:

0NN64ZZ is a billable procedure code used to specify the performance of release left temporal bone, percutaneous endoscopic approach. The code is valid for the year 2025 for the submission of HIPAA-covered transactions. The procedure code involves freeing a body part from an abnormal physical constraint by cutting or by the use of force. Procedure code explanation: some of the restraining tissue may be taken out but none of the body part is taken out adhesiolysis, carpal tunnel release

0NN64ZZ PCS Table

In an PCS table each code is represented by up seven alphanumeric characters, with each character in the table respresenting different aspects of the procedure. In the table provided below, each row represents an individual character and includes information about the character's position, designation, label, and procedure notes. For this PCS table the procedure code is in the medical and surgical section and is part of the head and facial bones body system, classified under release operation. The applicable bodypart for this procedure code is temporal bone, left.

Position Designation Character Label Procedures Notes
1 Section 0 Medical and Surgical
2 Body System N Head and Facial Bones
3 Operation N Release

Involves:
Freeing a body part from an abnormal physical constraint by cutting or by the use of force

Explanation:
Some of the restraining tissue may be taken out but none of the body part is taken out

Includes:
  • Adhesiolysis, carpal tunnel release
4 BodyPart 6 Temporal Bone, Left Includes:
  • Mastoid process
  • Petrous part of temporal bone
  • Tympanic part of temporal bone
  • Zygomatic process of temporal bone
5 Approach 4 Percutaneous Endoscopic

Involves:
Entry, by puncture or minor incision, of instrumentation through the skin or mucous membrane and any other body layers necessary to reach and visualize the site of the procedure
6 Device Z No Device

Explanation:
The value Z is used for the sixth character to indicate that a specific device does not apply to the procedure.
7 Qualifier Z No Qualifier

Explanation:
The value Z is used for the seventh character to indicate that a specific qualifier does not apply to the procedure.

Clinical Classification

Musculoskeletal procedures, NEC

CCSR Code: MST030

Clinical Domain: Musculoskeletal, Subcutaneous Tissue, and Fascia Procedures MST contains 30 categories that include procedures performed on the musculoskeletal, subcutaneous tissue, and fascia. Examples include hip arthroplasty, knee arthroplasty, spine fusion, and toe and midfoot amputation.

Convert to ICD-9-PCS

Below are the ICD-9=PCS code(s) that most closely match this ICD-10-PCS code, based on the General Equivalence Mappings (GEMs). This ICD-10-PCS to ICD-9-PCS crosswalk tool is helpful for coders who need to reference legacy diagnosis codes for audits, historical claims, or approximate code comparisons.

ICD-9-PCS Code

Code: 206

Approximate Flag: This is an approximate match. The ICD-9-PCS code reflects a close but not exact equivalent of the ICD-10-PCS procedure.

Other ICD-10-PCS Codes Used for Release Temporal Bone, Left

  • 0NN60ZZ Release Left Temporal Bone, Open Approach
  • 0NN63ZZ Release Left Temporal Bone, Percutaneous Approach

What is ICD-10-PCS?

The ICD-10 Procedure Coding System (ICD-10-PCS) is a catalog of procedural codes used by medical professionals for hospital inpatient healthcare settings. The Centers for Medicare and Medicaid Services (CMS) maintain the catalog in the U.S. releasing yearly updates. The 2025 ICD-10-PCS codes are to be used for discharges occurring from October 1, 2024 through September 30, 2025.

Each ICD-10-PCS code has a structure of seven alphanumeric characters and contains no decimals. The first character defines the major "section". Depending on the "section" the second through seventh characters mean different things.