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ICD 10 Code 0NS644Z

Reposition Left Temporal Bone with Internal Fixation Device, Percutaneous Endoscopic Approach
“Reposition L Temporal Bone with Int Fix, Perc Endo Approach” for short

0NS644Z is a valid billable ICD-10 procedure code for Reposition Left Temporal Bone with Internal Fixation Device, Percutaneous Endoscopic Approach. It is found in the 2025 version of the ICD-10 Procedure Coding System (PCS) and can be used in all HIPAA-covered transactions from Oct 01, 2024 - Sep 30, 2025.

Reposition involves:
Moving to its normal location, or other suitable location, all or a portion of a body part. The body part is moved to a new location from an abnormal location, or from a normal location where it is not functioning correctly. The body part may or may not be cut out or off to be moved to the new location

Percutaneous Endoscopic approach 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

Reposition includes:

  • Reposition of undescended testicle, fracture reduction

Temporal Bone, Left body part includes:

  • Mastoid process
  • Petrous part of temporal bone
  • Tympanic part of temporal bone
  • Zygomatic process of temporal bone
MS-DRG - Medicare Severity-Diagnosis Related Group
  • MDC 01 Diseases & Disorders of the Nervous System
    Craniotomy with Major Device Implant or Acute Complex CNS PDX
    • DRG 023 - CRANIOTOMY WITH MAJOR DEVICE IMPLANT OR ACUTE COMPLEX CNS PDX WITH MCC OR CHEMOTHERAPY IMPLANT OR EPILEPSY WITH NEUROSTIMULATOR
    • DRG 024 - CRANIOTOMY WITH MAJOR DEVICE IMPLANT OR ACUTE COMPLEX CNS PDX WITHOUT MCC
  • MDC 01 Diseases & Disorders of the Nervous System
    Craniotomy and Endovascular Intracranial Procedures
    • DRG 025 - CRANIOTOMY AND ENDOVASCULAR INTRACRANIAL PROCEDURES WITH MCC
    • DRG 026 - CRANIOTOMY AND ENDOVASCULAR INTRACRANIAL PROCEDURES WITH CC
    • DRG 027 - CRANIOTOMY AND ENDOVASCULAR INTRACRANIAL PROCEDURES WITHOUT CC/MCC
  • MDC 08 Diseases & Disorders of the Musculoskeletal System & Connective Tissue
    Other Musculoskeletal System and Connective Tissue O.R. Procedures
    • DRG 515 - OTHER MUSCULOSKELETAL SYSTEM AND CONNECTIVE TISSUE O.R. PROCEDURES WITH MCC
    • DRG 516 - OTHER MUSCULOSKELETAL SYSTEM AND CONNECTIVE TISSUE O.R. PROCEDURES WITH CC
    • DRG 517 - OTHER MUSCULOSKELETAL SYSTEM AND CONNECTIVE TISSUE O.R. PROCEDURES WITHOUT CC/MCC
  • MDC 21 Injuries, Poisonings & Toxic Effects of Drugs
    Other O.R. Procedures for Injuries
    • DRG 907 - OTHER O.R. PROCEDURES FOR INJURIES WITH MCC
    • DRG 908 - OTHER O.R. PROCEDURES FOR INJURIES WITH CC
    • DRG 909 - OTHER O.R. PROCEDURES FOR INJURIES WITHOUT CC/MCC
  • MDC 24 Multiple Significant Trauma
    Craniotomy for Multiple Significant Trauma
    • DRG 955 - CRANIOTOMY FOR MULTIPLE SIGNIFICANT TRAUMA

ICD-10-PCS code structure for 0NS644Z — See Table View

1: Section 0 Medical and Surgical
2: Body System N Head and Facial Bones
3: Root Operation S Reposition
4: Body Part 6 Temporal Bone, Left
5: Approach 4 Percutaneous Endoscopic
6: Device 4 Internal Fixation Device
7: Qualifier Z No Qualifier

See also

  • The ICD-10-PCS Index of common procedure terms.
  • Medical and Surgical terms in the ICD-10-PCS Definitions table. These definitions may also provide additional explanation and/or examples within this section.
  • The ICD-10-PCS Device Aggregation Table containing entries that correlate a specific ICD-10-PCS device value with a general device value to be used in tables containing only general device values.