ICD-10-PCS 2027 procedure code
0NJ00ZZInspection of Skull, Open Approach
Code unchanged since ICD-10-PCS took effect on October 1, 2015. Source: official FY2027 ICD-10-PCS release from CMS. Page updated September 29, 2026. About our data
About 0NJ00ZZ
0NJ00ZZ is the ICD-10-PCS code for a inspection procedure on the skull using an open approach. In ICD-10-PCS, inspection means visually and/or manually exploring a body part.
In plain terms, this corresponds to other diagnostic procedures on skull, the ICD-9-CM procedure title it maps to (01.19).
For a different body part, codes include 0NJB0ZZ (nasal bone) and 0NJW0ZZ (facial bone).
The same procedure with a different approach is coded 0NJ03ZZ (percutaneous), 0NJ04ZZ (percutaneous endoscopic) and 0NJ0XZZ (external).
It is an operating-room procedure in the MS-DRG logic for DRG 023 (Craniotomy with Major Device Implant or Acute Complex CNS Principal Diagnosis with MCC or Antineoplastic Implant or Epilepsy with Neurostimulator), DRG 024 (Craniotomy with Major Device Implant or Acute Complex CNS Principal Diagnosis without MCC), 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) and DRG 477 (Biopsies of Musculoskeletal System and Connective Tissue with MCC or Insertion of Antibiotic-eluting Bone Void Filler), under the surgical categories “Craniotomy with Major Device Implant or Acute Complex CNS Principal Diagnosis”, “Craniotomy and endovascular intracranial procedures”, “Biopsies of Musculoskeletal System and Connective Tissue” and 2 more.
It has been valid since ICD-10-PCS took effect on October 1, 2015.
What each character means
- 1. Section
- 0Medical and Surgical
- 2. Body System
- NHead and Facial Bones
- 3. Operation
- JInspection
Visually and/or manually exploring a body part
Visual exploration may be performed with or without optical instrumentation. Manual exploration may be performed directly or through intervening body layers
Includes: Diagnostic arthroscopy, exploratory laparotomy
- 4. Body Part
- 0Skull
- 5. Approach
- 0Open
Cutting through the skin or mucous membrane and any other body layers necessary to expose the site of the procedure
- 6. Device
- ZNo Device
- 7. Qualifier
- ZNo Qualifier
Other versions of this procedure
Different body part
Different approach
MS-DRG v44.0 grouping
All DRGs →Surgical MS-DRGs this procedure can group to, depending on the principal diagnosis's MDC.
MDC 01 · Diseases and Disorders of the Nervous System · Craniotomy with Major Device Implant or Acute Complex CNS Principal Diagnosis
MDC 01 · Diseases and Disorders of the Nervous System · Craniotomy and endovascular intracranial procedures
MDC 08 · Diseases and Disorders of the Musculoskeletal System and Connective Tissue · Biopsies of Musculoskeletal System and Connective Tissue
MDC 21 · Injuries, Poisonings and Toxic Effects of Drugs · Other O.R. Procedures for Injuries
MDC 24 · Multiple Significant Trauma · Other O.R. Procedures for Multiple Significant Trauma
ICD-9-CM equivalent
Converter →- 01.19Other diagnostic procedures on skullapproximate
From the CMS 2018 General Equivalence Mappings (GEMs), the final GEMs release.
Code history
- 2016
- 2017
- 2018
- 2019
- 2020
- 2021
- 2022
- 2023
- 2024
- 2025
- 2026
- 2027
- FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
- No changes since FY2016.
Common questions about 0NJ00ZZ
Is 0NJ00ZZ a valid ICD-10-PCS code for 2027?
- Yes. 0NJ00ZZ is valid for inpatient procedures from October 1, 2026 through September 30, 2027.
Is 0NJ00ZZ an O.R. procedure?
- Yes. 0NJ00ZZ is an O.R. procedure in MS-DRG v44.0.
What DRG does 0NJ00ZZ group to?
- Depending on the principal diagnosis, 0NJ00ZZ can group to MS-DRG 023, MS-DRG 024, MS-DRG 025, MS-DRG 026, MS-DRG 027 and MS-DRG 477.
What is the ICD-9 procedure code for 0NJ00ZZ?
- The CMS GEMs map 0NJ00ZZ to ICD-9-CM 01.19 (Other diagnostic procedures on skull).