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ICD-10-PCS 2027 procedure code

07JM0ZZInspection of Thymus, Open Approach

✓ Valid for 2027O.R. procedure

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 07JM0ZZ

07JM0ZZ is the ICD-10-PCS code for a inspection procedure on the thymus using an open approach. In ICD-10-PCS, inspection means visually and/or manually exploring a body part.

In plain terms, this corresponds to exploration of thymus field, the ICD-9-CM procedure title it maps to (07.91).

For a different body part, codes include 07JK0ZZ (thoracic duct), 07JL0ZZ (cisterna chyli), 07JN0ZZ (lymphatic), 07JP0ZZ (spleen) and 07JT0ZZ (bone marrow).

The same procedure with a different approach is coded 07JM3ZZ (percutaneous) and 07JM4ZZ (percutaneous endoscopic).

It is an operating-room procedure in the MS-DRG logic for DRG 163 (Major Chest Procedures with MCC), DRG 164 (Major Chest Procedures with CC), DRG 165 (Major Chest Procedures without CC/MCC), DRG 628 (Other Endocrine, Nutritional and Metabolic O.R. Procedures with MCC or Insertion of Antibiotic-eluting Bone Void Filler), DRG 629 (Other Endocrine, Nutritional and Metabolic O.R. Procedures with CC) and DRG 630 (Other Endocrine, Nutritional and Metabolic O.R. Procedures without CC/MCC), under the surgical categories “Major Chest Procedures”, “Other Endocrine, Nutritional and Metabolic O.R. Procedures”, “Other O.R. Procedures of the Blood and Blood Forming Organs” and 4 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
7Lymphatic and Hemic Systems
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
MThymus

Includes: Thymus gland

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

MS-DRG v44.0 grouping

All DRGs →

Surgical MS-DRGs this procedure can group to, depending on the principal diagnosis's MDC.

ICD-9-CM equivalent

Converter →
  • 07.91Exploration of thymus fieldapproximate

From the CMS 2018 General Equivalence Mappings (GEMs), the final GEMs release.

Code history

  1. 2016
  2. 2017
  3. 2018
  4. 2019
  5. 2020
  6. 2021
  7. 2022
  8. 2023
  9. 2024
  10. 2025
  11. 2026
  12. 2027
  • FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
  • No changes since FY2016.

Common questions about 07JM0ZZ

Is 07JM0ZZ a valid ICD-10-PCS code for 2027?

Yes. 07JM0ZZ is valid for inpatient procedures from October 1, 2026 through September 30, 2027.

Is 07JM0ZZ an O.R. procedure?

Yes. 07JM0ZZ is an O.R. procedure in MS-DRG v44.0.

What DRG does 07JM0ZZ group to?

Depending on the principal diagnosis, 07JM0ZZ can group to MS-DRG 163, MS-DRG 164, MS-DRG 165, MS-DRG 628, MS-DRG 629 and MS-DRG 630.

What is the ICD-9 procedure code for 07JM0ZZ?

The CMS GEMs map 07JM0ZZ to ICD-9-CM 07.91 (Exploration of thymus field).