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ICD-10-PCS 2027 procedure code

079M40ZDrainage of Thymus with Drainage Device, Percutaneous Endoscopic Approach

✓ Valid for 2027O.R. procedure

Short description: Drainage of Thymus with Drainage Device, Perc Endo 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 079M40Z

079M40Z is the ICD-10-PCS code for a drainage procedure on the thymus using a percutaneous endoscopic approach with drainage device. In ICD-10-PCS, drainage means taking or letting out fluids and/or gases from a body part.

In plain terms, this corresponds to other incision of thymus, the ICD-9-CM procedure title it maps to (07.92).

For a different body part, codes include 079040Z (lymphatic, head), 079140Z (lymphatic, right neck), 079240Z (lymphatic, left neck), 079340Z (lymphatic, right upper extremity), 079440Z (lymphatic, left upper extremity), 079540Z (lymphatic, right axillary) and 15 more.

The same procedure with a different approach is coded 079M00Z (open) and 079M30Z (percutaneous).

With a different device, use 079M4ZZ (no device).

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
9Drainage

Taking or letting out fluids and/or gases from a body part

The qualifier DIAGNOSTIC is used to identify drainage procedures that are biopsies

Includes: Thoracentesis, incision and drainage

4. Body Part
MThymus

Includes: Thymus gland

5. Approach
4Percutaneous Endoscopic

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
0Drainage Device

Includes: Cystostomy tube; Foley catheter; Percutaneous nephrostomy catheter; Thoracostomy tube

7. Qualifier
ZNo Qualifier

Other versions of this procedure

Different device

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 →
  • 07.92Other incision of thymusapproximate

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 079M40Z

Is 079M40Z a valid ICD-10-PCS code for 2027?

Yes. 079M40Z is valid for inpatient procedures from October 1, 2026 through September 30, 2027.

Is 079M40Z an O.R. procedure?

Yes. 079M40Z is an O.R. procedure in MS-DRG v44.0.

What DRG does 079M40Z group to?

Depending on the principal diagnosis, 079M40Z 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 079M40Z?

The CMS GEMs map 079M40Z to ICD-9-CM 07.92 (Other incision of thymus).