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ICD-10-CM 2027 diagnosis code

C74.12Malignant neoplasm of medulla of left adrenal gland

✓ Billable / specificCC — complication/comorbidity

C74.12 is a valid, billable ICD-10-CM code for malignant neoplasm of medulla of left adrenal gland. It can be reported on claims for dates of service from October 1, 2026 – September 30, 2027.

Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About C74.12

C74.12 is the ICD-10-CM diagnosis code for malignant neoplasm of medulla of left adrenal gland. It belongs to category C74 (malignant neoplasm of adrenal gland), block C73-C75 (malignant neoplasms of thyroid and other endocrine glands) and chapter 2 (neoplasms). It is billable, so it can be reported on its own for dates of service from October 1, 2026 through September 30, 2027.

Within C74.1 (malignant neoplasm of medulla of adrenal gland), C74.12 is specifically for malignant neoplasm of medulla of left adrenal gland. Related codes cover unspecified adrenal gland (C74.10) and right adrenal gland (C74.11).

As a secondary diagnosis it is a CC (complication or comorbidity), which can move an inpatient stay into the "with CC" MS-DRG of its family, unless the principal diagnosis excludes it.

In MS-DRG v44.0, it is part of the grouping logic for DRG 643 (Endocrine Disorders with MCC, relative weight 1.6139), DRG 644 (Endocrine Disorders with CC, relative weight 1.0044) and DRG 645 (Endocrine Disorders without CC/MCC, relative weight 0.7459), in MDC 10 (Endocrine, Nutritional and Metabolic Diseases and Disorders), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.

Before ICD-10, this condition was coded in ICD-9-CM as 194.0 (malignant neoplasm of adrenal gland).

Notes that apply from higher levels

Instructions written at a parent level also apply to C74.12.

Broader instructions also apply from Chapter 2: Neoplasms.

MS-DRG v44.0 grouping

All DRGs →

Inpatient MS-DRGs this diagnosis can group to, as the principal or a secondary diagnosis, depending on the rest of the claim.

ICD-9-CM equivalent

Converter →
  • 194.0Malignant neoplasm of adrenal glandapproximate

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 C74.12

Is C74.12 billable?

Yes. C74.12 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).

Can C74.12 be used as a principal diagnosis?

Yes. The Medicare Code Editor doesn't restrict C74.12 as a principal diagnosis.

Is C74.12 a CC or MCC?

C74.12 is a CC (complication or comorbidity) under MS-DRG v44.0, unless excluded by the principal diagnosis.

What DRG does C74.12 group to?

C74.12 is used in the MS-DRG v44.0 logic for MS-DRG 643 (Endocrine Disorders with MCC), MS-DRG 644 (Endocrine Disorders with CC) and MS-DRG 645 (Endocrine Disorders without CC/MCC). Which one applies depends on whether it is the principal diagnosis and on the rest of the claim.

What is the ICD-9 code for C74.12?

The CMS General Equivalence Mappings map C74.12 to ICD-9-CM 194.0.