2026 ICD-10-CM Diagnosis Code C74.91Malignant neoplasm of unspecified part of right adrenal gland
ICD-10-CM Codes›C00–D49›C73-C75›C74
- Billable — Valid for Submission
- Chronic Condition
C74.91 is a billable ICD-10-CM diagnosis code for malignant neoplasm of unspecified part of right adrenal gland. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 643 through 645. Coders also document this condition as malignant pheochromocytoma. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Endocrine system cancers - all other types.
Code Identity
Code Classification
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Malignant pheochromocytoma
- Primary malignant neoplasm of right adrenal gland
- Primary malignant pheochromocytoma
- Primary malignant pheochromocytoma of right adrenal gland
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Table of NeoplasmsClinical
Anatomical sites in the Table of Neoplasms that reference this code family.
| Site | Malig. Primary | Malig. Secondary | Ca in situ | Benign | Uncertain | Unspec. |
|---|---|---|---|---|---|---|
| adrenal | C74.9 | C79.7 | D09.3 | D35.0 | D44.1 | D49.7 |
| adrenal › capsule | C74.9 | C79.7 | D09.3 | D35.0 | D44.1 | D49.7 |
| adrenal › gland | C74.9 | C79.7 | D09.3 | D35.0 | D44.1 | D49.7 |
| suprarenal | C74.9 | C79.7 | D09.3 | D35.0 | D44.1 | D49.7 |
| suprarenal › capsule | C74.9 | C79.7 | D09.3 | D35.0 | D44.1 | D49.7 |
| suprarenal › gland | C74.9 | C79.7 | D09.3 | D35.0 | D44.1 | D49.7 |
Patient EducationClinical
Adrenal Gland Cancer
Your adrenal, or suprarenal, glands are located on the top of each kidney. These glands produce hormones that you can't live without, including sex hormones and cortisol, which helps you respond to stress and has many other functions.
Read the full article at MedlinePlus
Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.
Convert C74.91 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About C74.91Overview
Is C74.91 (Malignant neoplasm of unspecified part of adrenal gland) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report malignant neoplasm of unspecified part of right adrenal gland on HIPAA-covered claims from October 1, 2025 through September 30, 2026.
What MS-DRG does C74.91 group to?
When malignant neoplasm of unspecified part of right adrenal gland is the principal diagnosis on an inpatient stay, it groups to MS-DRG 643, 644, 645, with relative weights from 0.7683 to 1.6461 depending on complications. Higher weights mean higher Medicare reimbursement.
What is the ICD-9 equivalent of C74.91?
Under the General Equivalence Mappings, malignant neoplasm of unspecified part of right adrenal gland converts to ICD-9-CM 194.0 (malign neopl adrenal). The mapping is approximate, so confirm the match fits the documentation.
Footnotes
[1] Chronic - a chronic condition code indicates a condition lasting 12 months or longer and its effect on the patient based on one or both of the following criteria:
- The condition results in the need for ongoing intervention with medical products,treatment, services, and special equipment
- The condition places limitations on self-care, independent living, and social interactions.
