2026 ICD-10-CM Diagnosis Code C75.9Malignant neoplasm of endocrine gland, unspecified
ICD-10-CM Codes›C00–D49›C73-C75›C75
- Billable — Valid for Submission
- Chronic Condition
C75.9 is a billable ICD-10-CM diagnosis code for malignant neoplasm of endocrine gland, unspecified. 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 neoplasm of endocrine gland. 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 neoplasm of endocrine gland
- Primary malignant epithelial neoplasm of endocrine gland
- Primary malignant neoplasm of endocrine gland
- Primary malignant neoplasm of multiple endocrine glands
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. |
|---|---|---|---|---|---|---|
| endocrine gland NEC | C75.9 | C79.89 | D09.3 | D35.9 | D44.9 | D49.7 |
| gland, glandular (lymphatic) (system) [See Also: Neoplasm, lymph gland] | C75.9 | C79.89 | D09.3 | D35.9 | D44.9 | D49.7 |
| gland, glandular (lymphatic) (system) [See Also: Neoplasm, lymph gland] › endocrine NEC | C75.9 | C79.89 | D09.3 | D35.9 | D44.9 | D49.7 |
Patient EducationClinical
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Convert C75.9 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About C75.9Overview
Is C75.9 a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report malignant neoplasm of endocrine gland, unspecified on HIPAA-covered claims from October 1, 2025 through September 30, 2026.
What MS-DRG does C75.9 group to?
When malignant neoplasm of endocrine gland, unspecified 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 C75.9?
Under the General Equivalence Mappings, malignant neoplasm of endocrine gland, unspecified converts to ICD-9-CM 194.9 (mal neo endocrine NOS). The mapping is a direct match.
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.
