Billing Status: YES. This is a valid, specific, and billable ICD-10-CM reference.

Inpatient Payment Groups (MS-DRG)

MS-DRGs this diagnosis helps define, as principal or secondary, per the CMS ICD-10-CM/PCS MS-DRG Definitions Manual v43.0 (FY2026), Appendix B.

MS-DRG 435 — MALIGNANCY OF HEPATOBILIARY SYSTEM OR PANCREAS WITH MCC (MDC 07)
MS-DRG 436 — MALIGNANCY OF HEPATOBILIARY SYSTEM OR PANCREAS WITH CC (MDC 07)
MS-DRG 437 — MALIGNANCY OF HEPATOBILIARY SYSTEM OR PANCREAS WITHOUT CC/MCC (MDC 07)

A diagnosis appearing in a group's logic does not by itself determine the DRG assigned to a stay; the grouper uses the full claim.

Risk Adjustment (CMS-HCC)

Payment categories this diagnosis maps to under CMS-HCC V28, payment year 2026.

Other models: CMS-HCC V22 HCC 9 · RxHCC V08 HCC 20

Risk scores depend on the enrollee's full accepted diagnosis set and segment; a category mapping alone does not determine payment.

Code Set: Valid FY2026 and FY2027. FY2026 took effect October 1, 2025.

Malignant neoplasm of pancreas, unspecified is a billable ICD-10-CM diagnosis code (C25.9).

Sequencing, inclusion, and exclusion notes published for C25.9 in the official ICD-10-CM tabular list.

Conditions that can never be reported with this code; the two are mutually exclusive.

Conditions not covered by this code, but which may be reported alongside it when both are present.

Additional codes that may be required to fully describe the encounter.

Supplementary codes the tabular list directs you to add.

Official ICD-10-CM classifications closest to C25.9 in its code family, with their registry titles.

Clinical term phrases from the official ICD-10-CM Index to Diseases and Injuries that map to this code.

Anatomical sites from the official ICD-10-CM Table of Neoplasms that map to this code, with the matching behavior column.