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 820 — LYMPHOMA AND LEUKEMIA WITH MAJOR O.R. PROCEDURES WITH MCC (MDC 17)
MS-DRG 821 — LYMPHOMA AND LEUKEMIA WITH MAJOR O.R. PROCEDURES WITH CC (MDC 17)
MS-DRG 822 — LYMPHOMA AND LEUKEMIA WITH MAJOR O.R. PROCEDURES WITHOUT CC/MCC (MDC 17)
MS-DRG 823 — LYMPHOMA AND NON-ACUTE LEUKEMIA WITH OTHER PROCEDURES WITH MCC (MDC 17)
MS-DRG 824 — LYMPHOMA AND NON-ACUTE LEUKEMIA WITH OTHER PROCEDURES WITH CC (MDC 17)
MS-DRG 825 — LYMPHOMA AND NON-ACUTE LEUKEMIA WITH OTHER PROCEDURES WITHOUT CC/MCC (MDC 17)
MS-DRG 840 — LYMPHOMA AND NON-ACUTE LEUKEMIA WITH MCC (MDC 17)
MS-DRG 841 — LYMPHOMA AND NON-ACUTE LEUKEMIA WITH CC (MDC 17)
MS-DRG 842 — LYMPHOMA AND NON-ACUTE LEUKEMIA WITHOUT CC/MCC (MDC 17)

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.

HCC 18 — Cancer Metastatic to Bone, Other and Unspecified Metastatic Cancer; Acute Leukemia Except Myeloid (supersedes HCC 19, HCC 20, HCC 21, HCC 22, HCC 23)

Other models: CMS-HCC V22 HCC 8 · 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.

Secondary and unspecified malignant neoplasm of intrapelvic lymph nodes is a billable ICD-10-CM diagnosis code (C77.5).

Sequencing, inclusion, and exclusion notes published for C77.5 in the official ICD-10-CM tabular list.

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

Official ICD-10-CM classifications closest to C77.5 in its code family, with their registry titles.

C77 — Secondary and unspecified malignant neoplasm of lymph nodes
C77.0 — Secondary and unspecified malignant neoplasm of lymph nodes of head, face and neck
C77.1 — Secondary and unspecified malignant neoplasm of intrathoracic lymph nodes
C77.2 — Secondary and unspecified malignant neoplasm of intra-abdominal lymph nodes
C77.3 — Secondary and unspecified malignant neoplasm of axilla and upper limb lymph nodes
C77.4 — Secondary and unspecified malignant neoplasm of inguinal and lower limb lymph nodes
C77.8 — Secondary and unspecified malignant neoplasm of lymph nodes of multiple regions
C77.9 — Secondary and unspecified malignant neoplasm of lymph node, unspecified

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

Neoplasm, neoplastic, lymph, lymphatic channel NEC, gland (secondary), hypogastric — Malignant, Secondary
Neoplasm, neoplastic, lymph, lymphatic channel NEC, gland (secondary), iliac — Malignant, Secondary
Neoplasm, neoplastic, lymph, lymphatic channel NEC, gland (secondary), intrapelvic — Malignant, Secondary
Neoplasm, neoplastic, lymph, lymphatic channel NEC, gland (secondary), obturator — Malignant, Secondary
Neoplasm, neoplastic, lymph, lymphatic channel NEC, gland (secondary), paracervical — Malignant, Secondary
Neoplasm, neoplastic, lymph, lymphatic channel NEC, gland (secondary), parametrial — Malignant, Secondary
Neoplasm, neoplastic, lymph, lymphatic channel NEC, gland (secondary), pelvic — Malignant, Secondary
Neoplasm, neoplastic, lymph, lymphatic channel NEC, gland (secondary), presymphysial — Malignant, Secondary
Neoplasm, neoplastic, lymph, lymphatic channel NEC, gland (secondary), sacral — Malignant, Secondary