DxCodebookFY2027 · Oct 1, 2026 – Sep 30, 2027

Category · FY2027

C80 Malignant neoplasm without specification of site

  • Header · not billable

C80 is not billable. The category heads 3 billable codes in FY2027: the 3 codes directly below it.

Index → code

  • Carcinomatosis → C80.0
  • Tumormalignant → C80.1
  • Sarcomatosisunspecified site → C80.1

Where it sits

  1. Chapter 2 Neoplasms (C00-D49)
  2. C76-C80 Malignant neoplasms of ill-defined, other secondary and unspecified sites (C76-C80)
  3. C80 Malignant neoplasm without specification of site
Billable codes
3
Subdivisions
3
CC / MCC codes
2 / 0
HCC V28 codes
3
New FY2027
0
Index entries
15

Codes in C80

  1. C80.0
    Disseminated malignant neoplasm, unspecified
    BillableCC18
    Inclusion terms 3

    Inclusion terms

    • Carcinomatosis NOS
    • Generalized cancer, unspecified site (primary) (secondary)
    • Generalized malignancy, unspecified site (primary) (secondary)
  2. C80.1
    Malignant (primary) neoplasm, unspecified
    Billable23
    Inclusion terms 4, Excludes1 1

    Inclusion terms

    • Cancer NOS
    • Cancer unspecified site (primary)
    • Carcinoma unspecified site (primary)
    • Malignancy unspecified site (primary)

    Excludes1

    • secondary malignant neoplasm of unspecified site (C79.9) C79.9
  3. C80.2
    Malignant neoplasm associated with transplanted organ
    BillableCC23
    Code first 1, Use additional code 1

    Code first

    • complication of transplanted organ (T86.-) T86

    Use additional code

    • code to identify the specific malignancy

CC/MCC: as a secondary diagnosis, unless the principal diagnosis is on the code’s PDX exclusion list (MS-DRG v44 Appendix C; list on the code card).

Sources of each column.

Instructions

At C80

Excludes1

  • malignant carcinoid tumor of unspecified site (C7A.00) C7A.00
  • malignant neoplasm of specified multiple sites- code to each site

Notes that also apply

Chapter 2 instructions (Notes 8): printed on the chapter 2 page.

Index entries

  • Carcinomatosis → C80.0
  • Carcinoma (malignant)generalized, with unspecified primary site → C80.0
  • Carcinomatosisunspecified site (primary) (secondary) → C80.0
  • Cancerunspecified site (primary) → C80.1
  • Carcinoma (malignant)unspecified site (primary) → C80.1
  • Malignancyunspecified site (primary) → C80.1
  • Sarcomatosisunspecified site → C80.1
  • Tumormalignant → C80.1
  • Tumormalignantfusiform cell (type) → C80.1
  • Tumormalignantgiant cell (type) → C80.1
  • Tumormalignantmixed NEC → C80.1
  • Tumormalignantsmall cell (type) → C80.1
  • Tumormalignantspindle cell (type) → C80.1
  • Tumormalignantunclassified → C80.1
  • Complication(s) (from) (of)transplantmalignant neoplasm → C80.2

NCHS Alphabetic Index. Index first, then the Tabular List.

Hierarchy