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D49Non-billableSave

D49 - Neoplasms of unspecified behavior

ICD-10-CM Chapter 2: Neoplasms · D49 Neoplasms of unspecified behavior (D49) · Top-level category · FY2027

Coding Guidance

D49 is a non-billable heading. Report one of the 10 more specific codes below.

Includes, Excludes and Coding Notes

IncludesFrom D49

Conditions this code covers.

  • 'growth' NOS
  • neoplasm NOS
  • new growth NOS
  • tumor NOS
Excludes 2 — Not Included HereFrom D49

Not part of this code; report both codes when the patient has both conditions.

  • neoplasms of uncertain behavior (D37-D44, D48)
NotesFrom D49

Instructional notes from the ICD-10-CM tabular list.

  • Category D49 classifies by site neoplasms of unspecified morphology and behavior. The term 'mass', unless otherwise stated, is not to be regarded as a neoplastic growth.
NotesFrom Chapter C00-D49

Instructional notes from the ICD-10-CM tabular list.

  • Functional activity
  • All neoplasms are classified in this chapter, whether they are functionally active or not. An additional code from Chapter 4 may be used, to identify functional activity associated with any neoplasm.
  • Morphology [Histology]
  • Chapter 2 classifies neoplasms primarily by site (topography), with broad groupings for behavior, malignant, in situ, benign, etc. The Table of Neoplasms should be used to identify the correct topography code. In a few cases, such as for malignant melanoma and certain neuroendocrine tumors, the morphology (histologic type) is included in the category and codes.
  • Primary malignant neoplasms overlapping site boundaries
  • A primary malignant neoplasm that overlaps two or more contiguous (next to each other) sites should be classified to the subcategory/code .8 ('overlapping lesion'), unless the combination is specifically indexed elsewhere. For multiple neoplasms of the same site that are not contiguous, such as tumors in different quadrants of the same breast, codes for each site should be assigned.
  • Malignant neoplasm of ectopic tissue
  • Malignant neoplasms of ectopic tissue are to be coded to the site mentioned, e.g., ectopic pancreatic malignant neoplasms are coded to pancreas, unspecified (C25.9).

More Specific Codes (10)

D49.0Neoplasm of unspecified behavior of digestive system→D49.1Neoplasm of unspecified behavior of respiratory system→D49.2Neoplasm of unspecified behavior of bone, soft tissue, and skin→D49.3Neoplasm of unspecified behavior of breast→D49.4Neoplasm of unspecified behavior of bladder→D49.5Neoplasm of unspecified behavior of other genitourinary organs→D49.6Neoplasm of unspecified behavior of brain→D49.7Neoplasm of unspecified behavior of endocrine glands and other parts of nervous system→D49.8Neoplasm of unspecified behavior of other specified sites→D49.9Neoplasm of unspecified behavior of unspecified site→

Related condition guides

Documentation requirements, coding pitfalls and FAQs for conditions coded with D49.