D21.9
Benign neoplasm of connective and other soft tissue, unspecified
Billable FY2026 2025-10-01 → 2026-09-30
This is the unspecified option. 7 more
specific codes sit alongside it. Worth
checking whether the documentation supports one of them.
Exclusions 13 never code together
D21code
Excludes1
- benign neoplasm of articular cartilage (D16.-)D16.-
- benign neoplasm of cartilage of larynx (D14.1)D14.1
- benign neoplasm of cartilage of nose (D14.0)D14.0
- benign neoplasm of connective tissue of breast (D24.-)D24.-
- benign neoplasm of peripheral nerves and autonomic nervous system (D36.1-)D36.1-
- benign neoplasm of peritoneum (D20.1)D20.1
- benign neoplasm of retroperitoneum (D20.0)D20.0
- benign neoplasm of uterine ligament, any (D28.2)D28.2
- benign neoplasm of vascular tissue (D18.-)D18.-
- hemangioma (D18.0-)D18.0-
- lipomatous neoplasm (D17.-)D17.-
- lymphangioma (D18.1)D18.1
- uterine leiomyoma (D25.-)D25.-
Excludes1 — never code together. The excluded condition and this one are mutually exclusive.
Instructional notes 19
D21code
Includes
- benign neoplasm of blood vessel
- benign neoplasm of bursa
- benign neoplasm of cartilage
- benign neoplasm of fascia
- benign neoplasm of fat
- benign neoplasm of ligament, except uterine
- benign neoplasm of lymphatic channel
- benign neoplasm of muscle
- benign neoplasm of synovia
- benign neoplasm of tendon (sheath)
- benign stromal tumors
C00-D49chapter
Notes
- 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).C25.9
Index entries leading here 2
Alongside this code 7 same parent — D21
D21.0 Benign neoplasm of connctv/soft tiss of head, face and neck D21.1 Benign neoplm of connctv/soft tiss of upper limb, inc shldr category D21.2 Benign neoplasm of connctv/soft tiss of lower limb, inc hip category D21.3 Benign neoplasm of connective and oth soft tissue of thorax D21.4 Benign neoplasm of connective and oth soft tissue of abdomen D21.5 Benign neoplasm of connective and oth soft tissue of pelvis D21.6 Benign neoplasm of connctv/soft tiss of trunk, unsp
Medications 3
245 Connective Tissue Diseases drugs 33 Neoplasms, Connective Tissue drugs 8 Soft Tissue Neoplasms drugs
MED-RT files conditions by MeSH, which carves the world differently from ICD-10. These are name matches on this code's description, offered as candidates — not as an assertion that they are this code.
Additional references
AHA Coding Clinic® Licence required
Official coding advice for this code. Published by the American Hospital Association. Not included in this installation.