D21.9 — Benign neoplasm of connective and other soft tissue, unspecified

BillableUnspecified

Is D21.9 billable?

Yes, but D21.9 is an unspecified code. D21.9 is a valid, billable ICD-10-CM code for encounters from October 1, 2026 through September 30, 2027. However, D21.9 is an unspecified or catch-all code. Payers apply additional scrutiny to unspecified codes and many deny them when the medical record supports a more specific option, so check the documentation before selecting D21.9 — the more specific alternatives are listed below.

More specific alternatives

D21.9 at a glance

Code	D21.9
Description	Benign neoplasm of connective and other soft tissue, unspecified
Billable	Yes
Code set	ICD-10-CM FY2027
Valid for encounters	October 1, 2026 – September 30, 2027

Which MS-DRGs does D21.9 group to?

D21.9 sits in MDC 08 and helps define the logic of 3 MS-DRGs (version 44, FY2027). Which one a stay actually groups to also depends on procedures and secondary diagnoses.

564Other Musculoskeletal System and Connective Tissue Diagnoses with MCCmedical
565Other Musculoskeletal System and Connective Tissue Diagnoses with CCmedical
566Other Musculoskeletal System and Connective Tissue Diagnoses without CC/MCCmedical

How is D21.9 listed in the Alphabetic Index?

These are the routes through the Alphabetic Index that lead to D21.9. They show the wording a clinician may have documented, which often differs from the Tabular description.

Kimura disease
Disease, diseased › Kimura

Excludes1 — never code together — inherited from D21

The conditions below can never be reported together with D21.9 on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.

benign neoplasm of articular cartilage (D16.-)
benign neoplasm of cartilage of larynx (D14.1)
benign neoplasm of cartilage of nose (D14.0)
benign neoplasm of connective tissue of breast (D24.-)
benign neoplasm of peripheral nerves and autonomic nervous system (D36.1-)
benign neoplasm of peritoneum (D20.1)
benign neoplasm of retroperitoneum (D20.0)
benign neoplasm of uterine ligament, any (D28.2)
benign neoplasm of vascular tissue (D18.-)
hemangioma (D18.0-)
lipomatous neoplasm (D17.-)
lymphangioma (D18.1)
uterine leiomyoma (D25.-)

How long has D21.9 existed?

D21.9 has been in ICD-10-CM since at least FY2016, the earliest fiscal year on record here.

Derived from the official order files for FY2016–FY2026. FY2017 and FY2020 publish no order file, so those years are not covered.