D44.9 — Neoplasm of uncertain behavior of unspecified endocrine gland

BillableUnspecified

Is D44.9 billable?

Yes, but D44.9 is an unspecified code. D44.9 is a valid, billable ICD-10-CM code for encounters from October 1, 2026 through September 30, 2027. However, D44.9 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 D44.9 — the more specific alternatives are listed below.

More specific alternatives

D44.9 at a glance

Code	D44.9
Description	Neoplasm of uncertain behavior of unspecified endocrine gland
Billable	Yes
Code set	ICD-10-CM FY2027
Valid for encounters	October 1, 2026 – September 30, 2027

Which MS-DRGs does D44.9 group to?

D44.9 sits in MDC 10 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.

643Endocrine Disorders with MCCmedical
644Endocrine Disorders with CCmedical
645Endocrine Disorders without CC/MCCmedical

How is D44.9 listed in the Alphabetic Index?

These are the routes through the Alphabetic Index that lead to D44.9. They show the wording a clinician may have documented, which often differs from the Tabular description.

Adenoma › endocrine, multiple › unspecified site
Adenoma › multiple endocrine › unspecified site

Excludes1 — never code together — inherited from D37-D48

The conditions below can never be reported together with D44.9 on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.

neoplasms of unspecified behavior (D49.-)

Excludes1 — never code together — inherited from D44

The conditions below can never be reported together with D44.9 on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.

multiple endocrine adenomatosis (E31.2-)
multiple endocrine neoplasia (E31.2-)
neoplasm of uncertain behavior of endocrine pancreas (D37.8)
neoplasm of uncertain behavior of ovary (D39.1-)
neoplasm of uncertain behavior of testis (D40.1-)
neoplasm of uncertain behavior of thymus (D38.4)

How long has D44.9 existed?

D44.9 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.