D44 – Neoplasm of uncertain behavior of endocrine glands

ICD-10-CM 2027 diagnosis code · Neoplasms of uncertain behavior, polycythemia vera and myelodysplastic syndromes

Non-billable header

ICD-10-CM code D44

Code: D44 (claims format: D44)
Description: Neoplasm of uncertain behavior of endocrine glands
Billable: No – use a more specific code below
Valid for: Dates of service October 1, 2026 – September 30, 2027 (FY2027)
Chapter: 2. Neoplasms (C00-D49)
Block: D37-D48 Neoplasms of uncertain behavior, polycythemia vera and myelodysplastic syndromes

Billable codes under D44

D44 is a header code and cannot be used on claims. Choose the most specific code:

D44.0 – Neoplasm of uncertain behavior of thyroid glandBillable
D44.1 – Neoplasm of uncertain behavior of adrenal glandHeader (more codes below)
D44.2 – Neoplasm of uncertain behavior of parathyroid glandBillable
D44.3 – Neoplasm of uncertain behavior of pituitary glandBillable
D44.4 – Neoplasm of uncertain behavior of craniopharyngeal ductBillable
D44.5 – Neoplasm of uncertain behavior of pineal glandBillable
D44.6 – Neoplasm of uncertain behavior of carotid bodyBillable
D44.7 – Neoplasm of uncertain behavior of aortic body and other paragangliaBillable
D44.9 – Neoplasm of uncertain behavior of unspecified endocrine glandBillable

Notes for D44

Excludes1 (not coded here):

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)

Notes inherited from parent codes

Instructional notes at a category or block level apply to every code below it.

Block D37-D48

Excludes1 (not coded here):

neoplasms of unspecified behavior (D49.-)

Notes:

Categories D37-D44, and D48 classify by site neoplasms of uncertain behavior, i.e., histologic confirmation whether the neoplasm is malignant or benign cannot be made.

Index terms for D44

Entries in the ICD-10-CM alphabetic index that lead to this code:

Frequently asked questions

What is ICD-10 code D44?

D44 is the ICD-10-CM code for neoplasm of uncertain behavior of endocrine glands, in the block D37-D48 (Neoplasms of uncertain behavior, polycythemia vera and myelodysplastic syndromes).

Is D44 a billable code?

No. D44 is a header code with more specific child codes; report one of the billable codes listed above.

Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.