Is ICD-10-CM code D44 billable?

No, D44 (Neoplasm of uncertain behavior of endocrine glands) is a non-billable ICD-10-CM code. It must be coded to a more specific subcategory before it can be used for reimbursement.

What chapter does ICD-10-CM code D44 belong to?

D44 belongs to Chapter 2 of the ICD-10-CM tabular list: C00–D49 (Neoplasms).

D44Not billable, use a more specific code below

Neoplasm of uncertain behavior of endocrine glands

In Neoplasms of uncertain behavior, polycythemia vera and myelodysplastic syndromes (D37-D48), chapter 2: Neoplasms

11 billable codes under D44: none are a CC or MCC; 5 map to HCC 23 (Prostate, Breast, and Other Cancers and Tumors).An HCC counts toward a Medicare Advantage patient's risk score.

Instructional notes

Excludes1: not coded here, use a different code

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)

Also applies, from Neoplasms of uncertain behavior, polycythemia vera and myelodysplastic syndromes (D37-D48)

These notes sit on D37-D48 and apply to every code under it, including D44.

Excludes1: not coded here, use a different code

neoplasms of unspecified behavior (D49.-)

Official coding guidelines

From the ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027 (CMS and NCHS). Links open the PDF at the right page.

Rules for coding benign and malignant neoplasms: using the Neoplasm Table, sequencing primary and secondary sites, treatment encounters, complications, and current cancer versus personal history.

Admission/Encounter for treatment of primary site (page 33)
Admission/Encounter for treatment of secondary site (page 33)
Coding and sequencing of complications (page 34)
Primary malignancy previously excised (page 34)
Admissions/Encounters involving antineoplastic chemotherapy, immunotherapy and radiation therapy (page 35)
Admission/encounter to determine extent of malignancy (page 36)
Symptoms, signs, and abnormal findings listed in Chapter 18 associated with neoplasms (page 36)
Admission/encounter for pain control/management (page 36)

Read Section I.C.2 (page 32), 12 more topics

All codes under D44

D44 can't be used on a claim. Pick a billable code below; grey headings group them.

D44 MS-DRGs

As the principal diagnosis, the billable codes under D44 group to MS-DRG 643, 644, 645, 054, or 055 (v44.0). Which one applies depends on procedures performed, secondary diagnoses (CC/MCC), and the patient's age and discharge status.

DRG 643 Endocrine Disorders with MCC (8 of 11 codes)
DRG 644 Endocrine Disorders with CC (8 of 11 codes)
DRG 645 Endocrine Disorders without CC/MCC (8 of 11 codes)
DRG 054 Nervous System Neoplasms with MCC (3 of 11 codes)
DRG 055 Nervous System Neoplasms without MCC (3 of 11 codes)

Other codes that refer to D44

Notes on these codes point to D44.

D49 Excludes2: neoplasms of uncertain behavior (D37-D44, D48)

About the condition

Plain-language background from MedlinePlus (National Library of Medicine), not coding guidance.

Endocrine Diseases

Your endocrine system includes eight major glands throughout your body. These glands make hormones. Hormones are chemical messengers. They travel through your bloodstream to tissues or organs. Hormones work slowly and affect body processes from head to toe. These include:

Code history

Valid since FY2016, when ICD-10-CM took effect on October 1, 2015. No changes since.