Is ICD-10-CM code D35 billable?

No, D35 (Benign neoplasm of other and unspecified 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 D35 belong to?

D35 belongs to Chapter 2 of the ICD-10-CM tabular list: C00–D49 (Neoplasms).

D35Not billable, use a more specific code below

Benign neoplasm of other and unspecified endocrine glands

In Benign neoplasms, except benign neuroendocrine tumors (D10-D36), chapter 2: Neoplasms

11 billable codes under D35: none are a CC or MCC; 3 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

benign neoplasm of endocrine pancreas (D13.7)
benign neoplasm of ovary (D27.-)
benign neoplasm of testis (D29.2.-)
benign neoplasm of thymus (D15.0)

Use additional code: add a second code for this, listed after this one

code to identify any functional activity

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 D35

D35 can't be used on a claim. Pick a billable code below; grey headings group them.

D35 MS-DRGs

As the principal diagnosis, the billable codes under D35 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)

About the condition

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

Benign Tumors

Tumors are abnormal growths in your body. They can be either benign or malignant. Benign tumors aren't cancer. Malignant ones are. Benign tumors grow only in one place. They cannot spread or invade other parts of your body. Even so, they can be dangerous if they press on vital organs, such as your brain.

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.