Is D44.0 a billable ICD-10-CM code?

Yes. D44.0 is a billable, specific ICD-10-CM code and is valid for submission on a claim.

Where does D44.0 sit in the tabular list?

Neoplasms (C00-D49), in the block Neoplasms of uncertain behavior, polycythemia vera and myelodysplastic syndromes (D37-D48).

What cannot be coded together with D44.0?

D44.0 carries Excludes1 notes, which means the conditions they list can never be coded together with it on the same encounter. Some are written on the categories above D44.0 (D44) and apply to it just the same.

D44.0

D44.0 — Neoplasm of uncertain behavior of thyroid gland

Billable / specific codeICD-10-CM

D44.0 is a billable, specific ICD-10-CM code for neoplasm of uncertain behavior of thyroid gland. It is valid for submission on a claim.

Excludes1 inherited from the categories above D44.0

These are not written on D44.0, but they bind it: a note on a category applies to every code beneath it. Billing D44.0 with anything listed here is a denial.

Written on D44 — Neoplasm of uncertain behavior of endocrine glands

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)

Risk adjustment

D44.0 does not map to an HCC and does not risk-adjust under CMS-HCC V28. That is normal — most ICD-10 codes do not. It still needs to be coded correctly; it just will not move a RAF score.

Medicare coverage

D44.0 is named in 21 Medicare coverage policies — 21 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.

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A52986Billing and Coding: Biomarkers for Oncology
A56462Billing and Coding: Erythropoiesis Stimulating Agents (ESA)
A56580Billing and Coding: Computerized Axial Tomography (CT), Thorax

Code history

D44.0 has not changed since FY2024 — no addition, revision or deletion across the three most recent ICD-10-CM releases.

Related codes at this level

Codes that share D44. If D44.0 is not quite right, the correct code is usually one of these.

Questions about D44.0

Is D44.0 a billable ICD-10-CM code?: Yes. D44.0 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
Where does D44.0 sit in the tabular list?: Neoplasms (C00-D49), in the block Neoplasms of uncertain behavior, polycythemia vera and myelodysplastic syndromes (D37-D48).
What cannot be coded together with D44.0?: D44.0 carries Excludes1 notes, which means the conditions they list can never be coded together with it on the same encounter. Some are written on the categories above D44.0 (D44) and apply to it just the same.