2026 ICD-10-CM Diagnosis Code D09.3Carcinoma in situ of thyroid and other endocrine glands
ICD-10-CM Codes›C00–D49›D00-D09›D09
- Billable — Valid for Submission
- Chronic Condition
D09.3 is a billable ICD-10-CM diagnosis code for carcinoma in situ of thyroid and other endocrine glands. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 826 through 830, 843 through 845. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Endocrine system cancers - thyroid.
Code Identity
Code Classification
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Carcinoma in situ of adrenal cortex
- Carcinoma in situ of adrenal gland
- Carcinoma in situ of adrenal medulla
- Carcinoma in situ of craniopharyngeal duct
- Carcinoma in situ of endocrine gland
- Carcinoma in situ of multiple endocrine glands
- Carcinoma in situ of parathyroid gland
- Carcinoma in situ of pineal gland
- Carcinoma in situ of pituitary gland
- Carcinoma in situ of thyroglossal duct
- Carcinoma in situ of thyroid gland
- Neoplasm of craniopharyngeal duct
- Neoplasm of thyroglossal duct
- Primary malignant neoplasm of thymus
- Primary squamous cell carcinoma of thymus
Tabular List NotesGuidance
Coding notes and annotation back-references applicable to this code.
Type 1 Excludes
- carcinoma in situ of endocrine pancreas D01.7
- carcinoma in situ of ovary D07.39
- carcinoma in situ of testis D07.69
A type 1 excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Clinical InformationClinical
Empty Sella Syndrome
a condition when the sella turcica is not filled with pituitary tissue. the pituitary gland is either compressed, atrophied, or removed. there are two types: (1) primary empty sella is due a defect in the sella diaphragm leading to arachnoid herniation into the sellar space; (2) secondary empty sella is associated with the removal or treatment of pituitary neoplasms.Sella Turcica
a bony prominence situated on the upper surface of the body of the sphenoid bone. it houses the pituitary gland.
Table of NeoplasmsClinical
Anatomical sites in the Table of Neoplasms that reference this code family.
| Site | Malig. Primary | Malig. Secondary | Ca in situ | Benign | Uncertain | Unspec. |
|---|---|---|---|---|---|---|
| adrenal | C74.9 | C79.7 | D09.3 | D35.0 | D44.1 | D49.7 |
| adrenal › capsule | C74.9 | C79.7 | D09.3 | D35.0 | D44.1 | D49.7 |
| adrenal › cortex | C74.0 | C79.7 | D09.3 | D35.0 | D44.1 | D49.7 |
| adrenal › gland | C74.9 | C79.7 | D09.3 | D35.0 | D44.1 | D49.7 |
| adrenal › medulla | C74.1 | C79.7 | D09.3 | D35.0 | D44.1 | D49.7 |
| cortex | C74.0 | C79.7 | D09.3 | D35.0 | D44.1 | D49.7 |
| cortex › adrenal | C74.0 | C79.7 | D09.3 | D35.0 | D44.1 | D49.7 |
| craniobuccal pouch | C75.2 | C79.89 | D09.3 | D35.2 | D44.3 | D49.7 |
| craniopharyngeal (duct) (pouch) | C75.2 | C79.89 | D09.3 | D35.3 | D44.4 | D49.7 |
| endocrine gland NEC | C75.9 | C79.89 | D09.3 | D35.9 | D44.9 | D49.7 |
| endocrine gland NEC › pluriglandular | C75.8 | C79.89 | D09.3 | D35.7 | D44.9 | D49.7 |
| fossa (of) › pituitary | C75.1 | C79.89 | D09.3 | D35.2 | D44.3 | D49.7 |
| gland, glandular (lymphatic) (system) [See Also: Neoplasm, lymph gland] | C75.9 | C79.89 | D09.3 | D35.9 | D44.9 | D49.7 |
| gland, glandular (lymphatic) (system) [See Also: Neoplasm, lymph gland] › endocrine NEC | C75.9 | C79.89 | D09.3 | D35.9 | D44.9 | D49.7 |
| hypophysis | C75.1 | C79.89 | D09.3 | D35.2 | D44.3 | D49.7 |
| intrasellar | C75.1 | C79.89 | D09.3 | D35.2 | D44.3 | D49.7 |
| medulla | C74.1 | C79.7 | D09.3 | D35.0 | D44.1 | D49.7 |
| medulla › adrenal | C74.1 | C79.7 | D09.3 | D35.0 | D44.1 | D49.7 |
| parathyroid (gland) | C75.0 | C79.89 | D09.3 | D35.1 | D44.2 | D49.7 |
| pineal (body) (gland) | C75.3 | C79.89 | D09.3 | D35.4 | D44.5 | D49.7 |
| pituitary (body) (fossa) (gland) (lobe) | C75.1 | C79.89 | D09.3 | D35.2 | D44.3 | D49.7 |
| pluriendocrine | C75.8 | C79.89 | D09.3 | D35.7 | D44.9 | D49.7 |
| Rathke's pouch | C75.1 | C79.89 | D09.3 | D35.2 | D44.3 | D49.7 |
| sella turcica | C75.1 | C79.89 | D09.3 | D35.2 | D44.3 | D49.7 |
| suprarenal | C74.9 | C79.7 | D09.3 | D35.0 | D44.1 | D49.7 |
| suprarenal › capsule | C74.9 | C79.7 | D09.3 | D35.0 | D44.1 | D49.7 |
| suprarenal › cortex | C74.0 | C79.7 | D09.3 | D35.0 | D44.1 | D49.7 |
| suprarenal › gland | C74.9 | C79.7 | D09.3 | D35.0 | D44.1 | D49.7 |
| suprarenal › medulla | C74.1 | C79.7 | D09.3 | D35.0 | D44.1 | D49.7 |
| thymus (gland) | C37 | C79.89 | D09.3 | D15.0 | D38.4 | D49.89 |
| thyroglossal duct | C73 | C79.89 | D09.3 | D34 | D44.0 | D49.7 |
| thyroid (gland) | C73 | C79.89 | D09.3 | D34 | D44.0 | D49.7 |
Patient EducationClinical
Thyroid Cancer
Thyroid cancer is a cancer that starts in the tissues of the thyroid. Your thyroid is a small, butterfly-shaped gland in the front of your neck. It makes hormones that control the way the body uses energy. These hormones affect nearly every organ in your body and control many of your body's most important functions.
The full article covers:
- What is thyroid cancer?
- What are the different types of thyroid cancer?
- Who is more likely to develop thyroid cancer?
- What are the symptoms of thyroid cancer?
- How is thyroid cancer diagnosed?
- What are the treatments for thyroid cancer?
Read the full article at MedlinePlus
Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.
Convert D09.3 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About D09.3Overview
Is D09.3 (Carcinoma in situ of other and unspecified sites) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report carcinoma in situ of thyroid and other endocrine glands on HIPAA-covered claims from October 1, 2025 through September 30, 2026.
What MS-DRG does D09.3 group to?
When carcinoma in situ of thyroid and other endocrine glands is the principal diagnosis on an inpatient stay, it groups to MS-DRG 826, 827, 828, 829, 830, 843, 844, 845, with relative weights from 0.8516 to 4.6778 depending on complications. Higher weights mean higher Medicare reimbursement.
What is the ICD-9 equivalent of D09.3?
Under the General Equivalence Mappings, carcinoma in situ of thyroid and other endocrine glands converts to ICD-9-CM 234.8 (ca in situ NEC). The mapping is approximate, so confirm the match fits the documentation.
Footnotes
[1] Chronic - a chronic condition code indicates a condition lasting 12 months or longer and its effect on the patient based on one or both of the following criteria:
- The condition results in the need for ongoing intervention with medical products,treatment, services, and special equipment
- The condition places limitations on self-care, independent living, and social interactions.
