C37 - Malignant neoplasm of thymus
| ICD-10: | C37 |
| Short Description: | Malignant neoplasm of thymus |
| Long Description: | Malignant neoplasm of thymus |
| Status: | Valid for Submission |
| Version: | ICD-10-CM 2023 |
| Code Classification: |
C37 is a billable ICD-10 code used to specify a medical diagnosis of malignant neoplasm of thymus. The code is valid during the fiscal year 2023 from October 01, 2022 through September 30, 2023 for the submission of HIPAA-covered transactions.
The following anatomical sites found in the Table of Neoplasms reference this diagnosis code given the correct histological behavior: Neoplasm, neoplastic thymus (gland) .
Approximate Synonyms
The following clinical terms are approximate synonyms or lay terms that might be used to identify the correct diagnosis code:
- Malignant thymoma
- Malignant tumor of thymus
- Primary malignant neoplasm of thymus
- Primary small cell neoplasm of thymus
- Primary thymic carcinoma
- Stage I: Grossly and microscopically encapsulated
- Stage IIa: Microscopic transcapsular invasion
- Stage IIb: Macroscopic capsular invasion into thymic or surrounding fat, or grossly adherent to, but not breaking through, mediastinal pleura or pericardium
- Stage III: Macroscopic invasion of neighboring organs
- Stage IVa: Pleural or pericardial dissemination
- Stage IVb: Hematogenous or lymphatic dissemination
- Thymic epithelial neoplasm stage finding
- Thymic epithelial neoplasm stage finding
- Thymic epithelial neoplasm stage finding
- Thymic epithelial neoplasm stage finding
- Thymic epithelial neoplasm stage finding
- Thymic epithelial neoplasm stage finding
- Thymoma
- Thymoma type A
- Thymoma type AB
- Thymoma type B
- Type C thymoma
Clinical Information
- Thymoma-. a neoplasm originating from thymic tissue, usually benign, and frequently encapsulated. although it is occasionally invasive, metastases are extremely rare. it consists of any type of thymic epithelial cell as well as lymphocytes that are usually abundant. malignant lymphomas that involve the thymus, e.g., lymphosarcoma, hodgkin's disease (previously termed granulomatous thymoma), should not be regarded as thymoma. (from stedman, 25th ed)
Tabular List of Diseases and Injuries
The Tabular List of Diseases and Injuries is a list of ICD-10 codes, organized "head to toe" into chapters and sections with coding notes and guidance for inclusions, exclusions, descriptions and more. The following references are applicable to this diagnosis code:
Type 1 Excludes
Type 1 ExcludesA 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.
- malignant carcinoid tumor of the thymus C7A.091
Index to Diseases and Injuries References
The Index to Diseases and Injuries is an alphabetical listing of medical terms, with each term mapped to one or more ICD-10 code(s). The following references for this diagnosis code are found in the injuries and diseases index:
- - Carcinoma (malignant) - See Also: Neoplasm, by site, malignant;
- - thymic - C37
- - Thymoma - See Also: Neoplasm, thymus, by type;
- - malignant - C37
- - metaplastic - C37
- - sclerosing - C37
- - type A - C37
- - type AB - C37
- - type B1 - C37
- - type B2 - C37
- - type B3 - C37
Convert to ICD-9 Code
| Source ICD-10 Code | Target ICD-9 Code | |
|---|---|---|
| C37 | 164.0 - Malignant neopl thymus |
Table of Neoplasms
This code is referenced in the table of neoplasms by anatomical site. For each site there are six possible code numbers according to whether the neoplasm in question is malignant, benign, in situ, of uncertain behavior, or of unspecified nature. The description of the neoplasm will often indicate which of the six columns is appropriate.
Where such descriptors are not present, the remainder of the Index should be consulted where guidance is given to the appropriate column for each morphological (histological) variety listed. However, the guidance in the Index can be overridden if one of the descriptors mentioned above is present.
| Neoplasm, neoplastic | Malignant Primary |
Malignant Secondary |
CaInSitu | Benign | Uncertain Behavior |
Unspecified Behavior |
|---|---|---|---|---|---|---|
| »Neoplasm, neoplastic »thymus (gland) | C37 | C79.89 | D09.3 | D15.0 | D38.4 | D49.89 |
Patient Education
Thymus Cancer
The thymus is a small organ in your upper chest, under your breastbone. Before birth and during childhood, the thymus helps the body make a type of white blood cell. These cells help protect you from infections.
Cancer of the thymus is rare. You are more likely to get it if you have other diseases such as myasthenia gravis, lupus or rheumatoid arthritis. Sometimes there are no symptoms. Other times, thymus cancer can cause:
- A cough that doesn't go away
- Chest pain
- Trouble breathing
Doctors use a physical exam, imaging tests, and a biopsy to diagnose thymus cancer. The most common treatment is surgery to remove the tumor. Other options include radiation therapy, chemotherapy, and hormone therapy.
NIH: National Cancer Institute
[Learn More in MedlinePlus]
Code History
- FY 2023 - No Change, effective from 10/1/2022 through 9/30/2023
- FY 2022 - No Change, effective from 10/1/2021 through 9/30/2022
- FY 2021 - No Change, effective from 10/1/2020 through 9/30/2021
- FY 2020 - No Change, effective from 10/1/2019 through 9/30/2020
- FY 2019 - No Change, effective from 10/1/2018 through 9/30/2019
- FY 2018 - No Change, effective from 10/1/2017 through 9/30/2018
- FY 2017 - No Change, effective from 10/1/2016 through 9/30/2017
- FY 2016 - New Code, effective from 10/1/2015 through 9/30/2016 (First year ICD-10-CM implemented into the HIPAA code set)
