2021 ICD-10-CM Code D40.10

Neoplasm of uncertain behavior of unspecified testis

  1. ICD-10-CM Index
  2. Chapter: C00–D48
  3. Section: D37-D48
  4. Block: D40
  5. D40.10 - Neoplasm of uncertain behavior of unspecified testis
Version 2021
Billable Code
Unspecified Code
Diagnoses For Males Only
MS-DRG Mapping

Valid for Submission

D40.10 is a billable diagnosis code used to specify a medical diagnosis of neoplasm of uncertain behavior of unspecified testis. The code D40.10 is valid during the fiscal year 2021 from October 01, 2020 through September 30, 2021 for the submission of HIPAA-covered transactions.

The ICD-10-CM code D40.10 might also be used to specify conditions or terms like leydig cell neoplasm of testis, neoplasm of uncertain behavior of testicular sex cord, neoplasm of uncertain behavior of testis, neoplasm of uncertain behavior of undescended testis, neoplasm of undescended testis , sertoli cell tumor of testis, etc.

The code D40.10 is applicable to male patients only. It is clinically and virtually impossible to use this code on a non-male patient.

Unspecified diagnosis codes like D40.10 are acceptable when clinical information is unknown or not available about a particular condition. Although a more specific code is preferable, unspecified codes should be used when such codes most accurately reflect what is known about a patient's condition. Specific diagnosis codes should not be used if not supported by the patient's medical record.

ICD-10:D40.10
Short Description:Neoplasm of uncertain behavior of unspecified testis
Long Description:Neoplasm of uncertain behavior of unspecified testis

Code Classification

Index to Diseases and Injuries

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 the code D40.10 are found in the index:

Code Edits

The Medicare Code Editor (MCE) detects and reports errors in the coding of claims data. The following ICD-10 Code Edits are applicable to this code:

Approximate Synonyms

The following clinical terms are approximate synonyms or lay terms that might be used to identify the correct diagnosis code:

Convert D40.10 to ICD-9 Code

The General Equivalency Mapping (GEM) crosswalk indicates an approximate mapping between the ICD-10 code D40.10 its ICD-9 equivalent. The approximate mapping means there is not an exact match between the ICD-10 code and the ICD-9 code and the mapped code is not a precise representation of the original code.

Information for Patients


Testicular Cancer

Testicles, or testes, make male hormones and sperm. They are two egg-shaped organs inside the scrotum, the loose sac of skin behind the penis. You can get cancer in one or both testicles.

Testicular cancer mainly affects young men between the ages of 20 and 39. It is also more common in men who

Symptoms include pain, swelling, or lumps in your testicles or groin area. Doctors use a physical exam, lab tests, imaging tests, and a biopsy to diagnose testicular cancer. Most cases can be treated, especially if found early. Treatment options include surgery, radiation, and/or chemotherapy. Regular exams after treatment are important.

Treatments may also cause infertility. If you may want children later on, you should consider sperm banking before treatment.

NIH: National Cancer Institute


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Code History

  • 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)

Previous Code: D40.1

Related Codes

Next Code: D40.11